/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/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:25:49,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:25:49,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:25:49,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:25:49,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:25:49,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:25:49,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:25:49,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:25:49,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:25:49,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:25:49,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:25:49,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:25:49,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:25:49,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:25:49,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:25:49,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:25:49,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:25:49,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:25:49,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:25:49,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:25:49,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:25:49,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:25:49,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:25:49,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:25:49,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:25:49,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:25:49,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:25:49,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:25:49,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:25:49,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:25:49,843 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:25:49,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:25:50,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:25:50,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:25:50,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:25:50,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:25:50,044 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:25:50,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2022-01-31 17:25:50,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0df8ac7b/662af4ac9c744e0e9a00c5400349219f/FLAGe3c59dbea [2022-01-31 17:25:50,421 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:25:50,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2022-01-31 17:25:50,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0df8ac7b/662af4ac9c744e0e9a00c5400349219f/FLAGe3c59dbea [2022-01-31 17:25:50,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0df8ac7b/662af4ac9c744e0e9a00c5400349219f [2022-01-31 17:25:50,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:25:50,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:25:50,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:25:50,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:25:50,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:25:50,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:25:50" (1/1) ... [2022-01-31 17:25:50,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76dd2a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:50, skipping insertion in model container [2022-01-31 17:25:50,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:25:50" (1/1) ... [2022-01-31 17:25:50,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:25:50,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:25:50,995 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i[821,834] [2022-01-31 17:25:51,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:25:51,021 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:25:51,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i[821,834] [2022-01-31 17:25:51,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:25:51,055 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:25:51,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51 WrapperNode [2022-01-31 17:25:51,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:25:51,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:25:51,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:25:51,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:25:51,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:25:51,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:25:51,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:25:51,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:25:51,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (1/1) ... [2022-01-31 17:25:51,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:25:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:25:51,100 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) [2022-01-31 17:25:51,102 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 [2022-01-31 17:25:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:25:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:25:51,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:25:51,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:25:51,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:25:51,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:25:51,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:25:51,180 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:25:51,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:25:51,317 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:25:51,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:25:51,322 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 17:25:51,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:25:51 BoogieIcfgContainer [2022-01-31 17:25:51,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:25:51,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:25:51,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:25:51,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:25:51,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:25:50" (1/3) ... [2022-01-31 17:25:51,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d11870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:25:51, skipping insertion in model container [2022-01-31 17:25:51,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:25:51" (2/3) ... [2022-01-31 17:25:51,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d11870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:25:51, skipping insertion in model container [2022-01-31 17:25:51,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:25:51" (3/3) ... [2022-01-31 17:25:51,343 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2022-01-31 17:25:51,347 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:25:51,347 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:25:51,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:25:51,400 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 [2022-01-31 17:25:51,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:25:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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) [2022-01-31 17:25:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:25:51,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:51,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:51,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1055076827, now seen corresponding path program 1 times [2022-01-31 17:25:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195053320] [2022-01-31 17:25:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:51,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:51,491 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:51,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:51,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195053320] [2022-01-31 17:25:51,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [195053320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:51,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:51,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:25:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328927684] [2022-01-31 17:25:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:51,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:25:51,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:25:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:25:51,630 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:51,685 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2022-01-31 17:25:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:25:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:25:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:51,695 INFO L225 Difference]: With dead ends: 57 [2022-01-31 17:25:51,695 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 17:25:51,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:25:51,702 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:51,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:25:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 17:25:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 17:25:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 17:25:51,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-01-31 17:25:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:51,728 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 17:25:51,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 17:25:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 17:25:51,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:51,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:51,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:25:51,729 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1984658533, now seen corresponding path program 1 times [2022-01-31 17:25:51,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896380308] [2022-01-31 17:25:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:51,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:51,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:51,783 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896380308] [2022-01-31 17:25:51,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [896380308] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:51,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:51,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:25:51,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620960764] [2022-01-31 17:25:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:51,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:25:51,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:25:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:25:51,785 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:51,855 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2022-01-31 17:25:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:25:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 17:25:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:51,856 INFO L225 Difference]: With dead ends: 54 [2022-01-31 17:25:51,856 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 17:25:51,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:25:51,858 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:51,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 17:25:51,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-01-31 17:25:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 17:25:51,865 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2022-01-31 17:25:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:51,865 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 17:25:51,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 17:25:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 17:25:51,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:51,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:51,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:25:51,867 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash 433762445, now seen corresponding path program 1 times [2022-01-31 17:25:51,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343114075] [2022-01-31 17:25:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:51,880 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:51,880 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:51,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:51,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:51,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343114075] [2022-01-31 17:25:51,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343114075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:51,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:51,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:25:51,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159462552] [2022-01-31 17:25:51,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:51,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:25:51,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:25:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:25:51,967 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:52,069 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2022-01-31 17:25:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:25:52,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 17:25:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:52,071 INFO L225 Difference]: With dead ends: 64 [2022-01-31 17:25:52,072 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 17:25:52,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:25:52,077 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:52,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:52,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 17:25:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-01-31 17:25:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-31 17:25:52,093 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2022-01-31 17:25:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:52,093 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-31 17:25:52,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-31 17:25:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 17:25:52,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:52,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:52,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:25:52,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1424505615, now seen corresponding path program 2 times [2022-01-31 17:25:52,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:52,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775718081] [2022-01-31 17:25:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:52,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:52,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:52,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:52,097 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:52,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775718081] [2022-01-31 17:25:52,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775718081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:52,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:52,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:25:52,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637895770] [2022-01-31 17:25:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:52,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:25:52,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:25:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:25:52,179 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:52,300 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-01-31 17:25:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:25:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 17:25:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:52,301 INFO L225 Difference]: With dead ends: 77 [2022-01-31 17:25:52,301 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:25:52,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:25:52,310 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:52,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:25:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-01-31 17:25:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-01-31 17:25:52,320 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2022-01-31 17:25:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:52,320 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-01-31 17:25:52,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-01-31 17:25:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 17:25:52,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:52,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:52,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:25:52,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:52,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2025197823, now seen corresponding path program 3 times [2022-01-31 17:25:52,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:52,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387640309] [2022-01-31 17:25:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:52,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:52,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:52,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:52,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:52,424 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:52,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387640309] [2022-01-31 17:25:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387640309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:52,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:52,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:25:52,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847713912] [2022-01-31 17:25:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:52,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:25:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:25:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:25:52,426 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:52,533 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-01-31 17:25:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:25:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 17:25:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:52,535 INFO L225 Difference]: With dead ends: 90 [2022-01-31 17:25:52,536 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 17:25:52,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:25:52,541 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:52,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 40 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 17:25:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-01-31 17:25:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-01-31 17:25:52,549 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2022-01-31 17:25:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:52,549 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-01-31 17:25:52,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-01-31 17:25:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 17:25:52,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:52,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:52,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:25:52,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1624056963, now seen corresponding path program 4 times [2022-01-31 17:25:52,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:52,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468643726] [2022-01-31 17:25:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:52,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:52,552 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:52,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:52,553 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:52,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468643726] [2022-01-31 17:25:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468643726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:52,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:25:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680731772] [2022-01-31 17:25:52,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:52,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:25:52,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:25:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:25:52,612 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:52,738 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2022-01-31 17:25:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:25:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 17:25:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:52,739 INFO L225 Difference]: With dead ends: 103 [2022-01-31 17:25:52,739 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 17:25:52,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:25:52,740 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:52,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 35 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 17:25:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-01-31 17:25:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-01-31 17:25:52,752 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2022-01-31 17:25:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:52,752 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-01-31 17:25:52,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-01-31 17:25:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 17:25:52,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:52,756 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:25:52,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -272343179, now seen corresponding path program 5 times [2022-01-31 17:25:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185120316] [2022-01-31 17:25:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:52,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:52,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:52,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:52,759 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:52,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185120316] [2022-01-31 17:25:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185120316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:52,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:52,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:25:52,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401796176] [2022-01-31 17:25:52,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:52,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:25:52,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:25:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:25:52,854 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:52,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:52,996 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-01-31 17:25:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:25:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 17:25:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:52,997 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:25:52,997 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:25:52,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:25:52,998 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:52,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:25:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-01-31 17:25:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 17:25:53,004 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2022-01-31 17:25:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:53,004 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 17:25:53,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 17:25:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:25:53,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:53,005 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:53,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:25:53,005 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1423458295, now seen corresponding path program 6 times [2022-01-31 17:25:53,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:53,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165158137] [2022-01-31 17:25:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:53,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:53,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:53,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:53,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:53,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165158137] [2022-01-31 17:25:53,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165158137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:53,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:53,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:25:53,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140280093] [2022-01-31 17:25:53,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:53,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:25:53,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:25:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:25:53,112 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:53,259 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2022-01-31 17:25:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:25:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 17:25:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:53,260 INFO L225 Difference]: With dead ends: 129 [2022-01-31 17:25:53,260 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 17:25:53,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:25:53,261 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:53,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 50 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 17:25:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-01-31 17:25:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-01-31 17:25:53,300 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2022-01-31 17:25:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:53,301 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-01-31 17:25:53,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-01-31 17:25:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 17:25:53,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:53,303 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:53,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:25:53,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 601817577, now seen corresponding path program 7 times [2022-01-31 17:25:53,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793807544] [2022-01-31 17:25:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:53,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:53,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:53,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:53,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:53,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:53,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793807544] [2022-01-31 17:25:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [793807544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:53,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:53,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:25:53,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712967337] [2022-01-31 17:25:53,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:53,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:25:53,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:25:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:25:53,419 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:53,590 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2022-01-31 17:25:53,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:25:53,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 17:25:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:53,592 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:25:53,592 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:25:53,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:25:53,594 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:53,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 45 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:25:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-01-31 17:25:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-01-31 17:25:53,600 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2022-01-31 17:25:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:53,600 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-01-31 17:25:53,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-01-31 17:25:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:25:53,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:53,601 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:53,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:25:53,601 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1291750763, now seen corresponding path program 8 times [2022-01-31 17:25:53,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149369825] [2022-01-31 17:25:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:53,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:53,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:53,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:53,605 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:53,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:53,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149369825] [2022-01-31 17:25:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [149369825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:53,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:53,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:25:53,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344517756] [2022-01-31 17:25:53,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:53,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:25:53,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:25:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:25:53,699 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:53,905 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2022-01-31 17:25:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:25:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:25:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:53,906 INFO L225 Difference]: With dead ends: 155 [2022-01-31 17:25:53,906 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 17:25:53,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:25:53,906 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:53,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 35 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:53,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 17:25:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-01-31 17:25:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-01-31 17:25:53,925 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2022-01-31 17:25:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:53,925 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-01-31 17:25:53,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-01-31 17:25:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 17:25:53,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:53,927 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:53,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:25:53,927 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash 11458141, now seen corresponding path program 9 times [2022-01-31 17:25:53,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:53,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28607299] [2022-01-31 17:25:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:53,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:53,929 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:53,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:53,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:54,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:54,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28607299] [2022-01-31 17:25:54,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [28607299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:54,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:25:54,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678226174] [2022-01-31 17:25:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:25:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:25:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:25:54,013 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:54,185 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2022-01-31 17:25:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:25:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 17:25:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:54,186 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:25:54,186 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 17:25:54,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:25:54,187 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:54,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 40 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 17:25:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-01-31 17:25:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-01-31 17:25:54,195 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2022-01-31 17:25:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:54,195 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-01-31 17:25:54,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-01-31 17:25:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:25:54,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:54,196 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:54,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:25:54,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash 431295711, now seen corresponding path program 10 times [2022-01-31 17:25:54,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:54,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395856730] [2022-01-31 17:25:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:54,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:54,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:54,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:54,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:54,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395856730] [2022-01-31 17:25:54,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395856730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:54,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:54,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:25:54,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458806993] [2022-01-31 17:25:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:25:54,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:25:54,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:25:54,309 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:54,528 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2022-01-31 17:25:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:25:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 17:25:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:54,529 INFO L225 Difference]: With dead ends: 181 [2022-01-31 17:25:54,529 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:25:54,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:25:54,530 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:54,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 50 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:25:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2022-01-31 17:25:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 17:25:54,540 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2022-01-31 17:25:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:54,541 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 17:25:54,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 17:25:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 17:25:54,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:54,542 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:54,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:25:54,542 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1345790767, now seen corresponding path program 11 times [2022-01-31 17:25:54,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956208699] [2022-01-31 17:25:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:54,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:54,544 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:54,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:54,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:54,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:54,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956208699] [2022-01-31 17:25:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1956208699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:54,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:54,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:25:54,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322628900] [2022-01-31 17:25:54,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:25:54,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:25:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:25:54,663 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:54,921 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2022-01-31 17:25:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:25:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-01-31 17:25:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:54,922 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:25:54,922 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:25:54,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:25:54,923 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:54,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 40 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:25:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-01-31 17:25:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-01-31 17:25:54,930 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 96 [2022-01-31 17:25:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-01-31 17:25:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-01-31 17:25:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:25:54,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:54,931 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:54,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:25:54,931 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2146483795, now seen corresponding path program 12 times [2022-01-31 17:25:54,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:54,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776288654] [2022-01-31 17:25:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:54,932 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:54,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:54,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:54,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:55,047 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:55,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776288654] [2022-01-31 17:25:55,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776288654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:55,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:55,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:25:55,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836201969] [2022-01-31 17:25:55,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:25:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:25:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:25:55,048 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:55,323 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2022-01-31 17:25:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:25:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 17:25:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:55,324 INFO L225 Difference]: With dead ends: 207 [2022-01-31 17:25:55,324 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 17:25:55,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:25:55,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 147 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:55,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 45 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 17:25:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-01-31 17:25:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-01-31 17:25:55,344 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2022-01-31 17:25:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:55,344 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-01-31 17:25:55,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-01-31 17:25:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 17:25:55,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:55,346 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:55,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:25:55,346 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -415099579, now seen corresponding path program 13 times [2022-01-31 17:25:55,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:55,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086240665] [2022-01-31 17:25:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:55,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:55,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:55,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:55,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:55,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:55,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086240665] [2022-01-31 17:25:55,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086240665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:55,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:55,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:25:55,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388006446] [2022-01-31 17:25:55,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:55,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:25:55,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:25:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:25:55,497 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:55,779 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2022-01-31 17:25:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:25:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 17:25:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:55,780 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:25:55,780 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:25:55,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:25:55,782 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 174 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:55,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 40 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:25:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:25:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-01-31 17:25:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-01-31 17:25:55,791 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 110 [2022-01-31 17:25:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:55,791 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-01-31 17:25:55,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-01-31 17:25:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:25:55,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:55,792 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:55,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:25:55,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2032574919, now seen corresponding path program 14 times [2022-01-31 17:25:55,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:55,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243093567] [2022-01-31 17:25:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:55,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:55,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:55,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:55,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:55,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:55,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243093567] [2022-01-31 17:25:55,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243093567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:55,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:55,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:25:55,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844720846] [2022-01-31 17:25:55,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:55,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:25:55,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:25:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:25:55,954 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:56,272 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2022-01-31 17:25:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:25:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 17:25:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:56,272 INFO L225 Difference]: With dead ends: 233 [2022-01-31 17:25:56,273 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 17:25:56,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:25:56,273 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:56,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 40 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 17:25:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-01-31 17:25:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2022-01-31 17:25:56,282 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2022-01-31 17:25:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:56,282 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2022-01-31 17:25:56,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2022-01-31 17:25:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 17:25:56,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:56,283 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:25:56,284 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 699367353, now seen corresponding path program 15 times [2022-01-31 17:25:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702659817] [2022-01-31 17:25:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:56,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:56,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:56,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:56,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:56,450 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702659817] [2022-01-31 17:25:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702659817] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:56,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:56,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:25:56,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002928150] [2022-01-31 17:25:56,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:56,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:25:56,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:25:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:25:56,451 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:56,797 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2022-01-31 17:25:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:25:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 17:25:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:56,798 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:25:56,798 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:25:56,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:25:56,799 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 198 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:56,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 40 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:25:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-01-31 17:25:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0384615384615385) internal successors, (135), 130 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-01-31 17:25:56,809 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 124 [2022-01-31 17:25:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:56,809 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-01-31 17:25:56,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-01-31 17:25:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:25:56,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:56,810 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:56,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:25:56,810 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1934341947, now seen corresponding path program 16 times [2022-01-31 17:25:56,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:56,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511160763] [2022-01-31 17:25:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:56,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:56,811 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:56,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:56,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:56,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:56,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511160763] [2022-01-31 17:25:56,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511160763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:56,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:56,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:25:56,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574298851] [2022-01-31 17:25:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:56,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:25:56,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:25:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:25:56,978 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:57,330 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2022-01-31 17:25:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:25:57,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:25:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:57,331 INFO L225 Difference]: With dead ends: 259 [2022-01-31 17:25:57,331 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 17:25:57,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:25:57,332 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 213 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 45 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 17:25:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2022-01-31 17:25:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-01-31 17:25:57,342 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2022-01-31 17:25:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-01-31 17:25:57,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-01-31 17:25:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 17:25:57,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:57,343 