/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-lopstr16/base_case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:56:15,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:56:15,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:56:16,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:56:16,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:56:16,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:56:16,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:56:16,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:56:16,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:56:16,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:56:16,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:56:16,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:56:16,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:56:16,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:56:16,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:56:16,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:56:16,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:56:16,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:56:16,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:56:16,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:56:16,080 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 19:56:16,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:56:16,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:56:16,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:56:16,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:56:16,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:56:16,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:56:16,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:56:16,090 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:56:16,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:56:16,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:56:16,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:56:16,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:56:16,255 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:56:16,269 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:56:16,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/base_case.i [2022-01-31 19:56:16,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5959148bb/066cbfb84d964d6a8fb79b6d2e37c621/FLAG0654473b9 [2022-01-31 19:56:16,663 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:56:16,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/base_case.i [2022-01-31 19:56:16,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5959148bb/066cbfb84d964d6a8fb79b6d2e37c621/FLAG0654473b9 [2022-01-31 19:56:16,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5959148bb/066cbfb84d964d6a8fb79b6d2e37c621 [2022-01-31 19:56:16,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:56:16,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:56:16,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:56:16,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:56:16,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:56:16,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1e55a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16, skipping insertion in model container [2022-01-31 19:56:16,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:56:16,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:56:16,851 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-lopstr16/base_case.i[802,815] [2022-01-31 19:56:16,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:56:16,866 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:56:16,873 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-lopstr16/base_case.i[802,815] [2022-01-31 19:56:16,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:56:16,885 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:56:16,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16 WrapperNode [2022-01-31 19:56:16,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:56:16,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:56:16,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:56:16,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:56:16,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:56:16,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:56:16,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:56:16,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:56:16,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (1/1) ... [2022-01-31 19:56:16,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:56:16,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:56:16,936 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 19:56:16,937 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 19:56:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:56:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:56:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:56:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:56:16,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:56:16,976 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:56:16,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 19:56:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 19:56:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:56:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:56:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:56:16,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:56:17,030 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:56:17,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:56:17,151 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:56:17,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:56:17,157 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 19:56:17,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:56:17 BoogieIcfgContainer [2022-01-31 19:56:17,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:56:17,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:56:17,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:56:17,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:56:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:56:16" (1/3) ... [2022-01-31 19:56:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec3a0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:56:17, skipping insertion in model container [2022-01-31 19:56:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:56:16" (2/3) ... [2022-01-31 19:56:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec3a0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:56:17, skipping insertion in model container [2022-01-31 19:56:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:56:17" (3/3) ... [2022-01-31 19:56:17,167 INFO L111 eAbstractionObserver]: Analyzing ICFG base_case.i [2022-01-31 19:56:17,170 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:56:17,171 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:56:17,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:56:17,213 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 19:56:17,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:56:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 19:56:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:56:17,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:17,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:17,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1767461309, now seen corresponding path program 1 times [2022-01-31 19:56:17,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:17,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122231279] [2022-01-31 19:56:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:17,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:17,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,413 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 19:56:17,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122231279] [2022-01-31 19:56:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2122231279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:17,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:17,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:56:17,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297335125] [2022-01-31 19:56:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:17,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:56:17,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:56:17,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:56:17,440 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:17,497 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-31 19:56:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:56:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:56:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:17,504 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:56:17,504 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:56:17,506 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 19:56:17,511 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:17,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:56:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:56:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2022-01-31 19:56:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 19:56:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 19:56:17,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 19:56:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:17,539 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 19:56:17,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 19:56:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 19:56:17,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:17,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:17,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:56:17,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash 585763434, now seen corresponding path program 1 times [2022-01-31 19:56:17,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:17,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729930505] [2022-01-31 19:56:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:17,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:17,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,613 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 19:56:17,613 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:17,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729930505] [2022-01-31 19:56:17,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1729930505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:17,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:17,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:56:17,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327984213] [2022-01-31 19:56:17,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:17,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:56:17,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:56:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:56:17,616 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:17,694 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-31 19:56:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:56:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 19:56:17,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:17,696 INFO L225 Difference]: With dead ends: 43 [2022-01-31 19:56:17,696 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 19:56:17,696 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 19:56:17,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:17,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 19:56:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-01-31 19:56:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 19:56:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 19:56:17,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-01-31 19:56:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:17,710 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 19:56:17,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 19:56:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 19:56:17,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:17,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:17,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:56:17,716 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:17,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2011937585, now seen corresponding path program 1 times [2022-01-31 19:56:17,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067253194] [2022-01-31 19:56:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:17,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:17,734 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:17,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:17,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:17,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067253194] [2022-01-31 19:56:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067253194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:17,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:17,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:56:17,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281481130] [2022-01-31 19:56:17,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:56:17,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:56:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:56:17,837 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:17,923 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-01-31 19:56:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:56:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 19:56:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:17,924 INFO L225 Difference]: With dead ends: 52 [2022-01-31 19:56:17,924 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 19:56:17,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:56:17,928 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:17,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 19:56:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-01-31 19:56:17,932 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 19:56:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 19:56:17,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2022-01-31 19:56:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 19:56:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 19:56:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 19:56:17,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:17,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:56:17,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2132853940, now seen corresponding path program 2 times [2022-01-31 19:56:17,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:17,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762488857] [2022-01-31 19:56:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:17,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:17,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:17,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:17,958 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:18,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:18,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762488857] [2022-01-31 19:56:18,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [762488857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:18,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:18,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:56:18,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804916292] [2022-01-31 19:56:18,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:18,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:56:18,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:56:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:56:18,053 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:18,136 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-01-31 19:56:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:56:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 19:56:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:18,138 INFO L225 Difference]: With dead ends: 61 [2022-01-31 19:56:18,139 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:56:18,140 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 19:56:18,145 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:18,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:56:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2022-01-31 19:56:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 19:56:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 19:56:18,158 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2022-01-31 19:56:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 19:56:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 19:56:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 19:56:18,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:18,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:18,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:56:18,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 443599385, now seen corresponding path program 3 times [2022-01-31 19:56:18,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:18,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664808505] [2022-01-31 19:56:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:18,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:18,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:18,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:18,177 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:18,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664808505] [2022-01-31 19:56:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1664808505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:18,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:18,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:56:18,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521716112] [2022-01-31 19:56:18,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:18,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:56:18,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:56:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:56:18,286 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 19:56:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:18,407 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-31 19:56:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:56:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 19:56:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:18,411 INFO L225 Difference]: With dead ends: 70 [2022-01-31 19:56:18,411 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 19:56:18,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:56:18,412 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:18,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 19:56:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2022-01-31 19:56:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 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 19:56:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-31 19:56:18,421 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-01-31 19:56:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:18,421 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-31 19:56:18,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 19:56:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-31 19:56:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:56:18,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:18,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:18,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:56:18,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash -641362690, now seen corresponding path program 4 times [2022-01-31 19:56:18,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:18,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811276517] [2022-01-31 19:56:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:18,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:18,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:18,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:18,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:18,515 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811276517] [2022-01-31 19:56:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [811276517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:56:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044556740] [2022-01-31 19:56:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:56:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:56:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:56:18,516 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 19:56:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:18,591 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-01-31 19:56:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:56:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 30 [2022-01-31 19:56:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:18,592 INFO L225 Difference]: With dead ends: 79 [2022-01-31 19:56:18,592 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 19:56:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:56:18,593 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 19:56:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-01-31 19:56:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 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 19:56:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-31 19:56:18,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 30 [2022-01-31 19:56:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-31 19:56:18,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 19:56:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-31 19:56:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:56:18,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:18,598 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:56:18,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash -96443037, now seen corresponding path program 5 times [2022-01-31 19:56:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:18,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646312056] [2022-01-31 19:56:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:18,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:18,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:18,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:18,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,747 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 19:56:18,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646312056] [2022-01-31 19:56:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646312056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:18,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:56:18,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504526692] [2022-01-31 19:56:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:18,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:56:18,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:56:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:56:18,749 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 19:56:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:18,836 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-01-31 19:56:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:56:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 34 [2022-01-31 19:56:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:18,837 INFO L225 Difference]: With dead ends: 88 [2022-01-31 19:56:18,837 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 19:56:18,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:56:18,838 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:18,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 62 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 19:56:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-01-31 19:56:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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 19:56:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-01-31 19:56:18,845 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 34 [2022-01-31 19:56:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:18,846 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-01-31 19:56:18,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 19:56:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-01-31 19:56:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 19:56:18,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:18,849 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:18,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:56:18,849 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -966624440, now seen corresponding path program 6 times [2022-01-31 19:56:18,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024174128] [2022-01-31 19:56:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:18,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:18,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:18,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:18,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:18,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024174128] [2022-01-31 19:56:18,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024174128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:18,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:18,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:56:18,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715168522] [2022-01-31 19:56:18,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:18,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:56:18,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:56:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:56:18,972 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 19:56:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:19,067 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-01-31 19:56:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:56:19,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 19:56:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:19,068 INFO L225 Difference]: With dead ends: 97 [2022-01-31 19:56:19,068 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 19:56:19,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:56:19,069 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:19,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 79 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 19:56:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 47. [2022-01-31 19:56:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 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 19:56:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-01-31 19:56:19,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2022-01-31 19:56:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:19,073 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-01-31 19:56:19,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 19:56:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-01-31 19:56:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:56:19,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:19,074 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:19,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:56:19,074 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -435349843, now seen corresponding path program 7 times [2022-01-31 19:56:19,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671074006] [2022-01-31 19:56:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:19,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:19,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:19,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:19,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:19,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:19,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671074006] [2022-01-31 19:56:19,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [671074006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:19,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:19,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:56:19,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507128975] [2022-01-31 19:56:19,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:19,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:56:19,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:56:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:56:19,178 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 19:56:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:19,306 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2022-01-31 19:56:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:56:19,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 19:56:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:19,307 INFO L225 Difference]: With dead ends: 106 [2022-01-31 19:56:19,307 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 19:56:19,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:56:19,308 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:19,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 85 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 19:56:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 51. [2022-01-31 19:56:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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 19:56:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-01-31 19:56:19,312 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2022-01-31 19:56:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:19,312 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-01-31 19:56:19,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 19:56:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-01-31 19:56:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:56:19,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:19,313 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:19,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:56:19,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1367246958, now seen corresponding path program 8 times [2022-01-31 19:56:19,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929680366] [2022-01-31 19:56:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:19,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:19,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:19,321 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:19,420 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:19,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929680366] [2022-01-31 19:56:19,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [929680366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:19,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:19,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:56:19,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960964430] [2022-01-31 19:56:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:56:19,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:56:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:56:19,422 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 19:56:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:19,529 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-01-31 19:56:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:56:19,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 46 [2022-01-31 19:56:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:19,530 INFO L225 Difference]: With dead ends: 115 [2022-01-31 19:56:19,530 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 19:56:19,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:56:19,531 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 165 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:19,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 82 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 19:56:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2022-01-31 19:56:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 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 19:56:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-01-31 19:56:19,535 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 46 [2022-01-31 19:56:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:19,535 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-01-31 19:56:19,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 19:56:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-01-31 19:56:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:56:19,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:19,536 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:19,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:56:19,536 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1918950903, now seen corresponding path program 9 times [2022-01-31 19:56:19,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:19,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281319832] [2022-01-31 19:56:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:19,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:19,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:19,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:19,543 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:19,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281319832] [2022-01-31 19:56:19,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [281319832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:19,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:19,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:56:19,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357381295] [2022-01-31 19:56:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:19,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:56:19,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:56:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:56:19,658 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 19:56:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:19,773 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2022-01-31 19:56:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:56:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 19:56:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:19,775 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:56:19,775 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 19:56:19,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:56:19,775 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:19,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 104 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 19:56:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 59. [2022-01-31 19:56:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 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 19:56:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-01-31 19:56:19,779 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 50 [2022-01-31 19:56:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:19,780 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-01-31 19:56:19,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 19:56:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-01-31 19:56:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:56:19,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:19,780 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:19,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:56:19,780 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash -777221668, now seen corresponding path program 10 times [2022-01-31 19:56:19,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:19,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410944601] [2022-01-31 19:56:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:19,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:19,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:19,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:19,787 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:19,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410944601] [2022-01-31 19:56:19,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [410944601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:19,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:19,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:56:19,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758458821] [2022-01-31 19:56:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:19,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:56:19,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:56:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:56:19,913 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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 19:56:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:20,056 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-01-31 19:56:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:56:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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 54 [2022-01-31 19:56:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:20,057 INFO L225 Difference]: With dead ends: 133 [2022-01-31 19:56:20,057 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:56:20,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:56:20,058 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 186 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:20,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 99 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:56:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2022-01-31 19:56:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 19:56:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-01-31 19:56:20,068 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 54 [2022-01-31 19:56:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:20,069 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-01-31 19:56:20,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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 19:56:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-01-31 19:56:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 19:56:20,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:20,070 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:20,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:56:20,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash 163953473, now seen corresponding path program 11 times [2022-01-31 19:56:20,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:20,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22030358] [2022-01-31 19:56:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:20,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:20,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:20,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:20,077 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:20,213 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22030358] [2022-01-31 19:56:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [22030358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:20,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:20,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:56:20,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635566101] [2022-01-31 19:56:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:20,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:56:20,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:56:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:56:20,215 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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 19:56:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:20,344 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2022-01-31 19:56:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:56:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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 58 [2022-01-31 19:56:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:20,345 INFO L225 Difference]: With dead ends: 142 [2022-01-31 19:56:20,345 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 19:56:20,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:56:20,346 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:20,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 107 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 19:56:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 67. [2022-01-31 19:56:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 61 states have internal predecessors, (76), 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 19:56:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-01-31 19:56:20,349 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 58 [2022-01-31 19:56:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:20,349 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-01-31 19:56:20,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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 19:56:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-01-31 19:56:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:56:20,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:20,350 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:20,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:56:20,350 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1164816934, now seen corresponding path program 12 times [2022-01-31 19:56:20,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:20,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263649409] [2022-01-31 19:56:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:20,355 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:20,355 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:20,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:20,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,511 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 19:56:20,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263649409] [2022-01-31 19:56:20,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263649409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:20,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:20,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:56:20,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063492317] [2022-01-31 19:56:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:20,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:56:20,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:56:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:56:20,512 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 19:56:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:20,654 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2022-01-31 19:56:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:56:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 19:56:20,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:20,655 INFO L225 Difference]: With dead ends: 151 [2022-01-31 19:56:20,655 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:56:20,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:56:20,656 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 165 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:20,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 127 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:56:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 71. [2022-01-31 19:56:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 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 19:56:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-01-31 19:56:20,659 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 62 [2022-01-31 19:56:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:20,660 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-01-31 19:56:20,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 19:56:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-01-31 19:56:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:56:20,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:20,660 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:20,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:56:20,660 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash -322589045, now seen corresponding path program 13 times [2022-01-31 19:56:20,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:20,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783053200] [2022-01-31 19:56:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:20,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:20,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:20,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:20,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:20,854 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 19:56:20,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:20,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783053200] [2022-01-31 19:56:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783053200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:20,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:20,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:56:20,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046254784] [2022-01-31 19:56:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:20,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:56:20,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:56:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:56:20,855 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 19:56:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:21,000 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2022-01-31 19:56:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:56:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 66 [2022-01-31 19:56:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:21,001 INFO L225 Difference]: With dead ends: 160 [2022-01-31 19:56:21,001 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 19:56:21,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:56:21,002 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 202 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:21,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 