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:57,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:25:57,343 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:57,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:57,344 INFO L85 PathProgramCache]: Analyzing trace with hash 103160877, now seen corresponding path program 17 times [2022-01-31 17:25:57,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:57,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668201524] [2022-01-31 17:25:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:57,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:57,345 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:57,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:57,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:57,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:57,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668201524] [2022-01-31 17:25:57,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668201524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:57,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:25:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824191120] [2022-01-31 17:25:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:57,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:25:57,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:25:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:25:57,522 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:57,910 INFO L93 Difference]: Finished difference Result 272 states and 283 transitions. [2022-01-31 17:25:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:25:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 17:25:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:57,911 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:25:57,911 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:25:57,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:25:57,913 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:57,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 45 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:25:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-01-31 17:25:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 144 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-01-31 17:25:57,923 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 138 [2022-01-31 17:25:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-01-31 17:25:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-01-31 17:25:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:25:57,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:57,925 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:57,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:25:57,925 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1865089361, now seen corresponding path program 18 times [2022-01-31 17:25:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485170436] [2022-01-31 17:25:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:57,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:57,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:57,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:57,928 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:58,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:58,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485170436] [2022-01-31 17:25:58,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485170436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:58,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:58,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:25:58,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269174719] [2022-01-31 17:25:58,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:58,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:25:58,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:25:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:25:58,133 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:58,523 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2022-01-31 17:25:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:25:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 17:25:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:58,524 INFO L225 Difference]: With dead ends: 285 [2022-01-31 17:25:58,524 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:25:58,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:25:58,525 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 258 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:58,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 35 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:25:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-01-31 17:25:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2022-01-31 17:25:58,536 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 145 [2022-01-31 17:25:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:58,536 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2022-01-31 17:25:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2022-01-31 17:25:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 17:25:58,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:58,537 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:58,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:25:58,537 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1480256161, now seen corresponding path program 19 times [2022-01-31 17:25:58,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:58,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610721604] [2022-01-31 17:25:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:58,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:58,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:58,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:58,540 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:58,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610721604] [2022-01-31 17:25:58,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610721604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:58,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:58,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:25:58,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728136095] [2022-01-31 17:25:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:25:58,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:25:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:25:58,731 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:59,207 INFO L93 Difference]: Finished difference Result 298 states and 309 transitions. [2022-01-31 17:25:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:25:59,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-01-31 17:25:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:59,208 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:25:59,208 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:25:59,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:25:59,210 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:59,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 55 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:25:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-01-31 17:25:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-01-31 17:25:59,221 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 152 [2022-01-31 17:25:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:59,222 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-01-31 17:25:59,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-01-31 17:25:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:25:59,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:59,223 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:59,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:25:59,226 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -390629341, now seen corresponding path program 20 times [2022-01-31 17:25:59,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:59,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144535312] [2022-01-31 17:25:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:59,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:59,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:59,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:59,232 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:59,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144535312] [2022-01-31 17:25:59,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144535312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:59,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:59,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:25:59,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348338910] [2022-01-31 17:25:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:59,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:25:59,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:59,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:25:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:25:59,469 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:59,924 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2022-01-31 17:25:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:25:59,924 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 17:25:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:59,925 INFO L225 Difference]: With dead ends: 311 [2022-01-31 17:25:59,925 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 17:25:59,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:25:59,926 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 273 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:59,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 35 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 17:25:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2022-01-31 17:25:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:25:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-01-31 17:25:59,938 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2022-01-31 17:25:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:59,938 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-01-31 17:25:59,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-01-31 17:25:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 17:25:59,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:59,939 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:25:59,939 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2013074667, now seen corresponding path program 21 times [2022-01-31 17:25:59,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:59,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115387646] [2022-01-31 17:25:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:59,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:59,963 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:59,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:59,965 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:00,202 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115387646] [2022-01-31 17:26:00,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115387646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:00,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:00,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:26:00,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66479318] [2022-01-31 17:26:00,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:00,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:26:00,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:26:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:26:00,203 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:00,697 INFO L93 Difference]: Finished difference Result 324 states and 335 transitions. [2022-01-31 17:26:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:26:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-01-31 17:26:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:00,699 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:26:00,699 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 17:26:00,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:26:00,700 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 402 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:00,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 40 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 17:26:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2022-01-31 17:26:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-01-31 17:26:00,712 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 166 [2022-01-31 17:26:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:00,712 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-01-31 17:26:00,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-01-31 17:26:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:26:00,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:00,714 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:00,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:26:00,714 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -966253673, now seen corresponding path program 22 times [2022-01-31 17:26:00,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:00,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428060679] [2022-01-31 17:26:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:00,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:00,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:00,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:00,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:00,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:00,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428060679] [2022-01-31 17:26:00,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [428060679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:00,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:00,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:26:00,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859130531] [2022-01-31 17:26:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:26:00,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:26:00,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:26:00,974 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:01,469 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-01-31 17:26:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:26:01,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 17:26:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:01,470 INFO L225 Difference]: With dead ends: 337 [2022-01-31 17:26:01,470 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 17:26:01,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:26:01,471 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 321 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:01,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 35 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 17:26:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-01-31 17:26:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-01-31 17:26:01,484 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 173 [2022-01-31 17:26:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:01,485 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-01-31 17:26:01,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-01-31 17:26:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 17:26:01,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:01,486 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:01,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:26:01,486 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash -904716919, now seen corresponding path program 23 times [2022-01-31 17:26:01,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015262150] [2022-01-31 17:26:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:01,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:01,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:01,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:01,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:01,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:01,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015262150] [2022-01-31 17:26:01,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015262150] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:01,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:01,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:26:01,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406491934] [2022-01-31 17:26:01,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:01,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:26:01,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:01,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:26:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:26:01,773 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:02,343 INFO L93 Difference]: Finished difference Result 350 states and 361 transitions. [2022-01-31 17:26:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:26:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 17:26:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:02,344 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:26:02,344 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 17:26:02,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:26:02,346 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 288 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:02,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 40 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:02,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 17:26:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-01-31 17:26:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-01-31 17:26:02,369 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 180 [2022-01-31 17:26:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:02,369 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-01-31 17:26:02,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-01-31 17:26:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:26:02,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:02,370 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:02,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:26:02,370 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -371457781, now seen corresponding path program 24 times [2022-01-31 17:26:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:02,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579490386] [2022-01-31 17:26:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:02,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:02,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:02,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:02,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:02,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:02,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:02,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579490386] [2022-01-31 17:26:02,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579490386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:02,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:02,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:26:02,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195137896] [2022-01-31 17:26:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:02,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:26:02,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:26:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:26:02,688 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:03,229 INFO L93 Difference]: Finished difference Result 363 states and 374 transitions. [2022-01-31 17:26:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:26:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:26:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:03,230 INFO L225 Difference]: With dead ends: 363 [2022-01-31 17:26:03,230 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 17:26:03,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:26:03,231 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:03,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 40 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 17:26:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-01-31 17:26:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-01-31 17:26:03,247 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 187 [2022-01-31 17:26:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:03,247 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-01-31 17:26:03,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-01-31 17:26:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 17:26:03,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:03,248 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:03,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:26:03,248 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1602257405, now seen corresponding path program 25 times [2022-01-31 17:26:03,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:03,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081573077] [2022-01-31 17:26:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:03,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:03,249 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:03,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:03,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:03,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:03,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081573077] [2022-01-31 17:26:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081573077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:03,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:03,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:26:03,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242741265] [2022-01-31 17:26:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:03,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:26:03,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:26:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:26:03,548 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:04,165 INFO L93 Difference]: Finished difference Result 376 states and 387 transitions. [2022-01-31 17:26:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:26:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 17:26:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:04,166 INFO L225 Difference]: With dead ends: 376 [2022-01-31 17:26:04,166 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:26:04,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:26:04,167 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 318 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:04,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 50 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:26:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2022-01-31 17:26:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.025) internal successors, (205), 200 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-01-31 17:26:04,184 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 194 [2022-01-31 17:26:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:04,184 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-01-31 17:26:04,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:04,184 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-01-31 17:26:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:26:04,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:04,185 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:04,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:26:04,185 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash -947384193, now seen corresponding path program 26 times [2022-01-31 17:26:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:04,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958574565] [2022-01-31 17:26:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:04,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:04,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:04,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:04,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:04,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:04,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958574565] [2022-01-31 17:26:04,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958574565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:04,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:04,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:26:04,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985471351] [2022-01-31 17:26:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:04,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:26:04,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:26:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:26:04,514 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:05,091 INFO L93 Difference]: Finished difference Result 389 states and 400 transitions. [2022-01-31 17:26:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:26:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 17:26:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:05,092 INFO L225 Difference]: With dead ends: 389 [2022-01-31 17:26:05,092 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:26:05,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:26:05,093 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 306 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:05,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 45 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:26:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:26:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2022-01-31 17:26:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 207 states have (on average 1.0241545893719808) internal successors, (212), 207 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2022-01-31 17:26:05,130 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2022-01-31 17:26:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2022-01-31 17:26:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2022-01-31 17:26:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 17:26:05,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:05,131 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:05,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:26:05,132 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash -706733967, now seen corresponding path program 27 times [2022-01-31 17:26:05,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878384397] [2022-01-31 17:26:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:05,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:05,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:05,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:05,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:05,452 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:05,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878384397] [2022-01-31 17:26:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878384397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:05,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:05,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:26:05,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414334603] [2022-01-31 17:26:05,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:05,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:26:05,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:26:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:26:05,454 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:06,163 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2022-01-31 17:26:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:26:06,163 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-01-31 17:26:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:06,164 INFO L225 Difference]: With dead ends: 402 [2022-01-31 17:26:06,164 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:26:06,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:26:06,166 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 345 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:06,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 55 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:26:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2022-01-31 17:26:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 214 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2022-01-31 17:26:06,184 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 208 [2022-01-31 17:26:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2022-01-31 17:26:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2022-01-31 17:26:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:26:06,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:06,185 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:06,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:26:06,185 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -933146125, now seen corresponding path program 28 times [2022-01-31 17:26:06,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:06,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727850334] [2022-01-31 17:26:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:06,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:06,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:06,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:06,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:06,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727850334] [2022-01-31 17:26:06,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1727850334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:06,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:06,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:26:06,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348839150] [2022-01-31 17:26:06,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:06,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:26:06,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:06,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:26:06,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:26:06,591 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:07,284 INFO L93 Difference]: Finished difference Result 415 states and 426 transitions. [2022-01-31 17:26:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:26:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 17:26:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:07,285 INFO L225 Difference]: With dead ends: 415 [2022-01-31 17:26:07,285 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 17:26:07,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:26:07,287 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 375 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:07,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 50 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 17:26:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2022-01-31 17:26:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.0226244343891402) internal successors, (226), 221 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-01-31 17:26:07,306 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 215 [2022-01-31 17:26:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-01-31 17:26:07,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-01-31 17:26:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 17:26:07,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:07,307 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:26:07,307 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1195827429, now seen corresponding path program 29 times [2022-01-31 17:26:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900597705] [2022-01-31 17:26:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:07,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:07,308 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:07,311 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:07,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:07,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900597705] [2022-01-31 17:26:07,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900597705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:07,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:07,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:26:07,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937359767] [2022-01-31 17:26:07,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:07,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:26:07,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:26:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:26:07,673 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:08,353 INFO L93 Difference]: Finished difference Result 428 states and 439 transitions. [2022-01-31 17:26:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:26:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 17:26:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:08,354 INFO L225 Difference]: With dead ends: 428 [2022-01-31 17:26:08,354 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:26:08,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:26:08,356 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 333 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:08,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 55 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:26:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2022-01-31 17:26:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.0219298245614035) internal successors, (233), 228 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2022-01-31 17:26:08,376 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 222 [2022-01-31 17:26:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:08,376 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2022-01-31 17:26:08,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 32 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2022-01-31 17:26:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:26:08,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:08,377 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:08,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:26:08,377 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1982020249, now seen corresponding path program 30 times [2022-01-31 17:26:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:08,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271464490] [2022-01-31 17:26:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:08,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:08,378 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:08,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:08,381 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:08,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:08,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271464490] [2022-01-31 17:26:08,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271464490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:08,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:08,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:26:08,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814309058] [2022-01-31 17:26:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:08,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:26:08,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:26:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:26:08,773 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:09,482 INFO L93 Difference]: Finished difference Result 441 states and 452 transitions. [2022-01-31 17:26:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:26:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 17:26:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:09,483 INFO L225 Difference]: With dead ends: 441 [2022-01-31 17:26:09,483 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 17:26:09,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:26:09,484 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 396 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:09,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 45 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 17:26:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2022-01-31 17:26:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.0212765957446808) internal successors, (240), 235 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 245 transitions. [2022-01-31 17:26:09,505 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 245 transitions. Word has length 229 [2022-01-31 17:26:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:09,506 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 245 transitions. [2022-01-31 17:26:09,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 33 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 245 transitions. [2022-01-31 17:26:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-01-31 17:26:09,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:09,507 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:09,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:26:09,507 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:09,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1706435751, now seen corresponding path program 31 times [2022-01-31 17:26:09,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491422483] [2022-01-31 17:26:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:09,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:09,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:09,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:09,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:09,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491422483] [2022-01-31 17:26:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491422483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:09,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:26:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257549203] [2022-01-31 17:26:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:26:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:26:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:26:09,942 INFO L87 Difference]: Start difference. First operand 241 states and 245 transitions. Second operand has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:10,682 INFO L93 Difference]: Finished difference Result 454 states and 465 transitions. [2022-01-31 17:26:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:26:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-01-31 17:26:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:10,683 INFO L225 Difference]: With dead ends: 454 [2022-01-31 17:26:10,683 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:26:10,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:26:10,684 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 342 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:10,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 55 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:26:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2022-01-31 17:26:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0206611570247934) internal successors, (247), 242 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2022-01-31 17:26:10,724 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 236 [2022-01-31 17:26:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2022-01-31 17:26:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 34 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2022-01-31 17:26:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:26:10,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:10,725 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:10,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:26:10,725 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 502229723, now seen corresponding path program 32 times [2022-01-31 17:26:10,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133952277] [2022-01-31 17:26:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:10,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:10,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:10,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:10,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:11,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133952277] [2022-01-31 17:26:11,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133952277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:11,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:11,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:26:11,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756660939] [2022-01-31 17:26:11,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:11,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:26:11,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:26:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:26:11,163 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:11,951 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-01-31 17:26:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:26:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:26:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:11,952 INFO L225 Difference]: With dead ends: 467 [2022-01-31 17:26:11,952 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 17:26:11,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:26:11,954 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 495 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:11,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 40 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 17:26:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-01-31 17:26:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.0200803212851406) internal successors, (254), 249 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 259 transitions. [2022-01-31 17:26:11,977 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 259 transitions. Word has length 243 [2022-01-31 17:26:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:11,977 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 259 transitions. [2022-01-31 17:26:11,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,977 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 259 transitions. [2022-01-31 17:26:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 17:26:11,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:11,978 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:11,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:26:11,978 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1040316467, now seen corresponding path program 33 times [2022-01-31 17:26:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194900680] [2022-01-31 17:26:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:11,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:11,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:11,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:11,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:12,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:12,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194900680] [2022-01-31 17:26:12,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194900680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:12,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:12,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:26:12,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291643622] [2022-01-31 17:26:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:12,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:26:12,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:26:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:26:12,499 INFO L87 Difference]: Start difference. First operand 255 states and 259 transitions. Second operand has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 36 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:13,332 INFO L93 Difference]: Finished difference Result 480 states and 491 transitions. [2022-01-31 17:26:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:26:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 36 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-01-31 17:26:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:13,333 INFO L225 Difference]: With dead ends: 480 [2022-01-31 17:26:13,333 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 17:26:13,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:26:13,334 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 480 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:13,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 40 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 17:26:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2022-01-31 17:26:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 266 transitions. [2022-01-31 17:26:13,358 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 266 transitions. Word has length 250 [2022-01-31 17:26:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:13,359 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 266 transitions. [2022-01-31 17:26:13,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 36 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 266 transitions. [2022-01-31 17:26:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:26:13,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:13,360 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:13,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:26:13,360 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1259225679, now seen corresponding path program 34 times [2022-01-31 17:26:13,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783939620] [2022-01-31 17:26:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:13,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:13,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:13,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:13,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:13,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:13,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783939620] [2022-01-31 17:26:13,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [783939620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:13,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:13,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:26:13,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444755986] [2022-01-31 17:26:13,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:13,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:26:13,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:26:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:26:13,891 INFO L87 Difference]: Start difference. First operand 262 states and 266 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:14,770 INFO L93 Difference]: Finished difference Result 493 states and 504 transitions. [2022-01-31 17:26:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:26:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 17:26:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:14,771 INFO L225 Difference]: With dead ends: 493 [2022-01-31 17:26:14,771 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:26:14,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:26:14,772 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 507 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:14,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 40 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:26:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2022-01-31 17:26:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 263 states have (on average 1.0190114068441065) internal successors, (268), 263 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 273 transitions. [2022-01-31 17:26:14,799 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 273 transitions. Word has length 257 [2022-01-31 17:26:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:14,799 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 273 transitions. [2022-01-31 17:26:14,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 273 transitions. [2022-01-31 17:26:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-31 17:26:14,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:14,800 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:14,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:26:14,800 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash -34052543, now seen corresponding path program 35 times [2022-01-31 17:26:14,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:14,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994902591] [2022-01-31 17:26:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:14,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:14,801 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:14,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:14,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:15,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994902591] [2022-01-31 17:26:15,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [994902591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:15,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:15,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:26:15,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244208215] [2022-01-31 17:26:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:15,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:26:15,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:26:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:26:15,318 INFO L87 Difference]: Start difference. First operand 269 states and 273 transitions. Second operand has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:16,199 INFO L93 Difference]: Finished difference Result 506 states and 517 transitions. [2022-01-31 17:26:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:26:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-01-31 17:26:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:16,201 INFO L225 Difference]: With dead ends: 506 [2022-01-31 17:26:16,201 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:26:16,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:26:16,203 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 483 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:16,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 45 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:26:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2022-01-31 17:26:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 270 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-01-31 17:26:16,230 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 264 [2022-01-31 17:26:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:16,230 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-01-31 17:26:16,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 38 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-01-31 17:26:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:26:16,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:16,231 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:16,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:26:16,231 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash -869381181, now seen corresponding path program 36 times [2022-01-31 17:26:16,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:16,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001322093] [2022-01-31 17:26:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:16,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:16,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:16,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:16,235 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:16,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:16,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001322093] [2022-01-31 17:26:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001322093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:16,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:16,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:26:16,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324124630] [2022-01-31 17:26:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:26:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:26:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:26:16,773 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 40 states, 40 states have (on average 1.425) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:17,694 INFO L93 Difference]: Finished difference Result 519 states and 530 transitions. [2022-01-31 17:26:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:26:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 17:26:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:17,696 INFO L225 Difference]: With dead ends: 519 [2022-01-31 17:26:17,696 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 17:26:17,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:26:17,697 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 492 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:17,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 45 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 17:26:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 283. [2022-01-31 17:26:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.0180505415162455) internal successors, (282), 277 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 287 transitions. [2022-01-31 17:26:17,726 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 287 transitions. Word has length 271 [2022-01-31 17:26:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:17,726 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 287 transitions. [2022-01-31 17:26:17,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 39 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 287 transitions. [2022-01-31 17:26:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 17:26:17,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:17,727 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:17,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:26:17,727 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash 441317045, now seen corresponding path program 37 times [2022-01-31 17:26:17,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:17,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566953222] [2022-01-31 17:26:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:17,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:17,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:17,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:17,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:18,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566953222] [2022-01-31 17:26:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566953222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:18,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:18,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:26:18,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786414114] [2022-01-31 17:26:18,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:26:18,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:26:18,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:26:18,279 INFO L87 Difference]: Start difference. First operand 283 states and 287 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:19,290 INFO L93 Difference]: Finished difference Result 532 states and 543 transitions. [2022-01-31 17:26:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:26:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 17:26:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:19,291 INFO L225 Difference]: With dead ends: 532 [2022-01-31 17:26:19,291 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:26:19,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:26:19,292 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 480 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:19,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 60 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:26:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2022-01-31 17:26:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.017605633802817) internal successors, (289), 284 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 294 transitions. [2022-01-31 17:26:19,321 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 294 transitions. Word has length 278 [2022-01-31 17:26:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:19,321 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 294 transitions. [2022-01-31 17:26:19,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 40 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 294 transitions. [2022-01-31 17:26:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:26:19,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:19,323 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:19,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:26:19,323 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1866168521, now seen corresponding path program 38 times [2022-01-31 17:26:19,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:19,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670392032] [2022-01-31 17:26:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:19,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:19,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:19,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:19,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:19,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670392032] [2022-01-31 17:26:19,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670392032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:19,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:19,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:26:19,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5954226] [2022-01-31 17:26:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:19,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:26:19,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:26:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:26:19,901 INFO L87 Difference]: Start difference. First operand 290 states and 294 transitions. Second operand has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:20,896 INFO L93 Difference]: Finished difference Result 545 states and 556 transitions. [2022-01-31 17:26:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:26:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 17:26:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:20,897 INFO L225 Difference]: With dead ends: 545 [2022-01-31 17:26:20,897 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 17:26:20,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:26:20,898 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 540 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:20,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 40 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 17:26:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2022-01-31 17:26:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.0171821305841924) internal successors, (296), 291 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 301 transitions. [2022-01-31 17:26:20,930 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 301 transitions. Word has length 285 [2022-01-31 17:26:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:20,930 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 301 transitions. [2022-01-31 17:26:20,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 41 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 301 transitions. [2022-01-31 17:26:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-01-31 17:26:20,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:20,932 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:20,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:26:20,932 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1349273303, now seen corresponding path program 39 times [2022-01-31 17:26:20,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:20,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730202189] [2022-01-31 17:26:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:20,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:20,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:20,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:20,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:21,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:21,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730202189] [2022-01-31 17:26:21,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730202189] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:21,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:21,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:26:21,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219150570] [2022-01-31 17:26:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:26:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:26:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:26:21,520 INFO L87 Difference]: Start difference. First operand 297 states and 301 transitions. Second operand has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:22,558 INFO L93 Difference]: Finished difference Result 558 states and 569 transitions. [2022-01-31 17:26:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:26:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-01-31 17:26:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:22,559 INFO L225 Difference]: With dead ends: 558 [2022-01-31 17:26:22,560 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 17:26:22,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:26:22,561 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 501 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:22,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 50 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 17:26:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-01-31 17:26:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.016778523489933) internal successors, (303), 298 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 308 transitions. [2022-01-31 17:26:22,593 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 308 transitions. Word has length 292 [2022-01-31 17:26:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:22,593 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 308 transitions. [2022-01-31 17:26:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 42 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 308 transitions. [2022-01-31 17:26:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:26:22,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:22,594 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:22,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:26:22,594 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash -54135637, now seen corresponding path program 40 times [2022-01-31 17:26:22,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:22,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339177314] [2022-01-31 17:26:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:22,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:22,596 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:22,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:22,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:23,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:23,193 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:23,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339177314] [2022-01-31 17:26:23,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1339177314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:23,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:23,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:26:23,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038534276] [2022-01-31 17:26:23,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:23,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:26:23,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:26:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:26:23,195 INFO L87 Difference]: Start difference. First operand 304 states and 308 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:24,274 INFO L93 Difference]: Finished difference Result 571 states and 582 transitions. [2022-01-31 17:26:24,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:26:24,275 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:26:24,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:24,276 INFO L225 Difference]: With dead ends: 571 [2022-01-31 17:26:24,276 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 17:26:24,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:26:24,277 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 504 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:24,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 55 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 17:26:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2022-01-31 17:26:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.0163934426229508) internal successors, (310), 305 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 315 transitions. [2022-01-31 17:26:24,310 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 315 transitions. Word has length 299 [2022-01-31 17:26:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:24,310 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 315 transitions. [2022-01-31 17:26:24,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 43 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 315 transitions. [2022-01-31 17:26:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 17:26:24,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:24,312 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:24,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:26:24,312 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1658760605, now seen corresponding path program 41 times [2022-01-31 17:26:24,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167504297] [2022-01-31 17:26:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:24,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:24,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:24,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:24,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:24,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:24,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:24,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167504297] [2022-01-31 17:26:24,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [167504297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:24,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:24,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:26:24,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971689006] [2022-01-31 17:26:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:24,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:26:24,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:24,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:26:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:26:24,949 INFO L87 Difference]: Start difference. First operand 311 states and 315 transitions. Second operand has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 44 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:26,072 INFO L93 Difference]: Finished difference Result 584 states and 595 transitions. [2022-01-31 17:26:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:26:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 44 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-01-31 17:26:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:26,073 INFO L225 Difference]: With dead ends: 584 [2022-01-31 17:26:26,073 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 17:26:26,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:26:26,074 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 459 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:26,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 60 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 17:26:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2022-01-31 17:26:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 312 states have (on average 1.016025641025641) internal successors, (317), 312 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 322 transitions. [2022-01-31 17:26:26,109 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 322 transitions. Word has length 306 [2022-01-31 17:26:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:26,109 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 322 transitions. [2022-01-31 17:26:26,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 44 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 322 transitions. [2022-01-31 17:26:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 17:26:26,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:26,110 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:26,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:26:26,110 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash 682071071, now seen corresponding path program 42 times [2022-01-31 17:26:26,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:26,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773008510] [2022-01-31 17:26:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:26,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:26,112 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:26,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:26,116 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:26,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:26,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773008510] [2022-01-31 17:26:26,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [773008510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:26,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:26,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:26:26,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103654268] [2022-01-31 17:26:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:26,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:26:26,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:26:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:26:26,797 INFO L87 Difference]: Start difference. First operand 318 states and 322 transitions. Second operand has 46 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 45 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:27,953 INFO L93 Difference]: Finished difference Result 597 states and 608 transitions. [2022-01-31 17:26:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:26:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 45 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 17:26:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:27,954 INFO L225 Difference]: With dead ends: 597 [2022-01-31 17:26:27,954 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:26:27,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:26:27,956 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 615 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:27,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 50 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:26:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2022-01-31 17:26:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 319 states have (on average 1.0156739811912225) internal successors, (324), 319 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 329 transitions. [2022-01-31 17:26:27,992 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 329 transitions. Word has length 313 [2022-01-31 17:26:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:27,993 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 329 transitions. [2022-01-31 17:26:27,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 45 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 329 transitions. [2022-01-31 17:26:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-31 17:26:27,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:27,994 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:27,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:26:27,995 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash 633590801, now seen corresponding path program 43 times [2022-01-31 17:26:27,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:27,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191330328] [2022-01-31 17:26:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:27,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:27,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:27,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:28,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:28,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:28,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191330328] [2022-01-31 17:26:28,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191330328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:28,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:28,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:26:28,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490373474] [2022-01-31 17:26:28,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:26:28,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:26:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:26:28,714 INFO L87 Difference]: Start difference. First operand 325 states and 329 transitions. Second operand has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 46 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:29,907 INFO L93 Difference]: Finished difference Result 610 states and 621 transitions. [2022-01-31 17:26:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:26:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 46 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-01-31 17:26:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:29,908 INFO L225 Difference]: With dead ends: 610 [2022-01-31 17:26:29,908 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 17:26:29,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:26:29,910 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 615 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:29,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 40 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 17:26:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2022-01-31 17:26:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 336 transitions. [2022-01-31 17:26:29,970 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 336 transitions. Word has length 320 [2022-01-31 17:26:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:29,971 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 336 transitions. [2022-01-31 17:26:29,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 46 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 336 transitions. [2022-01-31 17:26:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:26:29,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:29,976 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:26:29,976 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 559834515, now seen corresponding path program 44 times [2022-01-31 17:26:29,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381687943] [2022-01-31 17:26:29,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:29,978 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:29,978 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:29,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:29,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:30,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:30,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:30,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381687943] [2022-01-31 17:26:30,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381687943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:30,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:30,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:26:30,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171364265] [2022-01-31 17:26:30,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:30,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:26:30,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:26:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:26:30,691 INFO L87 Difference]: Start difference. First operand 332 states and 336 transitions. Second operand has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:31,957 INFO L93 Difference]: Finished difference Result 623 states and 634 transitions. [2022-01-31 17:26:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:26:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 17:26:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:31,958 INFO L225 Difference]: With dead ends: 623 [2022-01-31 17:26:31,958 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 17:26:31,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:26:31,959 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 669 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:31,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 40 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 17:26:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 339. [2022-01-31 17:26:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 333 states have (on average 1.015015015015015) internal successors, (338), 333 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 343 transitions. [2022-01-31 17:26:31,998 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 343 transitions. Word has length 327 [2022-01-31 17:26:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 343 transitions. [2022-01-31 17:26:31,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 47 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 343 transitions. [2022-01-31 17:26:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 17:26:32,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:32,000 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:32,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:26:32,000 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1985490053, now seen corresponding path program 45 times [2022-01-31 17:26:32,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:32,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118817696] [2022-01-31 17:26:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:32,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:32,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:32,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:32,005 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:32,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:32,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118817696] [2022-01-31 17:26:32,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118817696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:32,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:32,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:26:32,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399929616] [2022-01-31 17:26:32,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:32,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:26:32,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:26:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:26:32,725 INFO L87 Difference]: Start difference. First operand 339 states and 343 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:34,027 INFO L93 Difference]: Finished difference Result 636 states and 647 transitions. [2022-01-31 17:26:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:26:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-01-31 17:26:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:34,029 INFO L225 Difference]: With dead ends: 636 [2022-01-31 17:26:34,029 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:26:34,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:26:34,030 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 696 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:34,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 40 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:26:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2022-01-31 17:26:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0147058823529411) internal successors, (345), 340 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 350 transitions. [2022-01-31 17:26:34,070 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 350 transitions. Word has length 334 [2022-01-31 17:26:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:34,071 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 350 transitions. [2022-01-31 17:26:34,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 350 transitions. [2022-01-31 17:26:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:26:34,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:34,072 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:34,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:26:34,072 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 677341447, now seen corresponding path program 46 times [2022-01-31 17:26:34,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:34,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840278937] [2022-01-31 17:26:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:34,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:34,074 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:34,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:34,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:34,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:34,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840278937] [2022-01-31 17:26:34,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1840278937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:34,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:34,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:26:34,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565072138] [2022-01-31 17:26:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:34,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:26:34,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:26:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:26:34,854 INFO L87 Difference]: Start difference. First operand 346 states and 350 transitions. Second operand has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:36,184 INFO L93 Difference]: Finished difference Result 649 states and 660 transitions. [2022-01-31 17:26:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:26:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 17:26:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:36,185 INFO L225 Difference]: With dead ends: 649 [2022-01-31 17:26:36,185 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 17:26:36,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:26:36,186 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 603 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:36,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 40 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 17:26:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 353. [2022-01-31 17:26:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 347 states have (on average 1.0144092219020173) internal successors, (352), 347 states have internal predecessors, (352), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 357 transitions. [2022-01-31 17:26:36,228 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 357 transitions. Word has length 341 [2022-01-31 17:26:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:36,229 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 357 transitions. [2022-01-31 17:26:36,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.34) internal successors, (67), 49 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 357 transitions. [2022-01-31 17:26:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-31 17:26:36,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:36,230 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:36,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:26:36,230 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1624197383, now seen corresponding path program 47 times [2022-01-31 17:26:36,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:36,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837670922] [2022-01-31 17:26:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:36,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:36,232 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:36,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:36,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:37,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:37,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:37,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837670922] [2022-01-31 17:26:37,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [837670922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:37,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:37,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:26:37,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164347054] [2022-01-31 17:26:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:37,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:26:37,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:26:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:26:37,066 INFO L87 Difference]: Start difference. First operand 353 states and 357 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 50 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:38,445 INFO L93 Difference]: Finished difference Result 662 states and 673 transitions. [2022-01-31 17:26:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:26:38,446 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 50 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 348 [2022-01-31 17:26:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:38,446 INFO L225 Difference]: With dead ends: 662 [2022-01-31 17:26:38,446 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 17:26:38,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:26:38,448 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 564 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:38,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 55 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 17:26:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 360. [2022-01-31 17:26:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0141242937853108) internal successors, (359), 354 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 364 transitions. [2022-01-31 17:26:38,491 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 364 transitions. Word has length 348 [2022-01-31 17:26:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:38,492 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 364 transitions. [2022-01-31 17:26:38,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 50 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 364 transitions. [2022-01-31 17:26:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:26:38,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:38,493 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:38,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:26:38,493 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash -207643013, now seen corresponding path program 48 times [2022-01-31 17:26:38,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:38,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762512204] [2022-01-31 17:26:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:38,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:38,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:38,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:38,499 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:39,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:39,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:39,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762512204] [2022-01-31 17:26:39,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762512204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:39,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:39,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:26:39,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062309037] [2022-01-31 17:26:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:39,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:26:39,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:26:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:26:39,355 INFO L87 Difference]: Start difference. First operand 360 states and 364 transitions. Second operand has 52 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:40,786 INFO L93 Difference]: Finished difference Result 675 states and 686 transitions. [2022-01-31 17:26:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:26:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:26:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:40,788 INFO L225 Difference]: With dead ends: 675 [2022-01-31 17:26:40,788 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 17:26:40,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:26:40,791 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 615 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:40,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 55 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 17:26:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2022-01-31 17:26:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.0138504155124655) internal successors, (366), 361 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 371 transitions. [2022-01-31 17:26:40,839 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 371 transitions. Word has length 355 [2022-01-31 17:26:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:40,839 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 371 transitions. [2022-01-31 17:26:40,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 371 transitions. [2022-01-31 17:26:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 17:26:40,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:40,841 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:40,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:26:40,841 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash -144542867, now seen corresponding path program 49 times [2022-01-31 17:26:40,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:40,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002566313] [2022-01-31 17:26:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:40,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:40,842 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:40,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:40,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:41,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:41,674 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:41,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002566313] [2022-01-31 17:26:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002566313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:41,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:41,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:26:41,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073347969] [2022-01-31 17:26:41,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:41,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:26:41,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:26:41,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:26:41,675 INFO L87 Difference]: Start difference. First operand 367 states and 371 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:43,177 INFO L93 Difference]: Finished difference Result 688 states and 699 transitions. [2022-01-31 17:26:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:26:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 362 [2022-01-31 17:26:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:43,178 INFO L225 Difference]: With dead ends: 688 [2022-01-31 17:26:43,178 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 17:26:43,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:26:43,179 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 723 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:43,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 35 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 17:26:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2022-01-31 17:26:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 368 states have (on average 1.013586956521739) internal successors, (373), 368 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 378 transitions. [2022-01-31 17:26:43,227 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 378 transitions. Word has length 362 [2022-01-31 17:26:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:43,227 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 378 transitions. [2022-01-31 17:26:43,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 378 transitions. [2022-01-31 17:26:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 17:26:43,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:43,229 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:43,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:26:43,229 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash -309066257, now seen corresponding path program 50 times [2022-01-31 17:26:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983385805] [2022-01-31 17:26:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:43,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:43,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:43,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:43,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:44,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:44,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:44,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983385805] [2022-01-31 17:26:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983385805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:44,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:26:44,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277094565] [2022-01-31 17:26:44,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:44,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:26:44,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:26:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:26:44,129 INFO L87 Difference]: Start difference. First operand 374 states and 378 transitions. Second operand has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:45,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:45,712 INFO L93 Difference]: Finished difference Result 701 states and 712 transitions. [2022-01-31 17:26:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:26:45,713 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 17:26:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:45,714 INFO L225 Difference]: With dead ends: 701 [2022-01-31 17:26:45,714 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:26:45,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:26:45,717 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 657 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:45,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 50 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:26:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 381. [2022-01-31 17:26:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 375 states have (on average 1.0133333333333334) internal successors, (380), 375 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 385 transitions. [2022-01-31 17:26:45,766 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 385 transitions. Word has length 369 [2022-01-31 17:26:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:45,766 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 385 transitions. [2022-01-31 17:26:45,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 53 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 385 transitions. [2022-01-31 17:26:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-31 17:26:45,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:45,768 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:45,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:26:45,768 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash 578970081, now seen corresponding path program 51 times [2022-01-31 17:26:45,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:45,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157315794] [2022-01-31 17:26:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:45,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:45,769 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:45,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:45,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:46,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:46,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:46,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157315794] [2022-01-31 17:26:46,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157315794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:46,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:46,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:26:46,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756063855] [2022-01-31 17:26:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:46,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:26:46,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:26:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:26:46,706 INFO L87 Difference]: Start difference. First operand 381 states and 385 transitions. Second operand has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 54 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:48,290 INFO L93 Difference]: Finished difference Result 714 states and 725 transitions. [2022-01-31 17:26:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:26:48,291 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 54 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 376 [2022-01-31 17:26:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:48,292 INFO L225 Difference]: With dead ends: 714 [2022-01-31 17:26:48,292 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 17:26:48,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:26:48,293 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 678 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:48,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 60 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:26:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 17:26:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2022-01-31 17:26:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 382 states have (on average 1.013089005235602) internal successors, (387), 382 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 392 transitions. [2022-01-31 17:26:48,344 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 392 transitions. Word has length 376 [2022-01-31 17:26:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:48,344 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 392 transitions. [2022-01-31 17:26:48,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 54 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 392 transitions. [2022-01-31 17:26:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-31 17:26:48,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:48,346 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:48,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:26:48,346 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1966186339, now seen corresponding path program 52 times [2022-01-31 17:26:48,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:48,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215428486] [2022-01-31 17:26:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:48,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:48,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:48,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:48,353 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:49,328 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:49,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215428486] [2022-01-31 17:26:49,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215428486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:49,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:49,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:26:49,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385255916] [2022-01-31 17:26:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:26:49,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:26:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:26:49,330 INFO L87 Difference]: Start difference. First operand 388 states and 392 transitions. Second operand has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:50,993 INFO L93 Difference]: Finished difference Result 727 states and 738 transitions. [2022-01-31 17:26:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:26:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-01-31 17:26:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:50,995 INFO L225 Difference]: With dead ends: 727 [2022-01-31 17:26:50,995 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 17:26:50,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:26:50,996 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 807 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:50,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 45 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:26:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 17:26:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-01-31 17:26:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.012853470437018) internal successors, (394), 389 states have internal predecessors, (394), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 399 transitions. [2022-01-31 17:26:51,059 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 399 transitions. Word has length 383 [2022-01-31 17:26:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:51,059 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 399 transitions. [2022-01-31 17:26:51,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 55 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 399 transitions. [2022-01-31 17:26:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 17:26:51,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:51,061 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:51,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:26:51,061 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1353024085, now seen corresponding path program 53 times [2022-01-31 