130 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 19:56:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 75. [2022-01-31 19:56:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 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 19:56:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-01-31 19:56:21,006 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 66 [2022-01-31 19:56:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:21,006 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-01-31 19:56:21,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 19:56:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-01-31 19:56:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:56:21,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:21,006 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:21,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:56:21,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash -179376016, now seen corresponding path program 14 times [2022-01-31 19:56:21,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:21,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388330459] [2022-01-31 19:56:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:21,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:21,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:21,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:21,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:21,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388330459] [2022-01-31 19:56:21,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [388330459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:21,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:21,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:56:21,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801695059] [2022-01-31 19:56:21,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:21,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:56:21,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:56:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:56:21,190 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:56:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:21,350 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2022-01-31 19:56:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:56:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 70 [2022-01-31 19:56:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:21,352 INFO L225 Difference]: With dead ends: 169 [2022-01-31 19:56:21,352 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:56:21,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:56:21,352 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:21,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 131 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:56:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:56:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 79. [2022-01-31 19:56:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 73 states have internal predecessors, (91), 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 19:56:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-01-31 19:56:21,356 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 70 [2022-01-31 19:56:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:21,356 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-01-31 19:56:21,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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 19:56:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-01-31 19:56:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:56:21,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:21,357 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:21,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:56:21,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash 837466069, now seen corresponding path program 15 times [2022-01-31 19:56:21,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:21,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506206039] [2022-01-31 19:56:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:21,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:21,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:21,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:21,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:21,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:21,580 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 19:56:21,580 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506206039] [2022-01-31 19:56:21,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506206039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:21,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:21,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:56:21,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541152620] [2022-01-31 19:56:21,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:21,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:56:21,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:21,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:56:21,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:56:21,582 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 19:56:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:21,766 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2022-01-31 19:56:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:56:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 19:56:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:21,767 INFO L225 Difference]: With dead ends: 178 [2022-01-31 19:56:21,767 INFO L226 Difference]: Without dead ends: 166 [2022-01-31 19:56:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:56:21,769 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 200 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:21,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 149 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-31 19:56:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 83. [2022-01-31 19:56:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 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 19:56:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-01-31 19:56:21,774 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 74 [2022-01-31 19:56:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:21,774 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-01-31 19:56:21,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 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 19:56:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-01-31 19:56:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:56:21,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:21,775 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:21,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:56:21,775 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:21,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1562753862, now seen corresponding path program 16 times [2022-01-31 19:56:21,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077331889] [2022-01-31 19:56:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:21,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:21,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:21,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:21,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,007 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 19:56:22,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077331889] [2022-01-31 19:56:22,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077331889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:22,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:22,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:56:22,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114326198] [2022-01-31 19:56:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:22,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:56:22,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:56:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:56:22,008 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 19:56:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:22,190 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2022-01-31 19:56:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:56:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 78 [2022-01-31 19:56:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:22,191 INFO L225 Difference]: With dead ends: 187 [2022-01-31 19:56:22,191 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 19:56:22,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:56:22,192 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 232 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:22,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 160 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 19:56:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 87. [2022-01-31 19:56:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 81 states have internal predecessors, (101), 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 19:56:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-01-31 19:56:22,195 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 78 [2022-01-31 19:56:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:22,195 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-01-31 19:56:22,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 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 19:56:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-01-31 19:56:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:56:22,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:22,196 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:22,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:56:22,196 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash -977348833, now seen corresponding path program 17 times [2022-01-31 19:56:22,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284464003] [2022-01-31 19:56:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:22,201 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:22,201 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:22,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:22,204 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:22,445 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284464003] [2022-01-31 19:56:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284464003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:22,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:22,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:56:22,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424730273] [2022-01-31 19:56:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:56:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:56:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:56:22,446 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 19:56:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:22,643 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2022-01-31 19:56:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:56:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 82 [2022-01-31 19:56:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:22,644 INFO L225 Difference]: With dead ends: 196 [2022-01-31 19:56:22,644 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 19:56:22,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:56:22,645 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 381 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:22,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 149 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 19:56:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 91. [2022-01-31 19:56:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 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 19:56:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-01-31 19:56:22,649 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 82 [2022-01-31 19:56:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:22,649 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-01-31 19:56:22,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 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 19:56:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-01-31 19:56:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:56:22,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:22,650 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:22,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:56:22,650 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:22,650 INFO L85 PathProgramCache]: Analyzing trace with hash -442913020, now seen corresponding path program 18 times [2022-01-31 19:56:22,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104877251] [2022-01-31 19:56:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:22,654 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:22,654 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:22,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:22,657 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:22,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104877251] [2022-01-31 19:56:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104877251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:22,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:22,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:56:22,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765718322] [2022-01-31 19:56:22,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:22,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:56:22,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:56:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:56:22,910 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 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 19:56:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:23,104 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2022-01-31 19:56:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:56:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-01-31 19:56:23,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:23,106 INFO L225 Difference]: With dead ends: 205 [2022-01-31 19:56:23,106 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 19:56:23,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:56:23,107 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:23,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 163 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 19:56:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2022-01-31 19:56:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 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 19:56:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-01-31 19:56:23,110 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 86 [2022-01-31 19:56:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:23,110 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-01-31 19:56:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 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 19:56:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-01-31 19:56:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:56:23,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:23,111 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:23,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:56:23,111 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1791757417, now seen corresponding path program 19 times [2022-01-31 19:56:23,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495061789] [2022-01-31 19:56:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:23,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:23,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:23,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:23,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:23,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:23,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495061789] [2022-01-31 19:56:23,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495061789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:23,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:23,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:56:23,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834189510] [2022-01-31 19:56:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:23,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:56:23,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:23,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:56:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:56:23,406 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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 19:56:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:23,599 INFO L93 Difference]: Finished difference Result 214 states and 279 transitions. [2022-01-31 19:56:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:56:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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 90 [2022-01-31 19:56:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:23,600 INFO L225 Difference]: With dead ends: 214 [2022-01-31 19:56:23,600 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 19:56:23,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:56:23,601 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 311 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:23,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 156 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 19:56:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 99. [2022-01-31 19:56:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 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 19:56:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2022-01-31 19:56:23,605 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 90 [2022-01-31 19:56:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:23,605 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2022-01-31 19:56:23,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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 19:56:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2022-01-31 19:56:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:56:23,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:23,605 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:23,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:56:23,606 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash 722939726, now seen corresponding path program 20 times [2022-01-31 19:56:23,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:23,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668504009] [2022-01-31 19:56:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:23,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:23,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:23,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:23,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:23,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:23,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:23,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668504009] [2022-01-31 19:56:23,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668504009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:23,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:23,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:56:23,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206318212] [2022-01-31 19:56:23,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:23,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:56:23,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:56:23,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:56:23,876 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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 19:56:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:24,062 INFO L93 Difference]: Finished difference Result 223 states and 291 transitions. [2022-01-31 19:56:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:56:24,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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 94 [2022-01-31 19:56:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:24,065 INFO L225 Difference]: With dead ends: 223 [2022-01-31 19:56:24,065 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:56:24,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:56:24,066 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 414 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:24,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 171 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:56:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 103. [2022-01-31 19:56:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 97 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 19:56:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-01-31 19:56:24,070 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 94 [2022-01-31 19:56:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:24,070 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-01-31 19:56:24,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 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 19:56:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-01-31 19:56:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:56:24,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:24,071 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:56:24,071 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1180936269, now seen corresponding path program 21 times [2022-01-31 19:56:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75394489] [2022-01-31 19:56:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:24,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:24,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:24,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:24,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:24,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:24,448 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 19:56:24,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75394489] [2022-01-31 19:56:24,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [75394489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:24,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:24,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:56:24,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043020074] [2022-01-31 19:56:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:24,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:56:24,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:24,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:56:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:56:24,450 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 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 19:56:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:24,670 INFO L93 Difference]: Finished difference Result 232 states and 303 transitions. [2022-01-31 19:56:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:56:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 19:56:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:24,671 INFO L225 Difference]: With dead ends: 232 [2022-01-31 19:56:24,672 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 19:56:24,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:56:24,672 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 342 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:24,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 185 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 19:56:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 107. [2022-01-31 19:56:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 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 19:56:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-01-31 19:56:24,676 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 98 [2022-01-31 19:56:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:24,677 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-01-31 19:56:24,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 24 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 19:56:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-01-31 19:56:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:56:24,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:24,679 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:56:24,679 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1227045480, now seen corresponding path program 22 times [2022-01-31 19:56:24,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:24,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658614724] [2022-01-31 19:56:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:24,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:24,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:24,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:24,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:25,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:25,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658614724] [2022-01-31 19:56:25,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [658614724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:25,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:25,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:56:25,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296488963] [2022-01-31 19:56:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:25,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:56:25,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:56:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:56:25,018 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 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 19:56:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:25,248 INFO L93 Difference]: Finished difference Result 241 states and 315 transitions. [2022-01-31 19:56:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:56:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 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 102 [2022-01-31 19:56:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:25,250 INFO L225 Difference]: With dead ends: 241 [2022-01-31 19:56:25,250 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:56:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:56:25,250 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 405 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:25,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 186 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:56:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2022-01-31 19:56:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 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 19:56:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2022-01-31 19:56:25,255 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 102 [2022-01-31 19:56:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:25,255 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2022-01-31 19:56:25,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 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 19:56:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2022-01-31 19:56:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 19:56:25,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:25,255 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:25,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:56:25,256 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 549042429, now seen corresponding path program 23 times [2022-01-31 19:56:25,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:25,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324630366] [2022-01-31 19:56:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:25,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:25,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:25,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:25,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,611 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 19:56:25,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:25,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324630366] [2022-01-31 19:56:25,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324630366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:25,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:25,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:56:25,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205500160] [2022-01-31 19:56:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:25,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:56:25,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:56:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:56:25,613 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 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 19:56:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:25,868 INFO L93 Difference]: Finished difference Result 250 states and 327 transitions. [2022-01-31 19:56:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:56:25,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 19:56:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:25,869 INFO L225 Difference]: With dead ends: 250 [2022-01-31 19:56:25,869 INFO L226 Difference]: Without dead ends: 238 [2022-01-31 19:56:25,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:56:25,870 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 476 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:25,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 192 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-31 19:56:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 115. [2022-01-31 19:56:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 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 19:56:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-01-31 19:56:25,874 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 106 [2022-01-31 19:56:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:25,874 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-01-31 19:56:25,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 26 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 19:56:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-01-31 19:56:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:56:25,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:25,875 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:25,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:56:25,875 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1569426974, now seen corresponding path program 24 times [2022-01-31 19:56:25,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:25,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461748328] [2022-01-31 19:56:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:25,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:25,879 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:25,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:25,884 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:26,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461748328] [2022-01-31 19:56:26,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [461748328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:26,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:26,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:56:26,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354276525] [2022-01-31 19:56:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:26,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:56:26,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:26,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:56:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:56:26,229 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 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 19:56:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:26,473 INFO L93 Difference]: Finished difference Result 259 states and 339 transitions. [2022-01-31 19:56:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:56:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 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 110 [2022-01-31 19:56:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:26,474 INFO L225 Difference]: With dead ends: 259 [2022-01-31 19:56:26,474 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 19:56:26,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:56:26,475 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 337 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:26,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 210 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 19:56:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 119. [2022-01-31 19:56:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.247787610619469) internal successors, (141), 113 states have internal predecessors, (141), 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 19:56:26,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2022-01-31 19:56:26,479 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 110 [2022-01-31 19:56:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:26,479 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2022-01-31 19:56:26,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 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 19:56:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2022-01-31 19:56:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:56:26,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:26,480 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:26,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:56:26,480 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -458346425, now seen corresponding path program 25 times [2022-01-31 19:56:26,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437638215] [2022-01-31 19:56:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:26,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:26,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:26,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:26,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:26,854 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 19:56:26,854 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:26,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437638215] [2022-01-31 19:56:26,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [437638215] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:26,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:26,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:56:26,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256004385] [2022-01-31 19:56:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:26,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:56:26,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:56:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:56:26,855 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 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 19:56:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:27,111 INFO L93 Difference]: Finished difference Result 268 states and 351 transitions. [2022-01-31 19:56:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:56:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 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 114 [2022-01-31 19:56:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:27,113 INFO L225 Difference]: With dead ends: 268 [2022-01-31 19:56:27,113 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 19:56:27,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:27,113 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 354 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:27,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 223 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 19:56:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-01-31 19:56:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 117 states have internal predecessors, (146), 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 19:56:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-01-31 19:56:27,119 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 114 [2022-01-31 19:56:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-01-31 19:56:27,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 28 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 19:56:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-01-31 19:56:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 19:56:27,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:27,120 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:27,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:56:27,121 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash -580373460, now seen corresponding path program 26 times [2022-01-31 19:56:27,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:27,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274346628] [2022-01-31 19:56:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:27,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:27,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:27,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:27,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:27,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:27,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:27,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274346628] [2022-01-31 19:56:27,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [274346628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:27,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:27,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:27,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700193619] [2022-01-31 19:56:27,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:27,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:27,491 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 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 19:56:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:27,779 INFO L93 Difference]: Finished difference Result 277 states and 363 transitions. [2022-01-31 19:56:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:56:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 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 118 [2022-01-31 19:56:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:27,781 INFO L225 Difference]: With dead ends: 277 [2022-01-31 19:56:27,781 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 19:56:27,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:56:27,782 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 544 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:27,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 212 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 19:56:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 127. [2022-01-31 19:56:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 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 19:56:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 156 transitions. [2022-01-31 19:56:27,792 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 156 transitions. Word has length 118 [2022-01-31 19:56:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:27,792 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 156 transitions. [2022-01-31 19:56:27,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 29 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 19:56:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 156 transitions. [2022-01-31 19:56:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:56:27,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:27,793 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:27,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:56:27,793 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash 537116049, now seen corresponding path program 27 times [2022-01-31 19:56:27,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:27,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477721257] [2022-01-31 19:56:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:27,798 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:27,798 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:27,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:28,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:28,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477721257] [2022-01-31 19:56:28,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477721257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:28,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:28,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:56:28,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185750998] [2022-01-31 19:56:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:28,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:56:28,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:56:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:56:28,185 INFO L87 Difference]: Start difference. First operand 127 states and 156 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 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 19:56:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:28,497 INFO L93 Difference]: Finished difference Result 286 states and 375 transitions. [2022-01-31 19:56:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:56:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 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 122 [2022-01-31 19:56:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:28,499 INFO L225 Difference]: With dead ends: 286 [2022-01-31 19:56:28,499 INFO L226 Difference]: Without dead ends: 274 [2022-01-31 19:56:28,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:28,500 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 512 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:28,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 213 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-01-31 19:56:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 131. [2022-01-31 19:56:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.248) internal successors, (156), 125 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 19:56:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2022-01-31 19:56:28,504 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 122 [2022-01-31 19:56:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:28,504 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2022-01-31 19:56:28,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 30 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 19:56:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2022-01-31 19:56:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:56:28,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:28,505 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:28,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:56:28,505 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash 759303286, now seen corresponding path program 28 times [2022-01-31 19:56:28,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:28,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741800463] [2022-01-31 19:56:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:28,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:28,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:28,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:28,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,990 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 19:56:28,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:28,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741800463] [2022-01-31 19:56:28,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741800463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:28,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:28,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:56:28,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415749286] [2022-01-31 19:56:28,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:28,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:56:28,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:56:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:28,992 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 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 19:56:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:29,305 INFO L93 Difference]: Finished difference Result 295 states and 387 transitions. [2022-01-31 19:56:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:56:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 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 126 [2022-01-31 19:56:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:29,306 INFO L225 Difference]: With dead ends: 295 [2022-01-31 19:56:29,306 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:56:29,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:56:29,307 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 530 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:29,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 228 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:56:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 135. [2022-01-31 19:56:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.248062015503876) internal successors, (161), 129 states have internal predecessors, (161), 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 19:56:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2022-01-31 19:56:29,312 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 126 [2022-01-31 19:56:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:29,312 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2022-01-31 19:56:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.8125) internal successors, (122), 31 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 19:56:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2022-01-31 19:56:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:56:29,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:29,313 