17:26:51,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:51,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401806139] [2022-01-31 17:26:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:51,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:51,063 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:51,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:51,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:52,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:52,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401806139] [2022-01-31 17:26:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [401806139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:52,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:26:52,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596014398] [2022-01-31 17:26:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:52,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:26:52,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:52,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:26:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:26:52,055 INFO L87 Difference]: Start difference. First operand 395 states and 399 transitions. Second operand has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:53,813 INFO L93 Difference]: Finished difference Result 740 states and 751 transitions. [2022-01-31 17:26:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:26:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 17:26:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:53,815 INFO L225 Difference]: With dead ends: 740 [2022-01-31 17:26:53,815 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 17:26:53,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:26:53,816 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 882 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:53,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 40 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:26:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 17:26:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2022-01-31 17:26:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 396 states have (on average 1.0126262626262625) internal successors, (401), 396 states have internal predecessors, (401), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 406 transitions. [2022-01-31 17:26:53,885 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 406 transitions. Word has length 390 [2022-01-31 17:26:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 406 transitions. [2022-01-31 17:26:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 56 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 406 transitions. [2022-01-31 17:26:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-01-31 17:26:53,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:53,888 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:53,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:26:53,888 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:53,888 INFO L85 PathProgramCache]: Analyzing trace with hash 502098647, now seen corresponding path program 54 times [2022-01-31 17:26:53,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:53,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042148168] [2022-01-31 17:26:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:53,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:53,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:53,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:53,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:54,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042148168] [2022-01-31 17:26:54,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042148168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:54,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:54,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:26:54,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860745391] [2022-01-31 17:26:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:54,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:26:54,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:26:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:26:54,912 INFO L87 Difference]: Start difference. First operand 402 states and 406 transitions. Second operand has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 57 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:56,713 INFO L93 Difference]: Finished difference Result 753 states and 764 transitions. [2022-01-31 17:26:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:26:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 57 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-01-31 17:26:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:56,714 INFO L225 Difference]: With dead ends: 753 [2022-01-31 17:26:56,714 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 17:26:56,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:26:56,716 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 786 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:56,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 45 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:26:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 17:26:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 409. [2022-01-31 17:26:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 403 states have (on average 1.0124069478908189) internal successors, (408), 403 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 413 transitions. [2022-01-31 17:26:56,771 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 413 transitions. Word has length 397 [2022-01-31 17:26:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 413 transitions. [2022-01-31 17:26:56,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.293103448275862) internal successors, (75), 57 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 413 transitions. [2022-01-31 17:26:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-01-31 17:26:56,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:56,773 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:26:56,773 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2120275145, now seen corresponding path program 55 times [2022-01-31 17:26:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:56,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589057374] [2022-01-31 17:26:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:56,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:56,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:56,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:56,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:57,839 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589057374] [2022-01-31 17:26:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589057374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:57,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:57,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:26:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809919805] [2022-01-31 17:26:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:57,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:26:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:26:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:26:57,840 INFO L87 Difference]: Start difference. First operand 409 states and 413 transitions. Second operand has 59 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 58 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:59,664 INFO L93 Difference]: Finished difference Result 766 states and 777 transitions. [2022-01-31 17:26:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:26:59,664 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 58 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 404 [2022-01-31 17:26:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:59,665 INFO L225 Difference]: With dead ends: 766 [2022-01-31 17:26:59,665 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 17:26:59,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:26:59,667 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 711 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:59,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 65 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:26:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 17:26:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 416. [2022-01-31 17:26:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0121951219512195) internal successors, (415), 410 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:26:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 420 transitions. [2022-01-31 17:26:59,724 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 420 transitions. Word has length 404 [2022-01-31 17:26:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:59,724 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 420 transitions. [2022-01-31 17:26:59,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 58 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 420 transitions. [2022-01-31 17:26:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:26:59,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:59,726 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:59,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:26:59,726 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -272865205, now seen corresponding path program 56 times [2022-01-31 17:26:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:59,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848001111] [2022-01-31 17:26:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:59,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:59,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:59,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:59,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:00,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:00,787 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848001111] [2022-01-31 17:27:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848001111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:00,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:00,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:27:00,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968943505] [2022-01-31 17:27:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:00,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:27:00,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:00,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:27:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:27:00,788 INFO L87 Difference]: Start difference. First operand 416 states and 420 transitions. Second operand has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 59 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:02,672 INFO L93 Difference]: Finished difference Result 779 states and 790 transitions. [2022-01-31 17:27:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:27:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 59 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:27:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:02,674 INFO L225 Difference]: With dead ends: 779 [2022-01-31 17:27:02,674 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 17:27:02,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:27:02,676 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 756 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:02,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 40 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 17:27:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 423. [2022-01-31 17:27:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.0119904076738608) internal successors, (422), 417 states have internal predecessors, (422), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 427 transitions. [2022-01-31 17:27:02,746 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 427 transitions. Word has length 411 [2022-01-31 17:27:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 427 transitions. [2022-01-31 17:27:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 59 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 427 transitions. [2022-01-31 17:27:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-31 17:27:02,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:02,748 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:02,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:27:02,748 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1261872835, now seen corresponding path program 57 times [2022-01-31 17:27:02,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100382623] [2022-01-31 17:27:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:02,749 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:02,749 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:02,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:02,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:03,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100382623] [2022-01-31 17:27:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100382623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:03,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:03,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:27:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697129044] [2022-01-31 17:27:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:03,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:27:03,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:27:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:27:03,847 INFO L87 Difference]: Start difference. First operand 423 states and 427 transitions. Second operand has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 60 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:05,809 INFO L93 Difference]: Finished difference Result 792 states and 803 transitions. [2022-01-31 17:27:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:27:05,810 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 60 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 418 [2022-01-31 17:27:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:05,811 INFO L225 Difference]: With dead ends: 792 [2022-01-31 17:27:05,811 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 17:27:05,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:27:05,812 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 741 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:05,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 60 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 17:27:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 430. [2022-01-31 17:27:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 1.0117924528301887) internal successors, (429), 424 states have internal predecessors, (429), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 434 transitions. [2022-01-31 17:27:05,876 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 434 transitions. Word has length 418 [2022-01-31 17:27:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:05,876 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 434 transitions. [2022-01-31 17:27:05,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 60 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 434 transitions. [2022-01-31 17:27:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 17:27:05,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:05,877 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:05,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:27:05,878 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1491888193, now seen corresponding path program 58 times [2022-01-31 17:27:05,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:05,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874618481] [2022-01-31 17:27:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:05,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:05,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:05,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:05,891 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:07,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874618481] [2022-01-31 17:27:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874618481] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:07,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:07,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:27:07,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325576084] [2022-01-31 17:27:07,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:27:07,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:27:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:27:07,022 INFO L87 Difference]: Start difference. First operand 430 states and 434 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:09,026 INFO L93 Difference]: Finished difference Result 805 states and 816 transitions. [2022-01-31 17:27:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:27:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-01-31 17:27:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:09,028 INFO L225 Difference]: With dead ends: 805 [2022-01-31 17:27:09,028 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 17:27:09,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:27:09,029 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 795 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:09,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 65 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 17:27:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 437. [2022-01-31 17:27:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 431 states have (on average 1.011600928074246) internal successors, (436), 431 states have internal predecessors, (436), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 441 transitions. [2022-01-31 17:27:09,093 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 441 transitions. Word has length 425 [2022-01-31 17:27:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:09,093 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 441 transitions. [2022-01-31 17:27:09,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 441 transitions. [2022-01-31 17:27:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-01-31 17:27:09,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:09,095 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:09,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:27:09,095 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1232342961, now seen corresponding path program 59 times [2022-01-31 17:27:09,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:09,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542043172] [2022-01-31 17:27:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:09,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:09,096 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:09,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:09,103 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:10,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:10,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542043172] [2022-01-31 17:27:10,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [542043172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:10,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:10,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:27:10,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305890869] [2022-01-31 17:27:10,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:10,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:27:10,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:27:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:27:10,271 INFO L87 Difference]: Start difference. First operand 437 states and 441 transitions. Second operand has 63 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 62 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:12,374 INFO L93 Difference]: Finished difference Result 818 states and 829 transitions. [2022-01-31 17:27:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:27:12,374 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 62 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 432 [2022-01-31 17:27:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:12,375 INFO L225 Difference]: With dead ends: 818 [2022-01-31 17:27:12,375 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 17:27:12,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:27:12,376 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 936 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:12,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 40 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 17:27:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2022-01-31 17:27:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 438 states have (on average 1.0114155251141552) internal successors, (443), 438 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 448 transitions. [2022-01-31 17:27:12,442 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 448 transitions. Word has length 432 [2022-01-31 17:27:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:12,442 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 448 transitions. [2022-01-31 17:27:12,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 62 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 448 transitions. [2022-01-31 17:27:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-01-31 17:27:12,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:12,444 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:12,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:27:12,444 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash -186123981, now seen corresponding path program 60 times [2022-01-31 17:27:12,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:12,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168800841] [2022-01-31 17:27:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:12,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:12,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:12,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:12,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:13,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168800841] [2022-01-31 17:27:13,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [168800841] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:13,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:13,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:27:13,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822384851] [2022-01-31 17:27:13,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:13,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:27:13,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:13,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:27:13,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:27:13,653 INFO L87 Difference]: Start difference. First operand 444 states and 448 transitions. Second operand has 64 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:15,753 INFO L93 Difference]: Finished difference Result 831 states and 842 transitions. [2022-01-31 17:27:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:27:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 439 [2022-01-31 17:27:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:15,754 INFO L225 Difference]: With dead ends: 831 [2022-01-31 17:27:15,754 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 17:27:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:27:15,756 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 816 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:15,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 45 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 17:27:15,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2022-01-31 17:27:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.0112359550561798) internal successors, (450), 445 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 455 transitions. [2022-01-31 17:27:15,825 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 455 transitions. Word has length 439 [2022-01-31 17:27:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:15,826 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 455 transitions. [2022-01-31 17:27:15,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 455 transitions. [2022-01-31 17:27:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 17:27:15,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:15,827 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:15,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:27:15,828 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 511047717, now seen corresponding path program 61 times [2022-01-31 17:27:15,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605193814] [2022-01-31 17:27:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:15,829 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:15,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:15,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:15,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:17,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:17,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605193814] [2022-01-31 17:27:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605193814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:17,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:17,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:27:17,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009719351] [2022-01-31 17:27:17,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:17,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:27:17,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:27:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:27:17,085 INFO L87 Difference]: Start difference. First operand 451 states and 455 transitions. Second operand has 65 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:19,275 INFO L93 Difference]: Finished difference Result 844 states and 855 transitions. [2022-01-31 17:27:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:27:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 17:27:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:19,276 INFO L225 Difference]: With dead ends: 844 [2022-01-31 17:27:19,276 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 17:27:19,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:27:19,278 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 813 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 861 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:19,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 50 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [861 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 17:27:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 458. [2022-01-31 17:27:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 452 states have (on average 1.011061946902655) internal successors, (457), 452 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 462 transitions. [2022-01-31 17:27:19,358 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 462 transitions. Word has length 446 [2022-01-31 17:27:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:19,358 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 462 transitions. [2022-01-31 17:27:19,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 462 transitions. [2022-01-31 17:27:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-01-31 17:27:19,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:19,360 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:19,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:27:19,360 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1095856985, now seen corresponding path program 62 times [2022-01-31 17:27:19,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413285197] [2022-01-31 17:27:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:19,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:19,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:19,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:19,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:20,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:20,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413285197] [2022-01-31 17:27:20,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [413285197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:20,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:20,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:27:20,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799101843] [2022-01-31 17:27:20,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:20,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:27:20,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:27:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:27:20,639 INFO L87 Difference]: Start difference. First operand 458 states and 462 transitions. Second operand has 66 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 65 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:22,882 INFO L93 Difference]: Finished difference Result 857 states and 868 transitions. [2022-01-31 17:27:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:27:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 65 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 453 [2022-01-31 17:27:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:22,883 INFO L225 Difference]: With dead ends: 857 [2022-01-31 17:27:22,883 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 17:27:22,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:27:22,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 855 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:22,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 60 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 17:27:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2022-01-31 17:27:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 459 states have (on average 1.0108932461873639) internal successors, (464), 459 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 469 transitions. [2022-01-31 17:27:22,967 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 469 transitions. Word has length 453 [2022-01-31 17:27:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:22,967 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 469 transitions. [2022-01-31 17:27:22,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 65 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 469 transitions. [2022-01-31 17:27:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-01-31 17:27:22,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:22,969 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:22,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:27:22,969 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash -496758119, now seen corresponding path program 63 times [2022-01-31 17:27:22,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:22,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042934562] [2022-01-31 17:27:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:22,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:22,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:22,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:24,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:24,269 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:24,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042934562] [2022-01-31 17:27:24,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042934562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:24,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:24,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:27:24,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375276204] [2022-01-31 17:27:24,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:24,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:27:24,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:27:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:27:24,271 INFO L87 Difference]: Start difference. First operand 465 states and 469 transitions. Second operand has 67 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 66 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:26,574 INFO L93 Difference]: Finished difference Result 870 states and 881 transitions. [2022-01-31 17:27:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:27:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 66 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 460 [2022-01-31 17:27:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:26,576 INFO L225 Difference]: With dead ends: 870 [2022-01-31 17:27:26,576 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 17:27:26,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:27:26,577 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 831 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:26,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 50 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:27:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 17:27:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 472. [2022-01-31 17:27:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.0107296137339057) internal successors, (471), 466 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 476 transitions. [2022-01-31 17:27:26,653 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 476 transitions. Word has length 460 [2022-01-31 17:27:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:26,653 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 476 transitions. [2022-01-31 17:27:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 66 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 476 transitions. [2022-01-31 17:27:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:27:26,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:26,655 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:26,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:27:26,655 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1583108635, now seen corresponding path program 64 times [2022-01-31 17:27:26,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:26,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699832294] [2022-01-31 17:27:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:26,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:26,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:26,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:26,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:28,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699832294] [2022-01-31 17:27:28,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699832294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:28,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:28,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:27:28,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344420412] [2022-01-31 17:27:28,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:28,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:27:28,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:27:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:27:28,098 INFO L87 Difference]: Start difference. First operand 472 states and 476 transitions. Second operand has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:30,484 INFO L93 Difference]: Finished difference Result 883 states and 894 transitions. [2022-01-31 17:27:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:27:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 17:27:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:30,486 INFO L225 Difference]: With dead ends: 883 [2022-01-31 17:27:30,486 INFO L226 Difference]: Without dead ends: 482 [2022-01-31 17:27:30,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:27:30,487 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 903 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:30,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 65 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-31 17:27:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 479. [2022-01-31 17:27:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 473 states have (on average 1.0105708245243128) internal successors, (478), 473 states have internal predecessors, (478), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 483 transitions. [2022-01-31 17:27:30,566 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 483 transitions. Word has length 467 [2022-01-31 17:27:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:30,567 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 483 transitions. [2022-01-31 17:27:30,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 483 transitions. [2022-01-31 17:27:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-01-31 17:27:30,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:30,569 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:30,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:27:30,569 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1347641101, now seen corresponding path program 65 times [2022-01-31 17:27:30,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:30,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714275220] [2022-01-31 17:27:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:30,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:30,570 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:30,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:30,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:31,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:31,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714275220] [2022-01-31 17:27:31,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [714275220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:31,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:31,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:27:31,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079693420] [2022-01-31 17:27:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:31,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:27:31,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:27:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:27:31,976 INFO L87 Difference]: Start difference. First operand 479 states and 483 transitions. Second operand has 69 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 68 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:34,431 INFO L93 Difference]: Finished difference Result 896 states and 907 transitions. [2022-01-31 17:27:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:27:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 68 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 474 [2022-01-31 17:27:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:34,433 INFO L225 Difference]: With dead ends: 896 [2022-01-31 17:27:34,433 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 17:27:34,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:27:34,435 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 882 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:34,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 60 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 17:27:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2022-01-31 17:27:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.0104166666666667) internal successors, (485), 480 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 490 transitions. [2022-01-31 17:27:34,525 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 490 transitions. Word has length 474 [2022-01-31 17:27:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:34,525 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 490 transitions. [2022-01-31 17:27:34,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 68 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 490 transitions. [2022-01-31 17:27:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-01-31 17:27:34,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:34,527 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:34,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:27:34,527 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -496612977, now seen corresponding path program 66 times [2022-01-31 17:27:34,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:34,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296831579] [2022-01-31 17:27:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:34,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:34,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:34,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:34,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:35,946 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:35,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296831579] [2022-01-31 17:27:35,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296831579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:35,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:35,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:27:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428635097] [2022-01-31 17:27:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:35,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:27:35,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:27:35,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:27:35,948 INFO L87 Difference]: Start difference. First operand 486 states and 490 transitions. Second operand has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 69 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:38,458 INFO L93 Difference]: Finished difference Result 909 states and 920 transitions. [2022-01-31 17:27:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:27:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 69 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 481 [2022-01-31 17:27:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:38,459 INFO L225 Difference]: With dead ends: 909 [2022-01-31 17:27:38,459 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 17:27:38,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:27:38,460 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 834 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:38,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 60 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 17:27:38,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 493. [2022-01-31 17:27:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 487 states have (on average 1.0102669404517455) internal successors, (492), 487 states have internal predecessors, (492), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 497 transitions. [2022-01-31 17:27:38,543 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 497 transitions. Word has length 481 [2022-01-31 17:27:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:38,543 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 497 transitions. [2022-01-31 17:27:38,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 69 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 497 transitions. [2022-01-31 17:27:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-01-31 17:27:38,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:38,545 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:38,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:27:38,545 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1876483457, now seen corresponding path program 67 times [2022-01-31 17:27:38,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711317849] [2022-01-31 17:27:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:38,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:38,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:38,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:38,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:40,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:40,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711317849] [2022-01-31 17:27:40,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1711317849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:40,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:40,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:27:40,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512444552] [2022-01-31 17:27:40,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:40,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:27:40,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:40,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:27:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:27:40,035 INFO L87 Difference]: Start difference. First operand 493 states and 497 transitions. Second operand has 71 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 70 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:42,667 INFO L93 Difference]: Finished difference Result 922 states and 933 transitions. [2022-01-31 17:27:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:27:42,668 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 70 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 488 [2022-01-31 17:27:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:42,669 INFO L225 Difference]: With dead ends: 922 [2022-01-31 17:27:42,669 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 17:27:42,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:27:42,670 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 993 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:42,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 55 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 17:27:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 500. [2022-01-31 17:27:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 494 states have (on average 1.0101214574898785) internal successors, (499), 494 states have internal predecessors, (499), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 504 transitions. [2022-01-31 17:27:42,755 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 504 transitions. Word has length 488 [2022-01-31 17:27:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:42,755 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 504 transitions. [2022-01-31 17:27:42,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 70 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:42,755 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 504 transitions. [2022-01-31 17:27:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 17:27:42,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:42,758 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:27:42,758 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1304523523, now seen corresponding path program 68 times [2022-01-31 17:27:42,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:42,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111214318] [2022-01-31 17:27:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:42,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:42,759 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:42,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:42,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:44,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:44,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111214318] [2022-01-31 17:27:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111214318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:44,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:44,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:27:44,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44948215] [2022-01-31 17:27:44,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:44,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:27:44,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:27:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:27:44,272 INFO L87 Difference]: Start difference. First operand 500 states and 504 transitions. Second operand has 72 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 71 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:46,950 INFO L93 Difference]: Finished difference Result 935 states and 946 transitions. [2022-01-31 17:27:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:27:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 71 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 495 [2022-01-31 17:27:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:46,952 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:27:46,952 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 17:27:46,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:27:46,953 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 906 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:46,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 75 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 17:27:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2022-01-31 17:27:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 501 states have (on average 1.0099800399201597) internal successors, (506), 501 states have internal predecessors, (506), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 511 transitions. [2022-01-31 17:27:47,051 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 511 transitions. Word has length 495 [2022-01-31 17:27:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 511 transitions. [2022-01-31 17:27:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 71 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 511 transitions. [2022-01-31 17:27:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 17:27:47,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:47,054 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:27:47,054 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash -720794123, now seen corresponding path program 69 times [2022-01-31 17:27:47,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:47,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905195930] [2022-01-31 17:27:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:47,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:47,055 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:47,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:47,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:48,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:48,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905195930] [2022-01-31 17:27:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905195930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:48,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:27:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65981678] [2022-01-31 17:27:48,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:48,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:27:48,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:27:48,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:27:48,651 INFO L87 Difference]: Start difference. First operand 507 states and 511 transitions. Second operand has 73 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 72 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:51,367 INFO L93 Difference]: Finished difference Result 948 states and 959 transitions. [2022-01-31 17:27:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:27:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 72 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 502 [2022-01-31 17:27:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:51,369 INFO L225 Difference]: With dead ends: 948 [2022-01-31 17:27:51,369 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 17:27:51,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:27:51,370 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 840 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:51,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 70 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 17:27:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 514. [2022-01-31 17:27:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 508 states have (on average 1.0098425196850394) internal successors, (513), 508 states have internal predecessors, (513), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 518 transitions. [2022-01-31 17:27:51,459 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 518 transitions. Word has length 502 [2022-01-31 17:27:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 518 transitions. [2022-01-31 17:27:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 72 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 518 transitions. [2022-01-31 17:27:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-01-31 17:27:51,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:51,461 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:51,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:27:51,462 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash -673001865, now seen corresponding path program 70 times [2022-01-31 17:27:51,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:51,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356068322] [2022-01-31 17:27:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:51,463 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:51,463 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:51,473 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:53,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:53,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356068322] [2022-01-31 17:27:53,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [356068322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:53,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:53,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:27:53,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599766339] [2022-01-31 17:27:53,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:53,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:27:53,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:27:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:27:53,067 INFO L87 Difference]: Start difference. First operand 514 states and 518 transitions. Second operand has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:55,934 INFO L93 Difference]: Finished difference Result 961 states and 972 transitions. [2022-01-31 17:27:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:27:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 509 [2022-01-31 17:27:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:55,935 INFO L225 Difference]: With dead ends: 961 [2022-01-31 17:27:55,935 INFO L226 Difference]: Without dead ends: 524 [2022-01-31 17:27:55,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:27:55,937 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1062 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:55,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 50 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:27:55,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-31 17:27:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 521. [2022-01-31 17:27:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 515 states have (on average 1.0097087378640777) internal successors, (520), 515 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:27:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 525 transitions. [2022-01-31 17:27:56,029 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 525 transitions. Word has length 509 [2022-01-31 17:27:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:56,029 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 525 transitions. [2022-01-31 17:27:56,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 73 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 525 transitions. [2022-01-31 17:27:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-01-31 17:27:56,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:56,031 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:56,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:27:56,031 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -528846743, now seen corresponding path program 71 times [2022-01-31 17:27:56,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686035451] [2022-01-31 17:27:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:56,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:56,033 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:56,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:56,043 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:57,731 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686035451] [2022-01-31 17:27:57,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686035451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:57,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:57,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:27:57,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330494600] [2022-01-31 17:27:57,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:27:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:27:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:27:57,732 INFO L87 Difference]: Start difference. First operand 521 states and 525 transitions. Second operand has 75 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 74 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:00,664 INFO L93 Difference]: Finished difference Result 974 states and 985 transitions. [2022-01-31 17:28:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:28:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 74 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 516 [2022-01-31 17:28:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:00,666 INFO L225 Difference]: With dead ends: 974 [2022-01-31 17:28:00,666 INFO L226 Difference]: Without dead ends: 531 [2022-01-31 17:28:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:28:00,667 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1008 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1067 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1067 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:00,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 50 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1067 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:28:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-31 17:28:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 528. [2022-01-31 17:28:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0095785440613028) internal successors, (527), 522 states have internal predecessors, (527), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 532 transitions. [2022-01-31 17:28:00,761 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 532 transitions. Word has length 516 [2022-01-31 17:28:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:00,761 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 532 transitions. [2022-01-31 17:28:00,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 74 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 532 transitions. [2022-01-31 17:28:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 17:28:00,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:00,763 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:00,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:28:00,764 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash 750738411, now seen corresponding path program 72 times [2022-01-31 17:28:00,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113361287] [2022-01-31 17:28:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:00,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:00,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:00,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:00,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:02,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:02,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113361287] [2022-01-31 17:28:02,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [113361287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:02,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:02,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:28:02,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912328652] [2022-01-31 17:28:02,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:02,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:28:02,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:28:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:28:02,446 INFO L87 Difference]: Start difference. First operand 528 states and 532 transitions. Second operand has 76 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 75 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:05,416 INFO L93 Difference]: Finished difference Result 987 states and 998 transitions. [2022-01-31 17:28:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:28:05,416 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 75 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 17:28:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:05,417 INFO L225 Difference]: With dead ends: 987 [2022-01-31 17:28:05,418 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 17:28:05,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:28:05,419 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 897 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 955 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 955 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:05,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 70 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [955 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:28:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 17:28:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2022-01-31 17:28:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 529 states have (on average 1.00945179584121) internal successors, (534), 529 states have internal predecessors, (534), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 539 transitions. [2022-01-31 17:28:05,514 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 539 transitions. Word has length 523 [2022-01-31 17:28:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 539 transitions. [2022-01-31 17:28:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 75 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 539 transitions. [2022-01-31 17:28:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 17:28:05,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:05,517 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:05,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:28:05,517 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -12548899, now seen corresponding path program 73 times [2022-01-31 17:28:05,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445701862] [2022-01-31 17:28:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:05,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:05,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:05,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:05,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:07,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:07,223 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445701862] [2022-01-31 17:28:07,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445701862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:07,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:07,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:28:07,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424625638] [2022-01-31 17:28:07,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:07,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:28:07,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:28:07,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:28:07,225 INFO L87 Difference]: Start difference. First operand 535 states and 539 transitions. Second operand has 77 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 76 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:10,293 INFO L93 Difference]: Finished difference Result 1000 states and 1011 transitions. [2022-01-31 17:28:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:28:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 76 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 530 [2022-01-31 17:28:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:10,295 INFO L225 Difference]: With dead ends: 1000 [2022-01-31 17:28:10,295 INFO L226 Difference]: Without dead ends: 545 [2022-01-31 17:28:10,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:28:10,296 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1005 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 1065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:10,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 55 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1065 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:28:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-31 17:28:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 542. [2022-01-31 17:28:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 536 states have (on average 1.0093283582089552) internal successors, (541), 536 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 546 transitions. [2022-01-31 17:28:10,406 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 546 transitions. Word has length 530 [2022-01-31 17:28:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:10,406 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 546 transitions. [2022-01-31 17:28:10,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 76 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 546 transitions. [2022-01-31 17:28:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-01-31 17:28:10,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:10,409 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:28:10,409 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1395909793, now seen corresponding path program 74 times [2022-01-31 17:28:10,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:10,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933013018] [2022-01-31 17:28:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:10,410 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:10,410 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:10,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:12,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:12,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933013018] [2022-01-31 17:28:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [933013018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:12,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:28:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099908979] [2022-01-31 17:28:12,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:12,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:28:12,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:28:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:28:12,181 INFO L87 Difference]: Start difference. First operand 542 states and 546 transitions. Second operand has 78 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 77 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:15,348 INFO L93 Difference]: Finished difference Result 1013 states and 1024 transitions. [2022-01-31 17:28:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:28:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 77 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 537 [2022-01-31 17:28:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:15,350 INFO L225 Difference]: With dead ends: 1013 [2022-01-31 17:28:15,350 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 17:28:15,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:28:15,351 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 1168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1168 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:15,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 55 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1168 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 17:28:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 549. [2022-01-31 17:28:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 543 states have (on average 1.0092081031307552) internal successors, (548), 543 states have internal predecessors, (548), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 553 transitions. [2022-01-31 17:28:15,469 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 553 transitions. Word has length 537 [2022-01-31 17:28:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 553 transitions. [2022-01-31 17:28:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 77 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 553 transitions. [2022-01-31 17:28:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-01-31 17:28:15,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:15,472 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:15,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:28:15,472 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -353318063, now seen corresponding path program 75 times [2022-01-31 17:28:15,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:15,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7494979] [2022-01-31 17:28:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:15,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:15,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:15,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:15,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:17,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7494979] [2022-01-31 17:28:17,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7494979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:17,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:17,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:28:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028349705] [2022-01-31 17:28:17,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:28:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:28:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:28:17,307 INFO L87 Difference]: Start difference. First operand 549 states and 553 transitions. Second operand has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 78 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:20,489 INFO L93 Difference]: Finished difference Result 1026 states and 1037 transitions. [2022-01-31 17:28:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:28:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 78 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 544 [2022-01-31 17:28:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:20,491 INFO L225 Difference]: With dead ends: 1026 [2022-01-31 17:28:20,491 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 17:28:20,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:28:20,492 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1065 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:20,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 45 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:28:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 17:28:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 556. [2022-01-31 17:28:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 560 transitions. [2022-01-31 17:28:20,596 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 560 transitions. Word has length 544 [2022-01-31 17:28:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:20,596 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 560 transitions. [2022-01-31 17:28:20,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 78 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 560 transitions. [2022-01-31 17:28:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2022-01-31 17:28:20,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:20,599 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:20,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:28:20,599 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1392636717, now seen corresponding path program 76 times [2022-01-31 17:28:20,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822689941] [2022-01-31 17:28:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:20,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:20,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:20,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:20,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:22,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:22,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:22,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822689941] [2022-01-31 17:28:22,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822689941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:22,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:22,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:28:22,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132833967] [2022-01-31 17:28:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:22,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:28:22,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:28:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:28:22,487 INFO L87 Difference]: Start difference. First operand 556 states and 560 transitions. Second operand has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:25,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:25,799 INFO L93 Difference]: Finished difference Result 1039 states and 1050 transitions. [2022-01-31 17:28:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:28:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 551 [2022-01-31 17:28:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:25,801 INFO L225 Difference]: With dead ends: 1039 [2022-01-31 17:28:25,801 INFO L226 Difference]: Without dead ends: 566 [2022-01-31 17:28:25,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:28:25,802 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:25,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 50 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-31 17:28:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 563. [2022-01-31 17:28:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.0089766606822261) internal successors, (562), 557 states have internal predecessors, (562), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 567 transitions. [2022-01-31 17:28:25,920 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 567 transitions. Word has length 551 [2022-01-31 17:28:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:25,920 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 567 transitions. [2022-01-31 17:28:25,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2125) internal successors, (97), 79 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 567 transitions. [2022-01-31 17:28:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 17:28:25,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:25,923 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:25,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:28:25,923 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash -375372859, now seen corresponding path program 77 times [2022-01-31 17:28:25,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:25,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582071612] [2022-01-31 17:28:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:25,924 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:25,924 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:25,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:25,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:27,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:27,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582071612] [2022-01-31 17:28:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [582071612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:27,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:27,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:28:27,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196346673] [2022-01-31 17:28:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:27,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:28:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:28:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:28:27,808 INFO L87 Difference]: Start difference. First operand 563 states and 567 transitions. Second operand has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 80 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:31,202 INFO L93 Difference]: Finished difference Result 1052 states and 1063 transitions. [2022-01-31 17:28:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:28:31,202 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 80 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 558 [2022-01-31 17:28:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:31,204 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 17:28:31,204 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 17:28:31,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:28:31,206 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1173 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 1239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1239 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:31,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 50 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1239 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 17:28:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 570. [2022-01-31 17:28:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 564 states have (on average 1.0088652482269505) internal successors, (569), 564 states have internal predecessors, (569), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 574 transitions. [2022-01-31 17:28:31,314 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 574 transitions. Word has length 558 [2022-01-31 17:28:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:31,314 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 574 transitions. [2022-01-31 17:28:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 80 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 574 transitions. [2022-01-31 17:28:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-01-31 17:28:31,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:31,317 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:31,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:28:31,317 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1228263353, now seen corresponding path program 78 times [2022-01-31 17:28:31,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:31,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743662709] [2022-01-31 17:28:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:31,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:31,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:31,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:31,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:33,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:33,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743662709] [2022-01-31 17:28:33,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [743662709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:33,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:33,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:28:33,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990072766] [2022-01-31 17:28:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:33,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:28:33,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:28:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:28:33,255 INFO L87 Difference]: Start difference. First operand 570 states and 574 transitions. Second operand has 82 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 81 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:36,768 INFO L93 Difference]: Finished difference Result 1065 states and 1076 transitions. [2022-01-31 17:28:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:28:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 81 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 565 [2022-01-31 17:28:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:36,770 INFO L225 Difference]: With dead ends: 1065 [2022-01-31 17:28:36,770 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 17:28:36,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:28:36,772 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1311 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 1375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1375 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:36,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1312 Valid, 45 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1375 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 17:28:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 577. [2022-01-31 17:28:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 571 states have (on average 1.0087565674255692) internal successors, (576), 571 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 581 transitions. [2022-01-31 17:28:36,884 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 581 transitions. Word has length 565 [2022-01-31 17:28:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:36,884 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 581 transitions. [2022-01-31 17:28:36,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 81 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 581 transitions. [2022-01-31 17:28:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-01-31 17:28:36,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:36,887 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:36,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:28:36,887 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash 233041465, now seen corresponding path program 79 times [2022-01-31 17:28:36,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:36,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377186584] [2022-01-31 17:28:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:36,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:36,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:36,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:36,901 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:38,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:38,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377186584] [2022-01-31 17:28:38,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377186584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:38,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:38,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:28:38,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201732723] [2022-01-31 17:28:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:38,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:28:38,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:28:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:28:38,893 INFO L87 Difference]: Start difference. First operand 577 states and 581 transitions. Second operand has 83 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 82 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:42,499 INFO L93 Difference]: Finished difference Result 1078 states and 1089 transitions. [2022-01-31 17:28:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:28:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 82 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 572 [2022-01-31 17:28:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:42,502 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 17:28:42,502 INFO L226 Difference]: Without dead ends: 587 [2022-01-31 17:28:42,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:28:42,503 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1071 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:42,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 60 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-31 17:28:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 584. [2022-01-31 17:28:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 578 states have (on average 1.008650519031142) internal successors, (583), 578 states have internal predecessors, (583), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 588 transitions. [2022-01-31 17:28:42,617 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 588 transitions. Word has length 572 [2022-01-31 17:28:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:42,618 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 588 transitions. [2022-01-31 17:28:42,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 82 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 588 transitions. [2022-01-31 17:28:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:28:42,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:42,620 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:42,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:28:42,620 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -937065029, now seen corresponding path program 80 times [2022-01-31 17:28:42,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:42,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844156394] [2022-01-31 17:28:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:42,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:42,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:42,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:42,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:44,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:44,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844156394] [2022-01-31 17:28:44,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [844156394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:44,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:44,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:28:44,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333584916] [2022-01-31 17:28:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:28:44,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:28:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:28:44,678 INFO L87 Difference]: Start difference. First operand 584 states and 588 transitions. Second operand has 84 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 83 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:48,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:48,374 INFO L93 Difference]: Finished difference Result 1091 states and 1102 transitions. [2022-01-31 17:28:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:28:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 83 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-01-31 17:28:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:48,376 INFO L225 Difference]: With dead ends: 1091 [2022-01-31 17:28:48,376 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 17:28:48,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:28:48,377 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1230 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 1297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1297 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:48,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 45 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1297 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:28:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 17:28:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-01-31 17:28:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 585 states have (on average 1.0085470085470085) internal successors, (590), 585 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 595 transitions. [2022-01-31 17:28:48,495 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 595 transitions. Word has length 579 [2022-01-31 17:28:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 595 transitions. [2022-01-31 17:28:48,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 83 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 595 transitions. [2022-01-31 17:28:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 17:28:48,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:48,498 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:48,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:28:48,498 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1993394861, now seen corresponding path program 81 times [2022-01-31 17:28:48,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:48,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044605939] [2022-01-31 17:28:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:48,499 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:48,499 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:48,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:48,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:50,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:50,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:50,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044605939] [2022-01-31 17:28:50,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044605939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:50,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:50,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:28:50,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911921938] [2022-01-31 17:28:50,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:50,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:28:50,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:50,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:28:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:28:50,621 INFO L87 Difference]: Start difference. First operand 591 states and 595 transitions. Second operand has 85 states, 85 states have (on average 1.2) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:54,437 INFO L93 Difference]: Finished difference Result 1104 states and 1115 transitions. [2022-01-31 17:28:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:28:54,438 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.2) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2022-01-31 17:28:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:54,439 INFO L225 Difference]: With dead ends: 1104 [2022-01-31 17:28:54,439 INFO L226 Difference]: Without dead ends: 601 [2022-01-31 17:28:54,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:28:54,440 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1452 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:54,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1453 Valid, 35 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1521 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:28:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-31 17:28:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 598. [2022-01-31 17:28:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 592 states have (on average 1.008445945945946) internal successors, (597), 592 states have internal predecessors, (597), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:28:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 602 transitions. [2022-01-31 17:28:54,560 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 602 transitions. Word has length 586 [2022-01-31 17:28:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:54,560 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 602 transitions. [2022-01-31 17:28:54,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.2) internal successors, (102), 84 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 602 transitions. [2022-01-31 17:28:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-01-31 17:28:54,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:54,563 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:28:54,563 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1819996881, now seen corresponding path program 82 times [2022-01-31 17:28:54,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:54,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473445157] [2022-01-31 17:28:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:54,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:54,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:54,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:54,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:56,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:56,709 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:56,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473445157] [2022-01-31 17:28:56,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473445157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:56,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:56,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:28:56,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300786150] [2022-01-31 17:28:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:56,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:28:56,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:28:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:28:56,711 INFO L87 Difference]: Start difference. First operand 598 states and 602 transitions. Second operand has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:00,575 INFO L93 Difference]: Finished difference Result 1117 states and 1128 transitions. [2022-01-31 17:29:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:29:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 593 [2022-01-31 17:29:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:00,577 INFO L225 Difference]: With dead ends: 1117 [2022-01-31 17:29:00,577 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 17:29:00,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:29:00,579 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1158 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 1226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1226 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:00,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 50 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1226 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:29:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 17:29:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2022-01-31 17:29:00,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 599 states have (on average 1.008347245409015) internal successors, (604), 599 states have internal predecessors, (604), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 609 transitions. [2022-01-31 17:29:00,700 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 609 transitions. Word has length 593 [2022-01-31 17:29:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:00,700 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 609 transitions. [2022-01-31 17:29:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.197674418604651) internal successors, (103), 85 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 609 transitions. [2022-01-31 17:29:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-01-31 17:29:00,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:00,703 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:29:00,703 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1879320287, now seen corresponding path program 83 times [2022-01-31 17:29:00,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:00,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436965528] [2022-01-31 17:29:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:00,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:00,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:00,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:00,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:02,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436965528] [2022-01-31 17:29:02,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436965528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:02,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:29:02,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465721785] [2022-01-31 17:29:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:29:02,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:29:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:29:02,881 INFO L87 Difference]: Start difference. First operand 605 states and 609 transitions. Second operand has 87 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 86 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:06,821 INFO L93 Difference]: Finished difference Result 1130 states and 1141 transitions. [2022-01-31 17:29:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:29:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 86 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 600 [2022-01-31 17:29:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:06,823 INFO L225 Difference]: With dead ends: 1130 [2022-01-31 17:29:06,823 INFO L226 Difference]: Without dead ends: 615 [2022-01-31 17:29:06,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:29:06,825 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1227 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 1295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1295 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:06,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 55 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1295 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:29:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-31 17:29:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 612. [2022-01-31 17:29:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.0082508250825082) internal successors, (611), 606 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 616 transitions. [2022-01-31 17:29:06,961 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 616 transitions. Word has length 600 [2022-01-31 17:29:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:06,961 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 616 transitions. [2022-01-31 17:29:06,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 86 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 616 transitions. [2022-01-31 17:29:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2022-01-31 17:29:06,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:06,964 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:29:06,964 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1075984733, now seen corresponding path program 84 times [2022-01-31 17:29:06,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522315912] [2022-01-31 17:29:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:06,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:06,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:06,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:06,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:09,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:09,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522315912] [2022-01-31 17:29:09,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [522315912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:09,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:09,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:29:09,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896300352] [2022-01-31 17:29:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:09,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:29:09,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:29:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:29:09,179 INFO L87 Difference]: Start difference. First operand 612 states and 616 transitions. Second operand has 88 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:13,256 INFO L93 Difference]: Finished difference Result 1143 states and 1154 transitions. [2022-01-31 17:29:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:29:13,257 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 607 [2022-01-31 17:29:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:13,258 INFO L225 Difference]: With dead ends: 1143 [2022-01-31 17:29:13,258 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 17:29:13,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:29:13,260 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1266 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 1338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:13,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1267 Valid, 65 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1338 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:13,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 17:29:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 619. [2022-01-31 17:29:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 613 states have (on average 1.0081566068515497) internal successors, (618), 613 states have internal predecessors, (618), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 623 transitions. [2022-01-31 17:29:13,387 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 623 transitions. Word has length 607 [2022-01-31 17:29:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:13,387 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 623 transitions. [2022-01-31 17:29:13,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 623 transitions. [2022-01-31 17:29:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-01-31 17:29:13,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:13,390 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:13,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:29:13,390 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:13,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1366956437, now seen corresponding path program 85 times [2022-01-31 17:29:13,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:13,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695853882] [2022-01-31 17:29:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:13,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:13,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:13,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:13,406 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:15,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695853882] [2022-01-31 17:29:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695853882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:15,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:29:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888786300] [2022-01-31 17:29:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:15,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:29:15,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:29:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:29:15,652 INFO L87 Difference]: Start difference. First operand 619 states and 623 transitions. Second operand has 89 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 88 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:19,846 INFO L93 Difference]: Finished difference Result 1156 states and 1167 transitions. [2022-01-31 17:29:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:29:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 88 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 