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:29,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:56:29,313 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1018928933, now seen corresponding path program 29 times [2022-01-31 19:56:29,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81361763] [2022-01-31 19:56:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:29,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:29,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:29,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:29,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:29,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81361763] [2022-01-31 19:56:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [81361763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:29,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:29,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:56:29,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272290820] [2022-01-31 19:56:29,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:56:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:56:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:56:29,755 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 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 19:56:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:30,156 INFO L93 Difference]: Finished difference Result 304 states and 399 transitions. [2022-01-31 19:56:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:56:30,156 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 19:56:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:30,158 INFO L225 Difference]: With dead ends: 304 [2022-01-31 19:56:30,158 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 19:56:30,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:56:30,158 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 561 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:30,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 225 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 19:56:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 139. [2022-01-31 19:56:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 133 states have internal predecessors, (166), 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 19:56:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions. [2022-01-31 19:56:30,165 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 130 [2022-01-31 19:56:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:30,165 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 171 transitions. [2022-01-31 19:56:30,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 32 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 19:56:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2022-01-31 19:56:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:56:30,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:30,166 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:30,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:56:30,166 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash 764148416, now seen corresponding path program 30 times [2022-01-31 19:56:30,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:30,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325810942] [2022-01-31 19:56:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:30,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:30,171 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:30,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:30,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:30,661 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325810942] [2022-01-31 19:56:30,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325810942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:30,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:30,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:56:30,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168234196] [2022-01-31 19:56:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:30,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:56:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:56:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:56:30,662 INFO L87 Difference]: Start difference. First operand 139 states and 171 transitions. Second operand has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 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 19:56:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:31,019 INFO L93 Difference]: Finished difference Result 313 states and 411 transitions. [2022-01-31 19:56:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:56:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 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 134 [2022-01-31 19:56:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:31,021 INFO L225 Difference]: With dead ends: 313 [2022-01-31 19:56:31,021 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 19:56:31,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:56:31,022 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 544 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:31,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 256 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 19:56:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 143. [2022-01-31 19:56:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 137 states have internal predecessors, (171), 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 19:56:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-01-31 19:56:31,027 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 134 [2022-01-31 19:56:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:31,027 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-01-31 19:56:31,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 33 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 19:56:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-01-31 19:56:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:56:31,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:31,028 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:31,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:56:31,028 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1795548635, now seen corresponding path program 31 times [2022-01-31 19:56:31,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:31,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361609968] [2022-01-31 19:56:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:31,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:31,034 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:31,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:31,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:31,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:31,547 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 19:56:31,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:31,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361609968] [2022-01-31 19:56:31,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361609968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:31,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:31,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:56:31,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136381311] [2022-01-31 19:56:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:31,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:56:31,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:56:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:56:31,548 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 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 19:56:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:31,895 INFO L93 Difference]: Finished difference Result 322 states and 423 transitions. [2022-01-31 19:56:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:56:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 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 138 [2022-01-31 19:56:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:31,897 INFO L225 Difference]: With dead ends: 322 [2022-01-31 19:56:31,897 INFO L226 Difference]: Without dead ends: 310 [2022-01-31 19:56:31,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:56:31,898 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 650 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:31,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 242 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-31 19:56:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 147. [2022-01-31 19:56:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 141 states have (on average 1.24822695035461) internal successors, (176), 141 states have internal predecessors, (176), 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 19:56:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2022-01-31 19:56:31,902 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 138 [2022-01-31 19:56:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:31,903 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2022-01-31 19:56:31,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 34 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 19:56:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2022-01-31 19:56:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:56:31,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:31,903 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:31,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:56:31,904 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1339031306, now seen corresponding path program 32 times [2022-01-31 19:56:31,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:31,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945041719] [2022-01-31 19:56:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:31,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:31,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:31,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:31,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:32,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:32,464 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 19:56:32,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:32,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945041719] [2022-01-31 19:56:32,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945041719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:32,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:32,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:56:32,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745917194] [2022-01-31 19:56:32,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:32,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:56:32,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:56:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:56:32,466 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 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 19:56:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:32,821 INFO L93 Difference]: Finished difference Result 331 states and 435 transitions. [2022-01-31 19:56:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:56:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 19:56:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:32,823 INFO L225 Difference]: With dead ends: 331 [2022-01-31 19:56:32,823 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 19:56:32,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:56:32,823 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 516 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:32,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 265 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 19:56:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 151. [2022-01-31 19:56:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 145 states have (on average 1.2482758620689656) internal successors, (181), 145 states have internal predecessors, (181), 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 19:56:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2022-01-31 19:56:32,828 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 142 [2022-01-31 19:56:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2022-01-31 19:56:32,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.8333333333333335) internal successors, (138), 35 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 19:56:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2022-01-31 19:56:32,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:56:32,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:32,829 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:32,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:56:32,830 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 833546607, now seen corresponding path program 33 times [2022-01-31 19:56:32,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436237210] [2022-01-31 19:56:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:32,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:32,836 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:32,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:32,846 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:33,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:33,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:33,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436237210] [2022-01-31 19:56:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436237210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:33,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:56:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949418490] [2022-01-31 19:56:33,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:56:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:33,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:56:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:56:33,383 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 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 19:56:33,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:33,734 INFO L93 Difference]: Finished difference Result 340 states and 447 transitions. [2022-01-31 19:56:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:56:33,735 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 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 146 [2022-01-31 19:56:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:33,736 INFO L225 Difference]: With dead ends: 340 [2022-01-31 19:56:33,736 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 19:56:33,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:56:33,737 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 510 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:33,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 267 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 19:56:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 155. [2022-01-31 19:56:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.2483221476510067) internal successors, (186), 149 states have internal predecessors, (186), 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 19:56:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2022-01-31 19:56:33,743 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 146 [2022-01-31 19:56:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:33,744 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2022-01-31 19:56:33,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.8378378378378377) internal successors, (142), 36 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 19:56:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2022-01-31 19:56:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:56:33,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:33,744 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:33,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:56:33,745 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash -610789036, now seen corresponding path program 34 times [2022-01-31 19:56:33,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:33,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544049162] [2022-01-31 19:56:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:33,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:33,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:33,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:33,757 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:34,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544049162] [2022-01-31 19:56:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544049162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:34,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:34,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:56:34,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475937816] [2022-01-31 19:56:34,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:34,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:56:34,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:56:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:56:34,350 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 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 19:56:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:34,716 INFO L93 Difference]: Finished difference Result 349 states and 459 transitions. [2022-01-31 19:56:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:56:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 19:56:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:34,722 INFO L225 Difference]: With dead ends: 349 [2022-01-31 19:56:34,722 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 19:56:34,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:56:34,722 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 739 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:34,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 263 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 19:56:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 159. [2022-01-31 19:56:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2483660130718954) internal successors, (191), 153 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 19:56:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-01-31 19:56:34,727 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 150 [2022-01-31 19:56:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:34,728 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-01-31 19:56:34,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 37 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 19:56:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-01-31 19:56:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:56:34,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:34,728 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:34,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:56:34,728 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash 200068793, now seen corresponding path program 35 times [2022-01-31 19:56:34,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:34,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547376573] [2022-01-31 19:56:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:34,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:34,733 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:34,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:34,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:35,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:35,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547376573] [2022-01-31 19:56:35,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1547376573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:35,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:35,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:56:35,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3102327] [2022-01-31 19:56:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:35,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:56:35,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:56:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:56:35,325 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 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 19:56:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:35,750 INFO L93 Difference]: Finished difference Result 358 states and 471 transitions. [2022-01-31 19:56:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:56:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 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 154 [2022-01-31 19:56:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:35,752 INFO L225 Difference]: With dead ends: 358 [2022-01-31 19:56:35,753 INFO L226 Difference]: Without dead ends: 346 [2022-01-31 19:56:35,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:56:35,753 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 669 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:35,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 271 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-31 19:56:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 163. [2022-01-31 19:56:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 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 19:56:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2022-01-31 19:56:35,760 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 154 [2022-01-31 19:56:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2022-01-31 19:56:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 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 19:56:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2022-01-31 19:56:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:56:35,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:35,761 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:35,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:56:35,762 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash -294762082, now seen corresponding path program 36 times [2022-01-31 19:56:35,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:35,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147041121] [2022-01-31 19:56:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:35,772 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:35,772 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:35,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:35,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:36,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:36,383 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 19:56:36,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:36,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147041121] [2022-01-31 19:56:36,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [147041121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:36,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:56:36,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257326645] [2022-01-31 19:56:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:36,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:56:36,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:56:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:56:36,385 