614 [2022-01-31 17:29:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:19,848 INFO L225 Difference]: With dead ends: 1156 [2022-01-31 17:29:19,848 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 17:29:19,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:29:19,850 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1047 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:19,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 60 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:29:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 17:29:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 626. [2022-01-31 17:29:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 620 states have (on average 1.0080645161290323) internal successors, (625), 620 states have internal predecessors, (625), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 630 transitions. [2022-01-31 17:29:19,979 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 630 transitions. Word has length 614 [2022-01-31 17:29:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 630 transitions. [2022-01-31 17:29:19,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 88 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 630 transitions. [2022-01-31 17:29:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-01-31 17:29:19,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:19,983 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:29:19,983 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash 681882135, now seen corresponding path program 86 times [2022-01-31 17:29:19,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:19,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087192900] [2022-01-31 17:29:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:19,984 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:19,984 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:19,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:19,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:22,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:22,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:22,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087192900] [2022-01-31 17:29:22,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087192900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:22,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:22,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:29:22,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550333828] [2022-01-31 17:29:22,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:22,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:29:22,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:29:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:29:22,324 INFO L87 Difference]: Start difference. First operand 626 states and 630 transitions. Second operand has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:26,594 INFO L93 Difference]: Finished difference Result 1169 states and 1180 transitions. [2022-01-31 17:29:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:29:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-01-31 17:29:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:26,596 INFO L225 Difference]: With dead ends: 1169 [2022-01-31 17:29:26,596 INFO L226 Difference]: Without dead ends: 636 [2022-01-31 17:29:26,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:29:26,598 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1323 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:26,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 45 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-31 17:29:26,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 633. [2022-01-31 17:29:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 627 states have (on average 1.0079744816586922) internal successors, (632), 627 states have internal predecessors, (632), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 637 transitions. [2022-01-31 17:29:26,730 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 637 transitions. Word has length 621 [2022-01-31 17:29:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:26,730 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 637 transitions. [2022-01-31 17:29:26,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 89 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 637 transitions. [2022-01-31 17:29:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2022-01-31 17:29:26,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:26,733 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:26,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:29:26,733 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2145422345, now seen corresponding path program 87 times [2022-01-31 17:29:26,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:26,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538333357] [2022-01-31 17:29:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:26,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:26,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:26,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:26,748 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:29,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:29,152 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538333357] [2022-01-31 17:29:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [538333357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:29,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:29:29,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672859262] [2022-01-31 17:29:29,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:29:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:29:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:29:29,154 INFO L87 Difference]: Start difference. First operand 633 states and 637 transitions. Second operand has 91 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 90 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:33,568 INFO L93 Difference]: Finished difference Result 1182 states and 1193 transitions. [2022-01-31 17:29:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:29:33,569 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 90 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 628 [2022-01-31 17:29:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:33,570 INFO L225 Difference]: With dead ends: 1182 [2022-01-31 17:29:33,570 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 17:29:33,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:29:33,575 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1281 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 1356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 45 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1356 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 17:29:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 640. [2022-01-31 17:29:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 634 states have (on average 1.0078864353312302) internal successors, (639), 634 states have internal predecessors, (639), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 644 transitions. [2022-01-31 17:29:33,712 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 644 transitions. Word has length 628 [2022-01-31 17:29:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:33,712 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 644 transitions. [2022-01-31 17:29:33,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 90 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 644 transitions. [2022-01-31 17:29:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-01-31 17:29:33,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:33,715 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:33,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:29:33,716 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash 500092811, now seen corresponding path program 88 times [2022-01-31 17:29:33,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:33,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398381660] [2022-01-31 17:29:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:33,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:33,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:33,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:33,731 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:36,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:36,142 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398381660] [2022-01-31 17:29:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398381660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:36,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:29:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261370542] [2022-01-31 17:29:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:29:36,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:29:36,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:29:36,144 INFO L87 Difference]: Start difference. First operand 640 states and 644 transitions. Second operand has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:40,731 INFO L93 Difference]: Finished difference Result 1195 states and 1206 transitions. [2022-01-31 17:29:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:29:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 635 [2022-01-31 17:29:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:40,733 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 17:29:40,733 INFO L226 Difference]: Without dead ends: 650 [2022-01-31 17:29:40,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:29:40,734 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1233 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:40,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 50 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-31 17:29:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 647. [2022-01-31 17:29:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 641 states have (on average 1.0078003120124805) internal successors, (646), 641 states have internal predecessors, (646), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 651 transitions. [2022-01-31 17:29:40,896 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 651 transitions. Word has length 635 [2022-01-31 17:29:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:40,896 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 651 transitions. [2022-01-31 17:29:40,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.184782608695652) internal successors, (109), 91 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 651 transitions. [2022-01-31 17:29:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2022-01-31 17:29:40,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:40,899 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:40,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:29:40,899 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash -331075459, now seen corresponding path program 89 times [2022-01-31 17:29:40,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574129510] [2022-01-31 17:29:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:40,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:40,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:40,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:40,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:43,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:43,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574129510] [2022-01-31 17:29:43,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [574129510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:43,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:43,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:29:43,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100248829] [2022-01-31 17:29:43,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:43,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:29:43,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:43,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:29:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:29:43,380 INFO L87 Difference]: Start difference. First operand 647 states and 651 transitions. Second operand has 93 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 92 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:48,138 INFO L93 Difference]: Finished difference Result 1208 states and 1219 transitions. [2022-01-31 17:29:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:29:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 92 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 642 [2022-01-31 17:29:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:48,140 INFO L225 Difference]: With dead ends: 1208 [2022-01-31 17:29:48,140 INFO L226 Difference]: Without dead ends: 657 [2022-01-31 17:29:48,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:29:48,142 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1401 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 1478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1478 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1402 Valid, 45 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1478 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-31 17:29:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 654. [2022-01-31 17:29:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 648 states have (on average 1.007716049382716) internal successors, (653), 648 states have internal predecessors, (653), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 658 transitions. [2022-01-31 17:29:48,312 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 658 transitions. Word has length 642 [2022-01-31 17:29:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:48,312 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 658 transitions. [2022-01-31 17:29:48,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 92 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 658 transitions. [2022-01-31 17:29:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2022-01-31 17:29:48,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:48,315 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:48,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:29:48,315 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1546576129, now seen corresponding path program 90 times [2022-01-31 17:29:48,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:48,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718507177] [2022-01-31 17:29:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:48,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:48,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:48,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:48,333 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:50,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:50,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718507177] [2022-01-31 17:29:50,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [718507177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:50,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:50,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:29:50,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593701225] [2022-01-31 17:29:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:50,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:29:50,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:29:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:29:50,885 INFO L87 Difference]: Start difference. First operand 654 states and 658 transitions. Second operand has 94 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 93 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:55,668 INFO L93 Difference]: Finished difference Result 1221 states and 1232 transitions. [2022-01-31 17:29:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:29:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 93 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 649 [2022-01-31 17:29:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:55,670 INFO L225 Difference]: With dead ends: 1221 [2022-01-31 17:29:55,670 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 17:29:55,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:29:55,672 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:55,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 55 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1216 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:29:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 17:29:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 661. [2022-01-31 17:29:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 655 states have (on average 1.0076335877862594) internal successors, (660), 655 states have internal predecessors, (660), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:29:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 665 transitions. [2022-01-31 17:29:55,819 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 665 transitions. Word has length 649 [2022-01-31 17:29:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:55,819 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 665 transitions. [2022-01-31 17:29:55,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 93 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 665 transitions. [2022-01-31 17:29:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-01-31 17:29:55,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:55,822 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:55,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:29:55,822 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1271265551, now seen corresponding path program 91 times [2022-01-31 17:29:55,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:55,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054231147] [2022-01-31 17:29:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:55,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:55,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:55,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:55,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:58,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:58,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054231147] [2022-01-31 17:29:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054231147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:58,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:58,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:29:58,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390537344] [2022-01-31 17:29:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:58,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:29:58,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:29:58,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:29:58,416 INFO L87 Difference]: Start difference. First operand 661 states and 665 transitions. Second operand has 95 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 94 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:03,434 INFO L93 Difference]: Finished difference Result 1234 states and 1245 transitions. [2022-01-31 17:30:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:30:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 94 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 656 [2022-01-31 17:30:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:03,435 INFO L225 Difference]: With dead ends: 1234 [2022-01-31 17:30:03,435 INFO L226 Difference]: Without dead ends: 671 [2022-01-31 17:30:03,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:30:03,437 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1344 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:03,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 50 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:30:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-31 17:30:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 668. [2022-01-31 17:30:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 662 states have (on average 1.0075528700906344) internal successors, (667), 662 states have internal predecessors, (667), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 672 transitions. [2022-01-31 17:30:03,609 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 672 transitions. Word has length 656 [2022-01-31 17:30:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:03,610 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 672 transitions. [2022-01-31 17:30:03,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 94 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 672 transitions. [2022-01-31 17:30:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-31 17:30:03,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:03,613 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:03,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:30:03,613 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1281318797, now seen corresponding path program 92 times [2022-01-31 17:30:03,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:03,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646150938] [2022-01-31 17:30:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:03,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:03,615 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:03,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:03,631 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:06,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:06,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:06,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646150938] [2022-01-31 17:30:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646150938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:06,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:06,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:30:06,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239701727] [2022-01-31 17:30:06,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:30:06,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:30:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:30:06,288 INFO L87 Difference]: Start difference. First operand 668 states and 672 transitions. Second operand has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:12,005 INFO L93 Difference]: Finished difference Result 1247 states and 1258 transitions. [2022-01-31 17:30:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:30:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-01-31 17:30:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:12,007 INFO L225 Difference]: With dead ends: 1247 [2022-01-31 17:30:12,007 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 17:30:12,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:30:12,008 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1374 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 1452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1452 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:12,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 30 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1452 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:30:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 17:30:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2022-01-31 17:30:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 669 states have (on average 1.007473841554559) internal successors, (674), 669 states have internal predecessors, (674), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 679 transitions. [2022-01-31 17:30:12,181 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 679 transitions. Word has length 663 [2022-01-31 17:30:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:12,181 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 679 transitions. [2022-01-31 17:30:12,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 95 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 679 transitions. [2022-01-31 17:30:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2022-01-31 17:30:12,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:12,185 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:12,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:30:12,185 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2116612251, now seen corresponding path program 93 times [2022-01-31 17:30:12,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:12,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763226487] [2022-01-31 17:30:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:12,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:12,187 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:12,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:12,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:14,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:14,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:14,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763226487] [2022-01-31 17:30:14,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [763226487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:14,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:14,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:30:14,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19287707] [2022-01-31 17:30:14,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:14,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:30:14,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:30:14,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:30:14,891 INFO L87 Difference]: Start difference. First operand 675 states and 679 transitions. Second operand has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 96 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:19,940 INFO L93 Difference]: Finished difference Result 1260 states and 1271 transitions. [2022-01-31 17:30:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:30:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 96 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 670 [2022-01-31 17:30:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:19,941 INFO L225 Difference]: With dead ends: 1260 [2022-01-31 17:30:19,941 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 17:30:19,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:30:19,943 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1569 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 1650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1650 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:19,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 45 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1650 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:30:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 17:30:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2022-01-31 17:30:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 676 states have (on average 1.007396449704142) internal successors, (681), 676 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 686 transitions. [2022-01-31 17:30:20,099 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 686 transitions. Word has length 670 [2022-01-31 17:30:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:20,100 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 686 transitions. [2022-01-31 17:30:20,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 96 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 686 transitions. [2022-01-31 17:30:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2022-01-31 17:30:20,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:20,103 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:20,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:30:20,103 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2058507239, now seen corresponding path program 94 times [2022-01-31 17:30:20,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333737571] [2022-01-31 17:30:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:20,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:20,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:20,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:20,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:22,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:22,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333737571] [2022-01-31 17:30:22,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [333737571] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:22,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:22,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:30:22,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310062877] [2022-01-31 17:30:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:30:22,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:30:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:30:22,872 INFO L87 Difference]: Start difference. First operand 682 states and 686 transitions. Second operand has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:28,083 INFO L93 Difference]: Finished difference Result 1273 states and 1284 transitions. [2022-01-31 17:30:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:30:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 677 [2022-01-31 17:30:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:28,084 INFO L225 Difference]: With dead ends: 1273 [2022-01-31 17:30:28,084 INFO L226 Difference]: Without dead ends: 692 [2022-01-31 17:30:28,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:30:28,085 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1326 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:28,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 70 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1405 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:30:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-01-31 17:30:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 689. [2022-01-31 17:30:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 683 states have (on average 1.007320644216691) internal successors, (688), 683 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 693 transitions. [2022-01-31 17:30:28,248 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 693 transitions. Word has length 677 [2022-01-31 17:30:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:28,248 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 693 transitions. [2022-01-31 17:30:28,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 97 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 693 transitions. [2022-01-31 17:30:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2022-01-31 17:30:28,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:28,252 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:28,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:30:28,252 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash -877639207, now seen corresponding path program 95 times [2022-01-31 17:30:28,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236334239] [2022-01-31 17:30:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:28,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:28,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:28,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:28,280 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:31,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236334239] [2022-01-31 17:30:31,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236334239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:31,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:31,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:30:31,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684855411] [2022-01-31 17:30:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:31,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:30:31,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:30:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:30:31,047 INFO L87 Difference]: Start difference. First operand 689 states and 693 transitions. Second operand has 99 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 98 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:36,334 INFO L93 Difference]: Finished difference Result 1286 states and 1297 transitions. [2022-01-31 17:30:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:30:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 98 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 684 [2022-01-31 17:30:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:36,335 INFO L225 Difference]: With dead ends: 1286 [2022-01-31 17:30:36,335 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 17:30:36,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:30:36,337 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1461 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:36,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 45 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:30:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 17:30:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 696. [2022-01-31 17:30:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.0072463768115942) internal successors, (695), 690 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 700 transitions. [2022-01-31 17:30:36,520 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 700 transitions. Word has length 684 [2022-01-31 17:30:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:36,521 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 700 transitions. [2022-01-31 17:30:36,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 98 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 700 transitions. [2022-01-31 17:30:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-01-31 17:30:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:36,524 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:36,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:30:36,525 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1694811813, now seen corresponding path program 96 times [2022-01-31 17:30:36,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634145229] [2022-01-31 17:30:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:36,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:36,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:36,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:36,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:39,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:39,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634145229] [2022-01-31 17:30:39,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634145229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:39,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:39,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:30:39,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614866387] [2022-01-31 17:30:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:39,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:30:39,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:30:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:30:39,377 INFO L87 Difference]: Start difference. First operand 696 states and 700 transitions. Second operand has 100 states, 100 states have (on average 1.17) internal successors, (117), 99 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:44,751 INFO L93 Difference]: Finished difference Result 1299 states and 1310 transitions. [2022-01-31 17:30:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:30:44,752 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.17) internal successors, (117), 99 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 691 [2022-01-31 17:30:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:44,753 INFO L225 Difference]: With dead ends: 1299 [2022-01-31 17:30:44,753 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 17:30:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:30:44,755 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1509 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 1593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1593 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:44,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 50 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1593 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:30:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 17:30:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 703. [2022-01-31 17:30:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 697 states have (on average 1.007173601147776) internal successors, (702), 697 states have internal predecessors, (702), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 707 transitions. [2022-01-31 17:30:44,937 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 707 transitions. Word has length 691 [2022-01-31 17:30:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:44,938 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 707 transitions. [2022-01-31 17:30:44,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.17) internal successors, (117), 99 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 707 transitions. [2022-01-31 17:30:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-01-31 17:30:44,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:44,941 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:44,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:30:44,941 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash 349877837, now seen corresponding path program 97 times [2022-01-31 17:30:44,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:44,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154384865] [2022-01-31 17:30:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:44,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:44,943 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:44,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:44,962 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:47,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154384865] [2022-01-31 17:30:47,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154384865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:47,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:30:47,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960258687] [2022-01-31 17:30:47,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:30:47,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:30:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:30:47,912 INFO L87 Difference]: Start difference. First operand 703 states and 707 transitions. Second operand has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:30:53,632 INFO L93 Difference]: Finished difference Result 1312 states and 1323 transitions. [2022-01-31 17:30:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:30:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 698 [2022-01-31 17:30:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:30:53,633 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 17:30:53,633 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 17:30:53,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:30:53,635 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1590 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 1675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1675 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:30:53,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 50 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1675 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:30:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 17:30:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 710. [2022-01-31 17:30:53,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 704 states have (on average 1.0071022727272727) internal successors, (709), 704 states have internal predecessors, (709), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:30:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 714 transitions. [2022-01-31 17:30:53,805 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 714 transitions. Word has length 698 [2022-01-31 17:30:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:30:53,805 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 714 transitions. [2022-01-31 17:30:53,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 100 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:30:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 714 transitions. [2022-01-31 17:30:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2022-01-31 17:30:53,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:30:53,809 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:30:53,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:30:53,809 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:30:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:30:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1794134223, now seen corresponding path program 98 times [2022-01-31 17:30:53,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:30:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630645955] [2022-01-31 17:30:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:30:53,810 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:30:53,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:30:53,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:30:53,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:30:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:30:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:30:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:30:56,777 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:30:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630645955] [2022-01-31 17:30:56,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630645955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:30:56,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:30:56,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:30:56,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545016292] [2022-01-31 17:30:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:30:56,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:30:56,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:30:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:30:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:30:56,780 INFO L87 Difference]: Start difference. First operand 710 states and 714 transitions. Second operand has 102 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:02,579 INFO L93 Difference]: Finished difference Result 1325 states and 1336 transitions. [2022-01-31 17:31:02,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:31:02,579 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 705 [2022-01-31 17:31:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:02,580 INFO L225 Difference]: With dead ends: 1325 [2022-01-31 17:31:02,580 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 17:31:02,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:31:02,582 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1800 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 1886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1886 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:02,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 45 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1886 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:31:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 17:31:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 717. [2022-01-31 17:31:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 711 states have (on average 1.0070323488045008) internal successors, (716), 711 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 721 transitions. [2022-01-31 17:31:02,771 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 721 transitions. Word has length 705 [2022-01-31 17:31:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:02,771 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 721 transitions. [2022-01-31 17:31:02,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1666666666666667) internal successors, (119), 101 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 721 transitions. [2022-01-31 17:31:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2022-01-31 17:31:02,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:02,774 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:02,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:31:02,775 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash 753620161, now seen corresponding path program 99 times [2022-01-31 17:31:02,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:02,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912412413] [2022-01-31 17:31:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:02,776 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:02,776 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:02,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:02,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:05,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:05,797 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:05,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912412413] [2022-01-31 17:31:05,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1912412413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:05,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:31:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895893247] [2022-01-31 17:31:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:05,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:31:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:31:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:31:05,800 INFO L87 Difference]: Start difference. First operand 717 states and 721 transitions. Second operand has 103 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 102 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:11,649 INFO L93 Difference]: Finished difference Result 1338 states and 1349 transitions. [2022-01-31 17:31:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:31:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 102 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 712 [2022-01-31 17:31:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:11,650 INFO L225 Difference]: With dead ends: 1338 [2022-01-31 17:31:11,650 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 17:31:11,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:31:11,652 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1377 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:11,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1378 Valid, 55 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:31:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 17:31:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 724. [2022-01-31 17:31:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 718 states have (on average 1.0069637883008355) internal successors, (723), 718 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 728 transitions. [2022-01-31 17:31:11,845 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 728 transitions. Word has length 712 [2022-01-31 17:31:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:11,845 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 728 transitions. [2022-01-31 17:31:11,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 102 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 728 transitions. [2022-01-31 17:31:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2022-01-31 17:31:11,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:11,849 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:11,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:31:11,849 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 898013763, now seen corresponding path program 100 times [2022-01-31 17:31:11,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:11,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771213648] [2022-01-31 17:31:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:11,850 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:11,850 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:11,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:11,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:14,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:14,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:14,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771213648] [2022-01-31 17:31:14,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771213648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:14,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:14,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:31:14,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697316578] [2022-01-31 17:31:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:14,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:31:14,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:31:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:31:14,952 INFO L87 Difference]: Start difference. First operand 724 states and 728 transitions. Second operand has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:21,009 INFO L93 Difference]: Finished difference Result 1351 states and 1362 transitions. [2022-01-31 17:31:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:31:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 719 [2022-01-31 17:31:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:21,011 INFO L225 Difference]: With dead ends: 1351 [2022-01-31 17:31:21,011 INFO L226 Difference]: Without dead ends: 734 [2022-01-31 17:31:21,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:31:21,017 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1653 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 1741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1741 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:21,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 55 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1741 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:31:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-31 17:31:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 731. [2022-01-31 17:31:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 725 states have (on average 1.006896551724138) internal successors, (730), 725 states have internal predecessors, (730), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 735 transitions. [2022-01-31 17:31:21,211 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 735 transitions. Word has length 719 [2022-01-31 17:31:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:21,211 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 735 transitions. [2022-01-31 17:31:21,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 103 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 735 transitions. [2022-01-31 17:31:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-01-31 17:31:21,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:21,215 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:21,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:31:21,215 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:21,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1878467893, now seen corresponding path program 101 times [2022-01-31 17:31:21,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:21,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634536545] [2022-01-31 17:31:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:21,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:21,216 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:21,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:21,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:24,339 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634536545] [2022-01-31 17:31:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [634536545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:24,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:24,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:31:24,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028403839] [2022-01-31 17:31:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:24,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:31:24,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:31:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:31:24,341 INFO L87 Difference]: Start difference. First operand 731 states and 735 transitions. Second operand has 105 states, 105 states have (on average 1.161904761904762) internal successors, (122), 104 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:30,435 INFO L93 Difference]: Finished difference Result 1364 states and 1375 transitions. [2022-01-31 17:31:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:31:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.161904761904762) internal successors, (122), 104 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 726 [2022-01-31 17:31:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:30,437 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 17:31:30,437 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 17:31:30,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:31:30,439 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1698 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 1784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1784 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:30,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 40 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1784 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:31:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 17:31:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 738. [2022-01-31 17:31:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.0068306010928962) internal successors, (737), 732 states have internal predecessors, (737), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 742 transitions. [2022-01-31 17:31:30,635 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 742 transitions. Word has length 726 [2022-01-31 17:31:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:30,635 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 742 transitions. [2022-01-31 17:31:30,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.161904761904762) internal successors, (122), 104 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 742 transitions. [2022-01-31 17:31:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2022-01-31 17:31:30,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:30,639 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:31:30,639 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2050168247, now seen corresponding path program 102 times [2022-01-31 17:31:30,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:30,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091048258] [2022-01-31 17:31:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:30,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:30,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:30,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:30,660 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:33,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091048258] [2022-01-31 17:31:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091048258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:33,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:33,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:31:33,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942457792] [2022-01-31 17:31:33,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:33,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:31:33,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:31:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:31:33,830 INFO L87 Difference]: Start difference. First operand 738 states and 742 transitions. Second operand has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 105 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:40,067 INFO L93 Difference]: Finished difference Result 1377 states and 1388 transitions. [2022-01-31 17:31:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:31:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 105 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 733 [2022-01-31 17:31:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:40,069 INFO L225 Difference]: With dead ends: 1377 [2022-01-31 17:31:40,069 INFO L226 Difference]: Without dead ends: 748 [2022-01-31 17:31:40,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:31:40,071 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1470 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1561 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:40,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 65 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1561 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:31:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-31 17:31:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 745. [2022-01-31 17:31:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 739 states have (on average 1.006765899864682) internal successors, (744), 739 states have internal predecessors, (744), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 749 transitions. [2022-01-31 17:31:40,276 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 749 transitions. Word has length 733 [2022-01-31 17:31:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:40,276 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 749 transitions. [2022-01-31 17:31:40,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 105 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 749 transitions. [2022-01-31 17:31:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 741 [2022-01-31 17:31:40,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:40,279 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:40,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:31:40,280 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 110307241, now seen corresponding path program 103 times [2022-01-31 17:31:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882219096] [2022-01-31 17:31:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:40,281 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:40,281 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:40,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:40,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:43,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:43,537 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:43,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882219096] [2022-01-31 17:31:43,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882219096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:43,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:43,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:31:43,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826988991] [2022-01-31 17:31:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:43,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:31:43,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:31:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:31:43,540 INFO L87 Difference]: Start difference. First operand 745 states and 749 transitions. Second operand has 107 states, 107 states have (on average 1.158878504672897) internal successors, (124), 106 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:49,852 INFO L93 Difference]: Finished difference Result 1390 states and 1401 transitions. [2022-01-31 17:31:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:31:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.158878504672897) internal successors, (124), 106 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 740 [2022-01-31 17:31:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:49,853 INFO L225 Difference]: With dead ends: 1390 [2022-01-31 17:31:49,853 INFO L226 Difference]: Without dead ends: 755 [2022-01-31 17:31:49,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:31:49,855 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1698 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1786 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:49,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 50 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1786 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:31:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-31 17:31:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2022-01-31 17:31:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.0067024128686326) internal successors, (751), 746 states have internal predecessors, (751), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 756 transitions. [2022-01-31 17:31:50,043 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 756 transitions. Word has length 740 [2022-01-31 17:31:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:50,044 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 756 transitions. [2022-01-31 17:31:50,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.158878504672897) internal successors, (124), 106 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 756 transitions. [2022-01-31 17:31:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:31:50,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:50,047 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:31:50,047 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 753582891, now seen corresponding path program 104 times [2022-01-31 17:31:50,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007614046] [2022-01-31 17:31:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:50,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:50,048 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:50,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:31:50,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:31:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:53,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:31:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:31:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:31:53,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:31:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007614046] [2022-01-31 17:31:53,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007614046] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:31:53,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:31:53,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:31:53,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792817398] [2022-01-31 17:31:53,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:31:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:31:53,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:31:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:31:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:31:53,358 INFO L87 Difference]: Start difference. First operand 752 states and 756 transitions. Second operand has 108 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:31:59,774 INFO L93 Difference]: Finished difference Result 1403 states and 1414 transitions. [2022-01-31 17:31:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:31:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 17:31:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:31:59,775 INFO L225 Difference]: With dead ends: 1403 [2022-01-31 17:31:59,775 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 17:31:59,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:31:59,777 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1581 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:31:59,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 45 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:31:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 17:31:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 759. [2022-01-31 17:31:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 753 states have (on average 1.0066401062416999) internal successors, (758), 753 states have internal predecessors, (758), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:31:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 763 transitions. [2022-01-31 17:31:59,989 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 763 transitions. Word has length 747 [2022-01-31 17:31:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:31:59,989 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 763 transitions. [2022-01-31 17:31:59,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:31:59,989 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 763 transitions. [2022-01-31 17:31:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2022-01-31 17:31:59,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:31:59,993 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:31:59,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:31:59,993 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:31:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:31:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash 634674205, now seen corresponding path program 105 times [2022-01-31 17:31:59,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:31:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843341345] [2022-01-31 17:31:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:31:59,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:31:59,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:31:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:00,015 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:03,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:03,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843341345] [2022-01-31 17:32:03,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843341345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:03,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:03,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:32:03,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999573585] [2022-01-31 17:32:03,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:03,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:32:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:32:03,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:32:03,369 INFO L87 Difference]: Start difference. First operand 759 states and 763 transitions. Second operand has 109 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:09,854 INFO L93 Difference]: Finished difference Result 1416 states and 1427 transitions. [2022-01-31 17:32:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:32:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 754 [2022-01-31 17:32:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:09,855 INFO L225 Difference]: With dead ends: 1416 [2022-01-31 17:32:09,855 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 17:32:09,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:32:09,857 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1545 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 1637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1637 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:09,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 50 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1637 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:32:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 17:32:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 766. [2022-01-31 17:32:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 760 states have (on average 1.006578947368421) internal successors, (765), 760 states have internal predecessors, (765), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 770 transitions. [2022-01-31 17:32:10,071 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 770 transitions. Word has length 754 [2022-01-31 17:32:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:10,071 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 770 transitions. [2022-01-31 17:32:10,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 770 transitions. [2022-01-31 17:32:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-01-31 17:32:10,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:10,075 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:32:10,075 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -165502305, now seen corresponding path program 106 times [2022-01-31 17:32:10,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781002990] [2022-01-31 17:32:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:10,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:10,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:10,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:10,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:13,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:13,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781002990] [2022-01-31 17:32:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781002990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:13,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:13,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:32:13,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449369968] [2022-01-31 17:32:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:13,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:32:13,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:32:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:32:13,500 INFO L87 Difference]: Start difference. First operand 766 states and 770 transitions. Second operand has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:20,321 INFO L93 Difference]: Finished difference Result 1429 states and 1440 transitions. [2022-01-31 17:32:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:32:20,322 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 761 [2022-01-31 17:32:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:20,323 INFO L225 Difference]: With dead ends: 1429 [2022-01-31 17:32:20,323 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 17:32:20,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:32:20,325 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1749 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1842 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:20,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 50 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1842 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:32:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 17:32:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 773. [2022-01-31 17:32:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 767 states have (on average 1.0065189048239895) internal successors, (772), 767 states have internal predecessors, (772), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 777 transitions. [2022-01-31 17:32:20,542 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 777 transitions. Word has length 761 [2022-01-31 17:32:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:20,542 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 777 transitions. [2022-01-31 17:32:20,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 109 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 777 transitions. [2022-01-31 17:32:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2022-01-31 17:32:20,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:20,546 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:20,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:32:20,546 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1330627217, now seen corresponding path program 107 times [2022-01-31 17:32:20,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887953459] [2022-01-31 17:32:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:20,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:20,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:20,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:20,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:24,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:24,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887953459] [2022-01-31 17:32:24,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887953459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:24,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:24,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:32:24,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824466333] [2022-01-31 17:32:24,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:24,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:32:24,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:32:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:32:24,036 INFO L87 Difference]: Start difference. First operand 773 states and 777 transitions. Second operand has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 110 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:31,036 INFO L93 Difference]: Finished difference Result 1442 states and 1453 transitions. [2022-01-31 17:32:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:32:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 110 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 768 [2022-01-31 17:32:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:31,037 INFO L225 Difference]: With dead ends: 1442 [2022-01-31 17:32:31,037 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 17:32:31,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:32:31,040 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1749 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 1844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1844 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:31,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 55 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1844 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:32:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 17:32:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 780. [2022-01-31 17:32:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 774 states have (on average 1.0064599483204135) internal successors, (779), 774 states have internal predecessors, (779), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 784 transitions. [2022-01-31 17:32:31,259 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 784 transitions. Word has length 768 [2022-01-31 17:32:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:31,259 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 784 transitions. [2022-01-31 17:32:31,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 110 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 784 transitions. [2022-01-31 17:32:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2022-01-31 17:32:31,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:31,263 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:31,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:32:31,263 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1926214675, now seen corresponding path program 108 times [2022-01-31 17:32:31,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:31,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615215875] [2022-01-31 17:32:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:31,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:31,265 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:31,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:31,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:34,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:34,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:34,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615215875] [2022-01-31 17:32:34,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [615215875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:34,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:34,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:32:34,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293441421] [2022-01-31 17:32:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:32:34,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:32:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:32:34,813 INFO L87 Difference]: Start difference. First operand 780 states and 784 transitions. Second operand has 112 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 111 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:42,024 INFO L93 Difference]: Finished difference Result 1455 states and 1466 transitions. [2022-01-31 17:32:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:32:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 111 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 775 [2022-01-31 17:32:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:42,025 INFO L225 Difference]: With dead ends: 1455 [2022-01-31 17:32:42,025 INFO L226 Difference]: Without dead ends: 790 [2022-01-31 17:32:42,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:32:42,027 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1860 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 1956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1956 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:42,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 45 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1956 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:32:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-31 17:32:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 787. [2022-01-31 17:32:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 781 states have (on average 1.0064020486555698) internal successors, (786), 781 states have internal predecessors, (786), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 791 transitions. [2022-01-31 17:32:42,234 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 791 transitions. Word has length 775 [2022-01-31 17:32:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:42,234 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 791 transitions. [2022-01-31 17:32:42,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 111 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 791 transitions. [2022-01-31 17:32:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-01-31 17:32:42,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:42,238 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:42,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:32:42,238 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1860543739, now seen corresponding path program 109 times [2022-01-31 17:32:42,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214323429] [2022-01-31 17:32:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:42,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:42,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:42,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:42,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:45,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:45,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214323429] [2022-01-31 17:32:45,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214323429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:45,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:45,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:32:45,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502792599] [2022-01-31 17:32:45,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:45,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:32:45,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:32:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:32:45,866 INFO L87 Difference]: Start difference. First operand 787 states and 791 transitions. Second operand has 113 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 112 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:32:52,999 INFO L93 Difference]: Finished difference Result 1468 states and 1479 transitions. [2022-01-31 17:32:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:32:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 112 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 782 [2022-01-31 17:32:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:32:53,000 INFO L225 Difference]: With dead ends: 1468 [2022-01-31 17:32:53,000 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 17:32:53,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:32:53,002 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1542 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:32:53,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 60 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:32:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 17:32:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 794. [2022-01-31 17:32:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 788 states have (on average 1.0063451776649746) internal successors, (793), 788 states have internal predecessors, (793), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:32:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 798 transitions. [2022-01-31 17:32:53,229 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 798 transitions. Word has length 782 [2022-01-31 17:32:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:32:53,229 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 798 transitions. [2022-01-31 17:32:53,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 112 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:32:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 798 transitions. [2022-01-31 17:32:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-01-31 17:32:53,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:32:53,233 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:32:53,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:32:53,233 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:32:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:32:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1952905095, now seen corresponding path program 110 times [2022-01-31 17:32:53,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:32:53,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400732996] [2022-01-31 17:32:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:32:53,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:32:53,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:32:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:32:53,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:32:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:32:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:32:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:32:56,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:32:56,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400732996] [2022-01-31 17:32:56,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400732996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:32:56,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:32:56,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:32:56,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585125046] [2022-01-31 17:32:56,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:32:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:32:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:32:56,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:32:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:32:56,896 INFO L87 Difference]: Start difference. First operand 794 states and 798 transitions. Second operand has 114 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:04,246 INFO L93 Difference]: Finished difference Result 1481 states and 1492 transitions. [2022-01-31 17:33:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:33:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 789 [2022-01-31 17:33:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:04,247 INFO L225 Difference]: With dead ends: 1481 [2022-01-31 17:33:04,247 INFO L226 Difference]: Without dead ends: 804 [2022-01-31 17:33:04,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:33:04,250 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2250 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 2346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2346 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:04,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 35 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2346 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:33:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-31 17:33:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 801. [2022-01-31 17:33:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 795 states have (on average 1.0062893081761006) internal successors, (800), 795 states have internal predecessors, (800), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 805 transitions. [2022-01-31 17:33:04,465 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 805 transitions. Word has length 789 [2022-01-31 17:33:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:04,465 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 805 transitions. [2022-01-31 17:33:04,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 805 transitions. [2022-01-31 17:33:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2022-01-31 17:33:04,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:04,469 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:04,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:33:04,469 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash -976673415, now seen corresponding path program 111 times [2022-01-31 17:33:04,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:04,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193355483] [2022-01-31 17:33:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:04,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:04,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:04,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:04,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:08,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:08,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:08,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193355483] [2022-01-31 17:33:08,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193355483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:08,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:08,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:33:08,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637603323] [2022-01-31 17:33:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:08,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:33:08,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:33:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:33:08,212 INFO L87 Difference]: Start difference. First operand 801 states and 805 transitions. Second operand has 115 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 114 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:15,762 INFO L93 Difference]: Finished difference Result 1494 states and 1505 transitions. [2022-01-31 17:33:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:33:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 114 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 796 [2022-01-31 17:33:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:15,764 INFO L225 Difference]: With dead ends: 1494 [2022-01-31 17:33:15,764 INFO L226 Difference]: Without dead ends: 811 [2022-01-31 17:33:15,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:33:15,767 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1827 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 1925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1925 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:15,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 65 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1925 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:33:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-31 17:33:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 808. [2022-01-31 17:33:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 802 states have (on average 1.0062344139650872) internal successors, (807), 802 states have internal predecessors, (807), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 812 transitions. [2022-01-31 17:33:15,986 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 812 transitions. Word has length 796 [2022-01-31 17:33:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:15,986 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 812 transitions. [2022-01-31 17:33:15,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 114 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 812 transitions. [2022-01-31 17:33:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2022-01-31 17:33:15,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:15,991 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:15,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:33:15,991 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1088253179, now seen corresponding path program 112 times [2022-01-31 17:33:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:15,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602319536] [2022-01-31 17:33:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:15,992 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:15,992 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:15,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:16,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:19,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602319536] [2022-01-31 17:33:19,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [602319536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:19,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:19,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:33:19,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470441916] [2022-01-31 17:33:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:19,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:33:19,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:33:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:33:19,985 INFO L87 Difference]: Start difference. First operand 808 states and 812 transitions. Second operand has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:27,773 INFO L93 Difference]: Finished difference Result 1507 states and 1518 transitions. [2022-01-31 17:33:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:33:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 803 [2022-01-31 17:33:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:27,774 INFO L225 Difference]: With dead ends: 1507 [2022-01-31 17:33:27,774 INFO L226 Difference]: Without dead ends: 818 [2022-01-31 17:33:27,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:33:27,776 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1908 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 2005 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1909 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2005 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:27,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1909 Valid, 50 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2005 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:33:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-31 17:33:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 815. [2022-01-31 17:33:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 809 states have (on average 1.0061804697156984) internal successors, (814), 809 states have internal predecessors, (814), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 819 transitions. [2022-01-31 17:33:28,000 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 819 transitions. Word has length 803 [2022-01-31 17:33:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:28,001 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 819 transitions. [2022-01-31 17:33:28,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 819 transitions. [2022-01-31 17:33:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2022-01-31 17:33:28,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:28,005 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:28,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:33:28,005 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash -730783251, now seen corresponding path program 113 times [2022-01-31 17:33:28,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:28,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717655303] [2022-01-31 17:33:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:28,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:28,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:28,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:28,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:31,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:31,873 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:31,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717655303] [2022-01-31 17:33:31,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717655303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:31,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:31,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:33:31,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020642218] [2022-01-31 17:33:31,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:31,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:33:31,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:33:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:33:31,876 INFO L87 Difference]: Start difference. First operand 815 states and 819 transitions. Second operand has 117 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 116 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:39,663 INFO L93 Difference]: Finished difference Result 1520 states and 1531 transitions. [2022-01-31 17:33:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:33:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 116 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 810 [2022-01-31 17:33:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:39,664 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 17:33:39,664 INFO L226 Difference]: Without dead ends: 825 [2022-01-31 17:33:39,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:33:39,666 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1647 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 1748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1748 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:39,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 60 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1748 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:33:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-31 17:33:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 822. [2022-01-31 17:33:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 816 states have (on average 1.0061274509803921) internal successors, (821), 816 states have internal predecessors, (821), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 826 transitions. [2022-01-31 17:33:39,891 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 826 transitions. Word has length 810 [2022-01-31 17:33:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:39,891 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 826 transitions. [2022-01-31 17:33:39,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 116 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 826 transitions. [2022-01-31 17:33:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2022-01-31 17:33:39,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:39,895 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:39,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:33:39,896 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -760736657, now seen corresponding path program 114 times [2022-01-31 17:33:39,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:39,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530993031] [2022-01-31 17:33:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:39,897 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:39,897 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:39,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:39,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:43,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:43,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:43,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530993031] [2022-01-31 17:33:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530993031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:43,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:43,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:33:43,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101599653] [2022-01-31 17:33:43,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:43,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:33:43,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:33:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:33:43,837 INFO L87 Difference]: Start difference. First operand 822 states and 826 transitions. Second operand has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 117 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:33:51,818 INFO L93 Difference]: Finished difference Result 1533 states and 1544 transitions. [2022-01-31 17:33:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:33:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 117 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 817 [2022-01-31 17:33:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:33:51,820 INFO L225 Difference]: With dead ends: 1533 [2022-01-31 17:33:51,820 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 17:33:51,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:33:51,822 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1569 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:33:51,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 60 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:33:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 17:33:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 829. [2022-01-31 17:33:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 823 states have (on average 1.006075334143378) internal successors, (828), 823 states have internal predecessors, (828), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:33:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 833 transitions. [2022-01-31 17:33:52,074 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 833 transitions. Word has length 817 [2022-01-31 17:33:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:33:52,074 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 833 transitions. [2022-01-31 17:33:52,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 117 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:33:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 833 transitions. [2022-01-31 17:33:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2022-01-31 17:33:52,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:33:52,079 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:33:52,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:33:52,079 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:33:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:33:52,079 INFO L85 PathProgramCache]: Analyzing trace with hash -257470367, now seen corresponding path program 115 times [2022-01-31 17:33:52,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:33:52,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123231401] [2022-01-31 17:33:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:33:52,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:33:52,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:33:52,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:33:52,106 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:33:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:33:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:33:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:33:56,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:33:56,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123231401] [2022-01-31 17:33:56,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123231401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:33:56,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:33:56,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:33:56,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688049202] [2022-01-31 17:33:56,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:33:56,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:33:56,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:33:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:33:56,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:33:56,094 INFO L87 Difference]: Start difference. First operand 829 states and 833 transitions. Second operand has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 118 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:04,568 INFO L93 Difference]: Finished difference Result 1546 states and 1557 transitions. [2022-01-31 17:34:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:34:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 118 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 824 [2022-01-31 17:34:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:04,569 INFO L225 Difference]: With dead ends: 1546 [2022-01-31 17:34:04,569 INFO L226 Difference]: Without dead ends: 839 [2022-01-31 17:34:04,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:34:04,572 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1743 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 1845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1845 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:04,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 75 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1845 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:34:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-31 17:34:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 836. [2022-01-31 17:34:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 830 states have (on average 1.0060240963855422) internal successors, (835), 830 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 840 transitions. [2022-01-31 17:34:04,826 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 840 transitions. Word has length 824 [2022-01-31 17:34:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:04,826 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 840 transitions. [2022-01-31 17:34:04,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 118 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 840 transitions. [2022-01-31 17:34:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2022-01-31 17:34:04,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:04,831 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:04,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:34:04,831 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 414969315, now seen corresponding path program 116 times [2022-01-31 17:34:04,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312243291] [2022-01-31 