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:36,767 INFO L93 Difference]: Finished difference Result 367 states and 483 transitions. [2022-01-31 19:56:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:56:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 19:56:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:36,771 INFO L225 Difference]: With dead ends: 367 [2022-01-31 19:56:36,771 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 19:56:36,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:56:36,772 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 682 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:36,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 285 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 19:56:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 167. [2022-01-31 19:56:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 161 states have (on average 1.2484472049689441) internal successors, (201), 161 states have internal predecessors, (201), 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 19:56:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 206 transitions. [2022-01-31 19:56:36,777 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 206 transitions. Word has length 158 [2022-01-31 19:56:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:36,777 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 206 transitions. [2022-01-31 19:56:36,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.85) internal successors, (154), 39 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 206 transitions. [2022-01-31 19:56:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:56:36,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:36,778 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:56:36,778 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988739, now seen corresponding path program 37 times [2022-01-31 19:56:36,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:36,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544325049] [2022-01-31 19:56:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:36,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:36,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:36,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:36,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,484 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 19:56:37,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544325049] [2022-01-31 19:56:37,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [544325049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:37,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:37,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:56:37,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279070006] [2022-01-31 19:56:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:37,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:56:37,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:56:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:56:37,487 INFO L87 Difference]: Start difference. First operand 167 states and 206 transitions. Second operand has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:37,897 INFO L93 Difference]: Finished difference Result 376 states and 495 transitions. [2022-01-31 19:56:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:56:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 19:56:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:37,899 INFO L225 Difference]: With dead ends: 376 [2022-01-31 19:56:37,899 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 19:56:37,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:56:37,901 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 626 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:37,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 299 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 19:56:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 171. [2022-01-31 19:56:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.2484848484848485) internal successors, (206), 165 states have internal predecessors, (206), 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 19:56:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2022-01-31 19:56:37,909 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 162 [2022-01-31 19:56:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:37,909 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2022-01-31 19:56:37,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 40 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2022-01-31 19:56:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:56:37,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:37,910 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:37,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:56:37,910 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2078052328, now seen corresponding path program 38 times [2022-01-31 19:56:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255468164] [2022-01-31 19:56:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:37,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:37,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:37,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:37,927 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:38,594 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 19:56:38,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:38,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255468164] [2022-01-31 19:56:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255468164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:38,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:56:38,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227748949] [2022-01-31 19:56:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:38,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:56:38,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:56:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:56:38,596 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:39,024 INFO L93 Difference]: Finished difference Result 385 states and 507 transitions. [2022-01-31 19:56:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:56:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have 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 19:56:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:39,026 INFO L225 Difference]: With dead ends: 385 [2022-01-31 19:56:39,026 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 19:56:39,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:56:39,027 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 726 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:39,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 293 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 19:56:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 175. [2022-01-31 19:56:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 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 19:56:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 216 transitions. [2022-01-31 19:56:39,032 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 216 transitions. Word has length 166 [2022-01-31 19:56:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:39,032 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 216 transitions. [2022-01-31 19:56:39,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 41 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 216 transitions. [2022-01-31 19:56:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:56:39,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:39,033 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:39,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:56:39,033 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1898699597, now seen corresponding path program 39 times [2022-01-31 19:56:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838247165] [2022-01-31 19:56:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:39,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:39,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:39,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:39,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:39,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838247165] [2022-01-31 19:56:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838247165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:39,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:39,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:56:39,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257185807] [2022-01-31 19:56:39,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:56:39,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:56:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:56:39,728 INFO L87 Difference]: Start difference. First operand 175 states and 216 transitions. Second operand has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:40,207 INFO L93 Difference]: Finished difference Result 394 states and 519 transitions. [2022-01-31 19:56:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:56:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 19:56:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:40,209 INFO L225 Difference]: With dead ends: 394 [2022-01-31 19:56:40,209 INFO L226 Difference]: Without dead ends: 382 [2022-01-31 19:56:40,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:56:40,210 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 711 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:40,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 293 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-31 19:56:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 179. [2022-01-31 19:56:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 173 states have (on average 1.2485549132947977) internal successors, (216), 173 states have internal predecessors, (216), 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 19:56:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions. [2022-01-31 19:56:40,216 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 170 [2022-01-31 19:56:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:40,216 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions. [2022-01-31 19:56:40,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.86046511627907) internal successors, (166), 42 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions. [2022-01-31 19:56:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:56:40,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:40,217 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:40,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:56:40,217 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1298983986, now seen corresponding path program 40 times [2022-01-31 19:56:40,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825210049] [2022-01-31 19:56:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:40,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:40,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:40,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:40,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:40,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:40,921 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 19:56:40,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:40,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825210049] [2022-01-31 19:56:40,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825210049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:40,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:40,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:56:40,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479931368] [2022-01-31 19:56:40,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:40,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:56:40,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:56:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:56:40,923 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:41,322 INFO L93 Difference]: Finished difference Result 403 states and 531 transitions. [2022-01-31 19:56:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:56:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 19:56:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:41,324 INFO L225 Difference]: With dead ends: 403 [2022-01-31 19:56:41,324 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 19:56:41,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:56:41,325 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 695 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:41,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 312 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 19:56:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 183. [2022-01-31 19:56:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 177 states have internal predecessors, (221), 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 19:56:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 226 transitions. [2022-01-31 19:56:41,330 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 226 transitions. Word has length 174 [2022-01-31 19:56:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:41,330 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 226 transitions. [2022-01-31 19:56:41,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 43 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 226 transitions. [2022-01-31 19:56:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 19:56:41,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:41,331 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:41,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:56:41,331 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 255918743, now seen corresponding path program 41 times [2022-01-31 19:56:41,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:41,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452606096] [2022-01-31 19:56:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:41,337 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:41,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:41,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:41,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,111 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 19:56:42,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:42,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452606096] [2022-01-31 19:56:42,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452606096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:42,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:42,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:56:42,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414871735] [2022-01-31 19:56:42,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:42,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:56:42,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:56:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:56:42,113 INFO L87 Difference]: Start difference. First operand 183 states and 226 transitions. Second operand has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:42,524 INFO L93 Difference]: Finished difference Result 412 states and 543 transitions. [2022-01-31 19:56:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:56:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-01-31 19:56:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:42,526 INFO L225 Difference]: With dead ends: 412 [2022-01-31 19:56:42,526 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 19:56:42,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:56:42,527 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 660 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:42,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 323 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 19:56:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 187. [2022-01-31 19:56:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.2486187845303867) internal successors, (226), 181 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 19:56:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2022-01-31 19:56:42,532 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 178 [2022-01-31 19:56:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:42,532 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2022-01-31 19:56:42,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 44 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2022-01-31 19:56:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:56:42,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:42,533 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:42,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:56:42,533 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 44654204, now seen corresponding path program 42 times [2022-01-31 19:56:42,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:42,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399792291] [2022-01-31 19:56:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:42,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:42,541 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:42,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:42,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:43,353 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 19:56:43,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399792291] [2022-01-31 19:56:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [399792291] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:43,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:56:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249221860] [2022-01-31 19:56:43,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:56:43,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:56:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:56:43,355 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:43,831 INFO L93 Difference]: Finished difference Result 421 states and 555 transitions. [2022-01-31 19:56:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:56:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 19:56:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:43,833 INFO L225 Difference]: With dead ends: 421 [2022-01-31 19:56:43,833 INFO L226 Difference]: Without dead ends: 409 [2022-01-31 19:56:43,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:56:43,834 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 775 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:43,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 326 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-31 19:56:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 191. [2022-01-31 19:56:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 185 states have (on average 1.2486486486486486) internal successors, (231), 185 states have internal predecessors, (231), 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 19:56:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 236 transitions. [2022-01-31 19:56:43,839 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 236 transitions. Word has length 182 [2022-01-31 19:56:43,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:43,839 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 236 transitions. [2022-01-31 19:56:43,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 45 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 236 transitions. [2022-01-31 19:56:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:56:43,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:43,840 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:43,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:56:43,840 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 285687777, now seen corresponding path program 43 times [2022-01-31 19:56:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:43,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850010222] [2022-01-31 19:56:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:43,845 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:43,845 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:43,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:43,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:44,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:44,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:44,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850010222] [2022-01-31 19:56:44,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850010222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:44,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:44,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:56:44,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933241777] [2022-01-31 19:56:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:44,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:56:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:56:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:56:44,685 INFO L87 Difference]: Start difference. First operand 191 states and 236 transitions. Second operand has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:45,161 INFO L93 Difference]: Finished difference Result 430 states and 567 transitions. [2022-01-31 19:56:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:56:45,161 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:56:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:45,163 INFO L225 Difference]: With dead ends: 430 [2022-01-31 19:56:45,163 INFO L226 Difference]: Without dead ends: 418 [2022-01-31 19:56:45,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:56:45,163 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 760 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:45,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 333 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:56:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-31 19:56:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 195. [2022-01-31 19:56:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.2486772486772486) internal successors, (236), 189 states have internal predecessors, (236), 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 19:56:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2022-01-31 19:56:45,168 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 186 [2022-01-31 19:56:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:45,169 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2022-01-31 19:56:45,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.872340425531915) internal successors, (182), 46 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2022-01-31 19:56:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:56:45,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:45,170 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:45,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:56:45,170 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 287041222, now seen corresponding path program 44 times [2022-01-31 19:56:45,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098775062] [2022-01-31 19:56:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:45,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:45,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:45,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:45,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:45,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098775062] [2022-01-31 19:56:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2098775062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:45,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:45,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:56:45,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981755050] [2022-01-31 19:56:45,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:45,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:56:45,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:56:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:56:45,968 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:46,442 INFO L93 Difference]: Finished difference Result 439 states and 579 transitions. [2022-01-31 19:56:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:56:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 19:56:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:46,444 INFO L225 Difference]: With dead ends: 439 [2022-01-31 19:56:46,444 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 19:56:46,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:56:46,445 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 754 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:46,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 344 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 19:56:46,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 199. [2022-01-31 19:56:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.2487046632124352) internal successors, (241), 193 states have internal predecessors, (241), 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 19:56:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2022-01-31 19:56:46,450 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 190 [2022-01-31 19:56:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:46,450 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2022-01-31 19:56:46,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.875) internal successors, (186), 47 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2022-01-31 19:56:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:56:46,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:46,451 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:46,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:56:46,451 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash 386437931, now seen corresponding path program 45 times [2022-01-31 19:56:46,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:46,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684106851] [2022-01-31 19:56:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:46,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:46,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:46,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:46,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:47,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:47,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:47,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684106851] [2022-01-31 19:56:47,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1684106851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:47,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:47,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:56:47,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037868393] [2022-01-31 19:56:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:56:47,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:56:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:56:47,331 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:47,823 INFO L93 Difference]: Finished difference Result 448 states and 591 transitions. [2022-01-31 19:56:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:56:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have 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 19:56:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:47,824 INFO L225 Difference]: With dead ends: 448 [2022-01-31 19:56:47,824 INFO L226 Difference]: Without dead ends: 436 [2022-01-31 19:56:47,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:56:47,827 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 820 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:47,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 354 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-01-31 19:56:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 203. [2022-01-31 19:56:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.248730964467005) internal successors, (246), 197 states have internal predecessors, (246), 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 19:56:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-01-31 19:56:47,834 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 194 [2022-01-31 19:56:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-01-31 19:56:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-01-31 19:56:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 19:56:47,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:47,835 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:47,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:56:47,835 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1001487088, now seen corresponding path program 46 times [2022-01-31 19:56:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:47,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549378944] [2022-01-31 19:56:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:47,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:47,840 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:47,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:47,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:48,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:48,802 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:48,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549378944] [2022-01-31 19:56:48,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549378944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:48,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:48,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:56:48,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093077687] [2022-01-31 19:56:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:56:48,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:56:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:56:48,803 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:49,311 INFO L93 Difference]: Finished difference Result 457 states and 603 transitions. [2022-01-31 19:56:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:56:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-01-31 19:56:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:49,313 INFO L225 Difference]: With dead ends: 457 [2022-01-31 19:56:49,313 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 19:56:49,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:56:49,313 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 961 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:49,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 345 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 19:56:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 207. [2022-01-31 19:56:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.2487562189054726) internal successors, (251), 201 states have internal predecessors, (251), 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 19:56:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 256 transitions. [2022-01-31 19:56:49,319 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 256 transitions. Word has length 198 [2022-01-31 19:56:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:49,319 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 256 transitions. [2022-01-31 19:56:49,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 256 transitions. [2022-01-31 19:56:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 19:56:49,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:49,320 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:49,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:56:49,320 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1748042635, now seen corresponding path program 47 times [2022-01-31 19:56:49,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010326888] [2022-01-31 19:56:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:49,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:49,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:49,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:49,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:50,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:50,216 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010326888] [2022-01-31 19:56:50,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010326888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:50,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:50,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:56:50,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837515230] [2022-01-31 19:56:50,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:50,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:56:50,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:50,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:56:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:56:50,220 INFO L87 Difference]: Start difference. First operand 207 states and 256 transitions. Second operand has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:50,806 INFO L93 Difference]: Finished difference Result 466 states and 615 transitions. [2022-01-31 19:56:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:56:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 19:56:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:50,807 INFO L225 Difference]: With dead ends: 466 [2022-01-31 19:56:50,808 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 19:56:50,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:56:50,808 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 778 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:50,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 375 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 19:56:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 211. [2022-01-31 19:56:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 205 states have (on average 1.248780487804878) internal successors, (256), 205 states have internal predecessors, (256), 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 19:56:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2022-01-31 19:56:50,814 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 202 [2022-01-31 19:56:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:50,815 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2022-01-31 19:56:50,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.8823529411764706) internal successors, (198), 50 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2022-01-31 19:56:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 19:56:50,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:50,816 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:50,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:56:50,816 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1036728666, now seen corresponding path program 48 times [2022-01-31 19:56:50,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307048193] [2022-01-31 19:56:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:50,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:50,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:50,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:50,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:51,749 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 19:56:51,750 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307048193] [2022-01-31 19:56:51,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307048193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:51,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:51,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:56:51,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321046335] [2022-01-31 19:56:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:51,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:56:51,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:56:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:56:51,751 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:52,308 INFO L93 Difference]: Finished difference Result 475 states and 627 transitions. [2022-01-31 19:56:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:56:52,309 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 19:56:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:52,310 INFO L225 Difference]: With dead ends: 475 [2022-01-31 19:56:52,310 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 19:56:52,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:56:52,311 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 963 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:52,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 354 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 19:56:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 215. [2022-01-31 19:56:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 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 19:56:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 266 transitions. [2022-01-31 19:56:52,316 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 266 transitions. Word has length 206 [2022-01-31 19:56:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:52,316 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 266 transitions. [2022-01-31 19:56:52,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8846153846153846) internal successors, (202), 51 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 266 transitions. [2022-01-31 19:56:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:56:52,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:52,317 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:52,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:56:52,318 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -538674241, now seen corresponding path program 49 times [2022-01-31 19:56:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:52,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759986022] [2022-01-31 19:56:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:52,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:52,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:52,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:52,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:53,288 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 19:56:53,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:53,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759986022] [2022-01-31 19:56:53,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759986022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:53,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:53,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:56:53,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579237050] [2022-01-31 19:56:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:53,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:56:53,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:56:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:56:53,290 INFO L87 Difference]: Start difference. First operand 215 states and 266 transitions. Second operand has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:53,819 INFO L93 Difference]: Finished difference Result 484 states and 639 transitions. [2022-01-31 19:56:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:56:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 19:56:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:53,822 INFO L225 Difference]: With dead ends: 484 [2022-01-31 19:56:53,822 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 19:56:53,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:56:53,823 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 877 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:53,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 371 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 19:56:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 219. [2022-01-31 19:56:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.2488262910798122) internal successors, (266), 213 states have internal predecessors, (266), 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 19:56:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 271 transitions. [2022-01-31 19:56:53,829 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 271 transitions. Word has length 210 [2022-01-31 19:56:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:53,830 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 271 transitions. [2022-01-31 19:56:53,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 271 transitions. [2022-01-31 19:56:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 19:56:53,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:53,831 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:53,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:56:53,831 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1964770212, now seen corresponding path program 50 times [2022-01-31 19:56:53,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824204240] [2022-01-31 19:56:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:53,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:53,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:53,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:53,856 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:54,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:54,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:54,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824204240] [2022-01-31 19:56:54,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824204240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:54,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:54,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:56:54,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647492015] [2022-01-31 19:56:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:54,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:56:54,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:56:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:56:54,971 INFO L87 Difference]: Start difference. First operand 219 states and 271 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:55,519 INFO L93 Difference]: Finished difference Result 493 states and 651 transitions. [2022-01-31 19:56:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:56:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 19:56:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:55,521 INFO L225 Difference]: With dead ends: 493 [2022-01-31 19:56:55,521 INFO L226 Difference]: Without dead ends: 481 [2022-01-31 19:56:55,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:56:55,522 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 773 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:55,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 396 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-31 19:56:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 223. [2022-01-31 19:56:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 217 states have (on average 1.2488479262672811) internal successors, (271), 217 states have internal predecessors, (271), 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 19:56:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 276 transitions. [2022-01-31 19:56:55,528 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 276 transitions. Word has length 214 [2022-01-31 19:56:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:55,528 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 276 transitions. [2022-01-31 19:56:55,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 53 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 276 transitions. [2022-01-31 19:56:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 19:56:55,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:55,529 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:55,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:56:55,529 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:55,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:55,530 INFO L85 PathProgramCache]: Analyzing trace with hash 299045129, now seen corresponding path program 51 times [2022-01-31 19:56:55,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:55,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219789859] [2022-01-31 19:56:55,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:55,535 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:55,536 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:55,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:55,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:56,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:56,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219789859] [2022-01-31 19:56:56,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219789859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:56,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:56,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:56:56,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385648] [2022-01-31 19:56:56,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:56,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:56:56,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:56:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:56:56,644 INFO L87 Difference]: Start difference. First operand 223 states and 276 transitions. Second operand has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:57,235 INFO L93 Difference]: Finished difference Result 502 states and 663 transitions. [2022-01-31 19:56:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:56:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-01-31 19:56:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:57,237 INFO L225 Difference]: With dead ends: 502 [2022-01-31 19:56:57,237 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 19:56:57,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:56:57,237 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 940 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:57,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 387 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 19:56:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 227. [2022-01-31 