17:34:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:04,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:04,832 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:04,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:04,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:08,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:08,951 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312243291] [2022-01-31 17:34:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [312243291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:08,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:08,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:34:08,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603221808] [2022-01-31 17:34:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:08,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:34:08,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:34:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:34:08,953 INFO L87 Difference]: Start difference. First operand 836 states and 840 transitions. Second operand has 120 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 119 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:17,793 INFO L93 Difference]: Finished difference Result 1559 states and 1570 transitions. [2022-01-31 17:34:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:34:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 119 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 831 [2022-01-31 17:34:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:17,795 INFO L225 Difference]: With dead ends: 1559 [2022-01-31 17:34:17,795 INFO L226 Difference]: Without dead ends: 846 [2022-01-31 17:34:17,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:34:17,797 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2613 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 2716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2716 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:17,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2614 Valid, 50 Invalid, 3619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2716 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:34:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-31 17:34:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 843. [2022-01-31 17:34:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 837 states have (on average 1.005973715651135) internal successors, (842), 837 states have internal predecessors, (842), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 847 transitions. [2022-01-31 17:34:18,035 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 847 transitions. Word has length 831 [2022-01-31 17:34:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:18,035 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 847 transitions. [2022-01-31 17:34:18,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 119 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 847 transitions. [2022-01-31 17:34:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2022-01-31 17:34:18,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:18,040 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:18,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:34:18,040 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -629100331, now seen corresponding path program 117 times [2022-01-31 17:34:18,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57089774] [2022-01-31 17:34:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:18,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:18,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:18,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:18,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:22,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:22,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57089774] [2022-01-31 17:34:22,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [57089774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:22,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:22,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:34:22,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445853197] [2022-01-31 17:34:22,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:22,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:34:22,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:34:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:34:22,211 INFO L87 Difference]: Start difference. First operand 843 states and 847 transitions. Second operand has 121 states, 121 states have (on average 1.140495867768595) internal successors, (138), 120 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:30,968 INFO L93 Difference]: Finished difference Result 1572 states and 1583 transitions. [2022-01-31 17:34:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:34:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.140495867768595) internal successors, (138), 120 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 838 [2022-01-31 17:34:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:30,969 INFO L225 Difference]: With dead ends: 1572 [2022-01-31 17:34:30,969 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 17:34:30,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:34:30,972 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1875 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 1980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1980 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:30,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1876 Valid, 70 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1980 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:34:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 17:34:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 850. [2022-01-31 17:34:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 844 states have (on average 1.0059241706161137) internal successors, (849), 844 states have internal predecessors, (849), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 854 transitions. [2022-01-31 17:34:31,231 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 854 transitions. Word has length 838 [2022-01-31 17:34:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:31,231 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 854 transitions. [2022-01-31 17:34:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.140495867768595) internal successors, (138), 120 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 854 transitions. [2022-01-31 17:34:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2022-01-31 17:34:31,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:31,236 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:31,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:34:31,236 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 915274071, now seen corresponding path program 118 times [2022-01-31 17:34:31,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:31,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534423056] [2022-01-31 17:34:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:31,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:31,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:31,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:31,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:35,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534423056] [2022-01-31 17:34:35,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534423056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:35,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:35,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:34:35,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514661703] [2022-01-31 17:34:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:34:35,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:34:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:34:35,479 INFO L87 Difference]: Start difference. First operand 850 states and 854 transitions. Second operand has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:44,144 INFO L93 Difference]: Finished difference Result 1585 states and 1596 transitions. [2022-01-31 17:34:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:34:44,144 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 845 [2022-01-31 17:34:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:44,145 INFO L225 Difference]: With dead ends: 1585 [2022-01-31 17:34:44,145 INFO L226 Difference]: Without dead ends: 860 [2022-01-31 17:34:44,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:34:44,148 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2073 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 2179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2074 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2179 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:44,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2074 Valid, 45 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2179 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:34:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-31 17:34:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 857. [2022-01-31 17:34:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 851 states have (on average 1.0058754406580495) internal successors, (856), 851 states have internal predecessors, (856), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 861 transitions. [2022-01-31 17:34:44,395 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 861 transitions. Word has length 845 [2022-01-31 17:34:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:44,395 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 861 transitions. [2022-01-31 17:34:44,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.139344262295082) internal successors, (139), 121 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 861 transitions. [2022-01-31 17:34:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 853 [2022-01-31 17:34:44,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:44,416 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:34:44,417 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:44,417 INFO L85 PathProgramCache]: Analyzing trace with hash 512901961, now seen corresponding path program 119 times [2022-01-31 17:34:44,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:44,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145368493] [2022-01-31 17:34:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:44,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:44,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:44,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:44,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:48,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:34:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:34:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:34:48,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:34:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145368493] [2022-01-31 17:34:48,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145368493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:34:48,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:34:48,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:34:48,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284630812] [2022-01-31 17:34:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:34:48,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:34:48,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:34:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:34:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:34:48,709 INFO L87 Difference]: Start difference. First operand 857 states and 861 transitions. Second operand has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:34:57,780 INFO L93 Difference]: Finished difference Result 1598 states and 1609 transitions. [2022-01-31 17:34:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:34:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 852 [2022-01-31 17:34:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:34:57,782 INFO L225 Difference]: With dead ends: 1598 [2022-01-31 17:34:57,782 INFO L226 Difference]: Without dead ends: 867 [2022-01-31 17:34:57,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:34:57,784 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1899 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 2004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2004 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:34:57,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 55 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2004 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:34:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-31 17:34:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 864. [2022-01-31 17:34:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.005827505827506) internal successors, (863), 858 states have internal predecessors, (863), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:34:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 868 transitions. [2022-01-31 17:34:58,033 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 868 transitions. Word has length 852 [2022-01-31 17:34:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:34:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 868 transitions. [2022-01-31 17:34:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:34:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 868 transitions. [2022-01-31 17:34:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-01-31 17:34:58,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:34:58,038 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:34:58,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:34:58,038 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:34:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:34:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1005373749, now seen corresponding path program 120 times [2022-01-31 17:34:58,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:34:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594005514] [2022-01-31 17:34:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:34:58,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:34:58,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:34:58,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:34:58,069 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:34:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:02,389 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594005514] [2022-01-31 17:35:02,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594005514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:02,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:02,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:35:02,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650783962] [2022-01-31 17:35:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:02,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:35:02,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:02,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:35:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:35:02,393 INFO L87 Difference]: Start difference. First operand 864 states and 868 transitions. Second operand has 124 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:11,428 INFO L93 Difference]: Finished difference Result 1611 states and 1622 transitions. [2022-01-31 17:35:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:35:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 859 [2022-01-31 17:35:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:11,429 INFO L225 Difference]: With dead ends: 1611 [2022-01-31 17:35:11,429 INFO L226 Difference]: Without dead ends: 874 [2022-01-31 17:35:11,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:35:11,432 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1869 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 1976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1976 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:11,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 55 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1976 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:35:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-31 17:35:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 871. [2022-01-31 17:35:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 865 states have (on average 1.0057803468208093) internal successors, (870), 865 states have internal predecessors, (870), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 875 transitions. [2022-01-31 17:35:11,691 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 875 transitions. Word has length 859 [2022-01-31 17:35:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:11,691 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 875 transitions. [2022-01-31 17:35:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 875 transitions. [2022-01-31 17:35:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2022-01-31 17:35:11,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:11,696 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:11,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:35:11,696 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1441859517, now seen corresponding path program 121 times [2022-01-31 17:35:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616587856] [2022-01-31 17:35:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:11,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:11,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:11,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:11,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:16,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:16,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:16,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616587856] [2022-01-31 17:35:16,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [616587856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:16,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:16,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:35:16,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569013353] [2022-01-31 17:35:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:16,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:35:16,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:35:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:35:16,092 INFO L87 Difference]: Start difference. First operand 871 states and 875 transitions. Second operand has 125 states, 125 states have (on average 1.136) internal successors, (142), 124 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:25,398 INFO L93 Difference]: Finished difference Result 1624 states and 1635 transitions. [2022-01-31 17:35:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:35:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.136) internal successors, (142), 124 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 866 [2022-01-31 17:35:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:25,399 INFO L225 Difference]: With dead ends: 1624 [2022-01-31 17:35:25,399 INFO L226 Difference]: Without dead ends: 881 [2022-01-31 17:35:25,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:35:25,402 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2043 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 2149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2044 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2149 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:25,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2044 Valid, 50 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2149 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:35:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-31 17:35:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 878. [2022-01-31 17:35:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 872 states have (on average 1.0057339449541285) internal successors, (877), 872 states have internal predecessors, (877), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 882 transitions. [2022-01-31 17:35:25,686 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 882 transitions. Word has length 866 [2022-01-31 17:35:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:25,686 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 882 transitions. [2022-01-31 17:35:25,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.136) internal successors, (142), 124 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 882 transitions. [2022-01-31 17:35:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2022-01-31 17:35:25,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:25,691 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:25,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:35:25,691 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 230729279, now seen corresponding path program 122 times [2022-01-31 17:35:25,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397524898] [2022-01-31 17:35:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:25,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:25,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:25,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:25,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:30,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:30,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397524898] [2022-01-31 17:35:30,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397524898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:30,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:30,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:35:30,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114477759] [2022-01-31 17:35:30,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:30,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:35:30,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:35:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:35:30,163 INFO L87 Difference]: Start difference. First operand 878 states and 882 transitions. Second operand has 126 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 125 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:39,822 INFO L93 Difference]: Finished difference Result 1637 states and 1648 transitions. [2022-01-31 17:35:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:35:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 125 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 873 [2022-01-31 17:35:39,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:39,823 INFO L225 Difference]: With dead ends: 1637 [2022-01-31 17:35:39,823 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 17:35:39,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:35:39,826 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1809 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1918 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:39,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1810 Valid, 60 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1918 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:35:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 17:35:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 885. [2022-01-31 17:35:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 879 states have (on average 1.005688282138794) internal successors, (884), 879 states have internal predecessors, (884), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 889 transitions. [2022-01-31 17:35:40,106 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 889 transitions. Word has length 873 [2022-01-31 17:35:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:40,107 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 889 transitions. [2022-01-31 17:35:40,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 125 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 889 transitions. [2022-01-31 17:35:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 881 [2022-01-31 17:35:40,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:40,112 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:40,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:35:40,112 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1714552369, now seen corresponding path program 123 times [2022-01-31 17:35:40,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:40,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301668634] [2022-01-31 17:35:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:40,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:40,113 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:40,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:40,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:44,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:44,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:44,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301668634] [2022-01-31 17:35:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301668634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:44,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:44,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:35:44,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149696265] [2022-01-31 17:35:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:44,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:35:44,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:35:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:35:44,664 INFO L87 Difference]: Start difference. First operand 885 states and 889 transitions. Second operand has 127 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 126 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:35:54,533 INFO L93 Difference]: Finished difference Result 1650 states and 1661 transitions. [2022-01-31 17:35:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:35:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 126 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 880 [2022-01-31 17:35:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:35:54,535 INFO L225 Difference]: With dead ends: 1650 [2022-01-31 17:35:54,535 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 17:35:54,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:35:54,537 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1812 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 1922 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1922 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:35:54,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1813 Valid, 50 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1922 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:35:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 17:35:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 892. [2022-01-31 17:35:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 886 states have (on average 1.0056433408577878) internal successors, (891), 886 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:35:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 896 transitions. [2022-01-31 17:35:54,806 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 896 transitions. Word has length 880 [2022-01-31 17:35:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:35:54,806 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 896 transitions. [2022-01-31 17:35:54,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 126 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:35:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 896 transitions. [2022-01-31 17:35:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2022-01-31 17:35:54,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:35:54,812 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:35:54,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:35:54,812 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:35:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:35:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1418414003, now seen corresponding path program 124 times [2022-01-31 17:35:54,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:35:54,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544730441] [2022-01-31 17:35:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:35:54,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:35:54,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:35:54,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:35:54,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:35:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:35:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:35:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:35:59,450 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:35:59,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544730441] [2022-01-31 17:35:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544730441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:35:59,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:35:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:35:59,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497278222] [2022-01-31 17:35:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:35:59,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:35:59,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:35:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:35:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:35:59,454 INFO L87 Difference]: Start difference. First operand 892 states and 896 transitions. Second operand has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:09,722 INFO L93 Difference]: Finished difference Result 1663 states and 1674 transitions. [2022-01-31 17:36:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:36:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 887 [2022-01-31 17:36:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:09,724 INFO L225 Difference]: With dead ends: 1663 [2022-01-31 17:36:09,724 INFO L226 Difference]: Without dead ends: 902 [2022-01-31 17:36:09,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:36:09,727 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2436 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 2550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2437 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2550 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:09,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2437 Valid, 30 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2550 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:36:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-31 17:36:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 899. [2022-01-31 17:36:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 893 states have (on average 1.005599104143337) internal successors, (898), 893 states have internal predecessors, (898), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 903 transitions. [2022-01-31 17:36:10,001 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 903 transitions. Word has length 887 [2022-01-31 17:36:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:10,001 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 903 transitions. [2022-01-31 17:36:10,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.1328125) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 903 transitions. [2022-01-31 17:36:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2022-01-31 17:36:10,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:10,006 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:10,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:36:10,007 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1050007899, now seen corresponding path program 125 times [2022-01-31 17:36:10,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:10,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241026230] [2022-01-31 17:36:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:10,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:10,008 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:10,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:10,038 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:14,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:14,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:14,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241026230] [2022-01-31 17:36:14,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241026230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:14,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:14,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:36:14,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454866877] [2022-01-31 17:36:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:14,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:36:14,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:36:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:36:14,707 INFO L87 Difference]: Start difference. First operand 899 states and 903 transitions. Second operand has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 128 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:24,944 INFO L93 Difference]: Finished difference Result 1676 states and 1687 transitions. [2022-01-31 17:36:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:36:24,944 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 128 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 894 [2022-01-31 17:36:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:24,945 INFO L225 Difference]: With dead ends: 1676 [2022-01-31 17:36:24,945 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 17:36:24,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:36:24,948 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1716 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 1829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:24,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 65 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1829 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:36:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 17:36:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 906. [2022-01-31 17:36:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 900 states have (on average 1.0055555555555555) internal successors, (905), 900 states have internal predecessors, (905), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 910 transitions. [2022-01-31 17:36:25,245 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 910 transitions. Word has length 894 [2022-01-31 17:36:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:25,245 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 910 transitions. [2022-01-31 17:36:25,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1317829457364341) internal successors, (146), 128 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 910 transitions. [2022-01-31 17:36:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 902 [2022-01-31 17:36:25,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:25,250 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:25,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:36:25,251 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash 233315111, now seen corresponding path program 126 times [2022-01-31 17:36:25,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:25,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792642440] [2022-01-31 17:36:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:25,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:25,252 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:25,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:25,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:30,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:30,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792642440] [2022-01-31 17:36:30,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792642440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:30,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:30,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:36:30,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137052234] [2022-01-31 17:36:30,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:30,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:36:30,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:36:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:36:30,073 INFO L87 Difference]: Start difference. First operand 906 states and 910 transitions. Second operand has 130 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 129 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:40,386 INFO L93 Difference]: Finished difference Result 1689 states and 1700 transitions. [2022-01-31 17:36:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:36:40,386 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 129 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 901 [2022-01-31 17:36:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:40,387 INFO L225 Difference]: With dead ends: 1689 [2022-01-31 17:36:40,388 INFO L226 Difference]: Without dead ends: 916 [2022-01-31 17:36:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:36:40,390 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 2311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2311 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:40,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 50 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2311 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:36:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-31 17:36:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 913. [2022-01-31 17:36:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 907 states have (on average 1.0055126791620728) internal successors, (912), 907 states have internal predecessors, (912), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 917 transitions. [2022-01-31 17:36:40,693 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 917 transitions. Word has length 901 [2022-01-31 17:36:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:40,694 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 917 transitions. [2022-01-31 17:36:40,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 129 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 917 transitions. [2022-01-31 17:36:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2022-01-31 17:36:40,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:40,699 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:40,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:36:40,700 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1506901735, now seen corresponding path program 127 times [2022-01-31 17:36:40,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894291518] [2022-01-31 17:36:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:40,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:40,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:40,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:40,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:45,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:36:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:36:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:36:45,645 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:36:45,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894291518] [2022-01-31 17:36:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [894291518] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:36:45,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:36:45,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:36:45,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300507729] [2022-01-31 17:36:45,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:36:45,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:36:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:36:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:36:45,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:36:45,649 INFO L87 Difference]: Start difference. First operand 913 states and 917 transitions. Second operand has 131 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 130 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:36:55,951 INFO L93 Difference]: Finished difference Result 1702 states and 1713 transitions. [2022-01-31 17:36:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:36:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 130 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 908 [2022-01-31 17:36:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:36:55,953 INFO L225 Difference]: With dead ends: 1702 [2022-01-31 17:36:55,953 INFO L226 Difference]: Without dead ends: 923 [2022-01-31 17:36:55,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:36:55,956 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2028 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 2141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2141 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:36:55,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2029 Valid, 60 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2141 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:36:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-31 17:36:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 920. [2022-01-31 17:36:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 914 states have (on average 1.0054704595185995) internal successors, (919), 914 states have internal predecessors, (919), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:36:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 924 transitions. [2022-01-31 17:36:56,255 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 924 transitions. Word has length 908 [2022-01-31 17:36:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:36:56,255 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 924 transitions. [2022-01-31 17:36:56,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 130 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:36:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 924 transitions. [2022-01-31 17:36:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-01-31 17:36:56,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:36:56,260 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:36:56,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:36:56,260 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:36:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:36:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash 600580251, now seen corresponding path program 128 times [2022-01-31 17:36:56,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:36:56,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648845602] [2022-01-31 17:36:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:36:56,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:36:56,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:36:56,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:36:56,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:36:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:01,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:01,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648845602] [2022-01-31 17:37:01,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648845602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:01,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:01,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:37:01,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313325390] [2022-01-31 17:37:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:01,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:37:01,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:37:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:37:01,215 INFO L87 Difference]: Start difference. First operand 920 states and 924 transitions. Second operand has 132 states, 132 states have (on average 1.128787878787879) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:12,021 INFO L93 Difference]: Finished difference Result 1715 states and 1726 transitions. [2022-01-31 17:37:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:37:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.128787878787879) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 915 [2022-01-31 17:37:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:12,022 INFO L225 Difference]: With dead ends: 1715 [2022-01-31 17:37:12,022 INFO L226 Difference]: Without dead ends: 930 [2022-01-31 17:37:12,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:37:12,025 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1926 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 2040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2040 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:12,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1927 Valid, 70 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2040 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:37:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-31 17:37:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 927. [2022-01-31 17:37:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 921 states have (on average 1.00542888165038) internal successors, (926), 921 states have internal predecessors, (926), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 931 transitions. [2022-01-31 17:37:12,317 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 931 transitions. Word has length 915 [2022-01-31 17:37:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:12,317 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 931 transitions. [2022-01-31 17:37:12,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.128787878787879) internal successors, (149), 131 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 931 transitions. [2022-01-31 17:37:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2022-01-31 17:37:12,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:12,323 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:12,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:37:12,323 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1603538317, now seen corresponding path program 129 times [2022-01-31 17:37:12,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:12,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852404131] [2022-01-31 17:37:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:12,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:12,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:12,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:12,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:17,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:17,369 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852404131] [2022-01-31 17:37:17,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852404131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:17,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:17,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:37:17,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293749804] [2022-01-31 17:37:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:17,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:37:17,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:37:17,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:37:17,372 INFO L87 Difference]: Start difference. First operand 927 states and 931 transitions. Second operand has 133 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 132 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:37:28,400 INFO L93 Difference]: Finished difference Result 1728 states and 1739 transitions. [2022-01-31 17:37:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:37:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 132 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 922 [2022-01-31 17:37:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:37:28,401 INFO L225 Difference]: With dead ends: 1728 [2022-01-31 17:37:28,401 INFO L226 Difference]: Without dead ends: 937 [2022-01-31 17:37:28,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:37:28,404 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2226 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 2341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2341 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:37:28,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 55 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2341 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:37:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-31 17:37:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 934. [2022-01-31 17:37:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 928 states have (on average 1.0053879310344827) internal successors, (933), 928 states have internal predecessors, (933), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:37:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 938 transitions. [2022-01-31 17:37:28,719 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 938 transitions. Word has length 922 [2022-01-31 17:37:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:37:28,719 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 938 transitions. [2022-01-31 17:37:28,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 132 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:37:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 938 transitions. [2022-01-31 17:37:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2022-01-31 17:37:28,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:37:28,725 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:37:28,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:37:28,725 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:37:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:37:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash 883709967, now seen corresponding path program 130 times [2022-01-31 17:37:28,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:37:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063333660] [2022-01-31 17:37:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:37:28,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:37:28,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:37:28,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:37:28,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:37:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:33,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:37:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:37:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:37:33,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:37:33,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063333660] [2022-01-31 17:37:33,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063333660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:37:33,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:37:33,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:37:33,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109857130] [2022-01-31 17:37:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:37:33,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:37:33,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:37:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:37:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:37:33,922 INFO L87 Difference]: Start difference. First operand 934 states and 938 transitions. Second operand has 134 states, 134 states have (on average 1.126865671641791) internal successors, (151), 133 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)