19:56:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.248868778280543) internal successors, (276), 221 states have internal predecessors, (276), 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 19:56:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 281 transitions. [2022-01-31 19:56:57,243 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 281 transitions. Word has length 218 [2022-01-31 19:56:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 281 transitions. [2022-01-31 19:56:57,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.890909090909091) internal successors, (214), 54 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 281 transitions. [2022-01-31 19:56:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 19:56:57,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:57,244 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:57,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:56:57,244 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:57,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash 936043502, now seen corresponding path program 52 times [2022-01-31 19:56:57,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324774305] [2022-01-31 19:56:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:57,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:57,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:57,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:57,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:56:58,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:58,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324774305] [2022-01-31 19:56:58,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324774305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:58,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:58,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:56:58,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891703067] [2022-01-31 19:56:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:58,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:56:58,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:56:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:56:58,279 INFO L87 Difference]: Start difference. First operand 227 states and 281 transitions. Second operand has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,885 INFO L93 Difference]: Finished difference Result 511 states and 675 transitions. [2022-01-31 19:56:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:56:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have 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 19:56:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,887 INFO L225 Difference]: With dead ends: 511 [2022-01-31 19:56:58,887 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 19:56:58,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:56:58,888 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1141 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 370 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:56:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 19:56:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 231. [2022-01-31 19:56:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.248888888888889) internal successors, (281), 225 states have internal predecessors, (281), 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 19:56:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2022-01-31 19:56:58,893 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 222 [2022-01-31 19:56:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:58,894 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2022-01-31 19:56:58,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 55 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:56:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2022-01-31 19:56:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 19:56:58,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:58,895 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:58,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:56:58,895 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash 639941715, now seen corresponding path program 53 times [2022-01-31 19:56:58,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390709669] [2022-01-31 19:56:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:58,900 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:56:58,900 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:56:58,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:58,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:59,976 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 19:56:59,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390709669] [2022-01-31 19:56:59,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390709669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:59,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:59,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:56:59,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811504416] [2022-01-31 19:56:59,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:59,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:56:59,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:56:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:56:59,978 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:00,597 INFO L93 Difference]: Finished difference Result 520 states and 687 transitions. [2022-01-31 19:57:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:57:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 19:57:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:00,599 INFO L225 Difference]: With dead ends: 520 [2022-01-31 19:57:00,599 INFO L226 Difference]: Without dead ends: 508 [2022-01-31 19:57:00,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:57:00,599 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1060 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:00,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 407 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-31 19:57:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 235. [2022-01-31 19:57:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 229 states have (on average 1.2489082969432315) internal successors, (286), 229 states have internal predecessors, (286), 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 19:57:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 291 transitions. [2022-01-31 19:57:00,605 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 291 transitions. Word has length 226 [2022-01-31 19:57:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:00,605 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 291 transitions. [2022-01-31 19:57:00,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8947368421052633) internal successors, (222), 56 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 291 transitions. [2022-01-31 19:57:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:57:00,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:00,606 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:00,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:57:00,607 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 694278712, now seen corresponding path program 54 times [2022-01-31 19:57:00,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:00,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593314627] [2022-01-31 19:57:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:00,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:00,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:00,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:00,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:01,761 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 19:57:01,761 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:01,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593314627] [2022-01-31 19:57:01,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593314627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:01,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:01,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:57:01,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736006878] [2022-01-31 19:57:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:01,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:57:01,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:57:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:57:01,763 INFO L87 Difference]: Start difference. First operand 235 states and 291 transitions. Second operand has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:02,449 INFO L93 Difference]: Finished difference Result 529 states and 699 transitions. [2022-01-31 19:57:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:57:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 19:57:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:02,451 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:57:02,451 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 19:57:02,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:57:02,451 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 808 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:02,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 445 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 19:57:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 239. [2022-01-31 19:57:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.2489270386266094) internal successors, (291), 233 states have internal predecessors, (291), 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 19:57:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-01-31 19:57:02,459 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 230 [2022-01-31 19:57:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-01-31 19:57:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.896551724137931) internal successors, (226), 57 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-01-31 19:57:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:57:02,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:02,460 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:02,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:57:02,461 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash -345801315, now seen corresponding path program 55 times [2022-01-31 19:57:02,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:02,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707234513] [2022-01-31 19:57:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:02,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:02,467 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:02,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:02,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:03,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:03,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707234513] [2022-01-31 19:57:03,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [707234513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:03,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:03,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:57:03,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378458825] [2022-01-31 19:57:03,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:03,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:57:03,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:57:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:57:03,610 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:04,300 INFO L93 Difference]: Finished difference Result 538 states and 711 transitions. [2022-01-31 19:57:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:57:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 19:57:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:04,302 INFO L225 Difference]: With dead ends: 538 [2022-01-31 19:57:04,302 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 19:57:04,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:57:04,303 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1018 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:04,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 396 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:57:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 19:57:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 243. [2022-01-31 19:57:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.248945147679325) internal successors, (296), 237 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 19:57:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2022-01-31 19:57:04,309 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 234 [2022-01-31 19:57:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:04,309 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2022-01-31 19:57:04,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 58 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2022-01-31 19:57:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 19:57:04,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:04,310 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:04,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:57:04,311 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1016404350, now seen corresponding path program 56 times [2022-01-31 19:57:04,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277413103] [2022-01-31 19:57:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:04,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:04,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:04,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:04,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:05,536 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277413103] [2022-01-31 19:57:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [277413103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:05,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:05,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:57:05,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114940832] [2022-01-31 19:57:05,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:05,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:57:05,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:57:05,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:57:05,537 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:06,221 INFO L93 Difference]: Finished difference Result 547 states and 723 transitions. [2022-01-31 19:57:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:57:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 19:57:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:06,223 INFO L225 Difference]: With dead ends: 547 [2022-01-31 19:57:06,223 INFO L226 Difference]: Without dead ends: 535 [2022-01-31 19:57:06,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:57:06,224 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1270 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:06,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 406 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-31 19:57:06,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 247. [2022-01-31 19:57:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 241 states have (on average 1.2489626556016598) internal successors, (301), 241 states have internal predecessors, (301), 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 19:57:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 306 transitions. [2022-01-31 19:57:06,230 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 306 transitions. Word has length 238 [2022-01-31 19:57:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:06,231 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 306 transitions. [2022-01-31 19:57:06,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9) internal successors, (234), 59 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 306 transitions. [2022-01-31 19:57:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 19:57:06,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:06,232 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:06,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:57:06,232 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 102323431, now seen corresponding path program 57 times [2022-01-31 19:57:06,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781397471] [2022-01-31 19:57:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:06,237 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:06,237 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:06,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:06,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:07,475 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 19:57:07,476 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:07,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781397471] [2022-01-31 19:57:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781397471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:07,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:07,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:57:07,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596677910] [2022-01-31 19:57:07,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:07,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:57:07,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:57:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:57:07,477 INFO L87 Difference]: Start difference. First operand 247 states and 306 transitions. Second operand has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:08,178 INFO L93 Difference]: Finished difference Result 556 states and 735 transitions. [2022-01-31 19:57:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:57:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-01-31 19:57:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:08,180 INFO L225 Difference]: With dead ends: 556 [2022-01-31 19:57:08,180 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 19:57:08,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:57:08,181 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1185 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:08,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 415 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 19:57:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 251. [2022-01-31 19:57:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 245 states have (on average 1.2489795918367348) internal successors, (306), 245 states have internal predecessors, (306), 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 19:57:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 311 transitions. [2022-01-31 19:57:08,187 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 311 transitions. Word has length 242 [2022-01-31 19:57:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 311 transitions. [2022-01-31 19:57:08,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.901639344262295) internal successors, (238), 60 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 311 transitions. [2022-01-31 19:57:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 19:57:08,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:08,189 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:57:08,189 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1433405644, now seen corresponding path program 58 times [2022-01-31 19:57:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:08,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528886388] [2022-01-31 19:57:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:08,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:08,193 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:08,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:08,215 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:09,507 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 19:57:09,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528886388] [2022-01-31 19:57:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528886388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:09,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:09,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:57:09,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601767926] [2022-01-31 19:57:09,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:09,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:57:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:57:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:57:09,509 INFO L87 Difference]: Start difference. First operand 251 states and 311 transitions. Second operand has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:10,223 INFO L93 Difference]: Finished difference Result 565 states and 747 transitions. [2022-01-31 19:57:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:57:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 19:57:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:10,225 INFO L225 Difference]: With dead ends: 565 [2022-01-31 19:57:10,226 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 19:57:10,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:57:10,226 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1031 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:10,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 442 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 19:57:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 255. [2022-01-31 19:57:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.248995983935743) internal successors, (311), 249 states have internal predecessors, (311), 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 19:57:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 316 transitions. [2022-01-31 19:57:10,233 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 316 transitions. Word has length 246 [2022-01-31 19:57:10,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:10,233 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 316 transitions. [2022-01-31 19:57:10,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.903225806451613) internal successors, (242), 61 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 316 transitions. [2022-01-31 19:57:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 19:57:10,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:10,234 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:10,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:57:10,234 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:10,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash -254787023, now seen corresponding path program 59 times [2022-01-31 19:57:10,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024164460] [2022-01-31 19:57:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:10,238 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:10,238 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:10,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:10,260 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:11,618 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 19:57:11,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:11,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024164460] [2022-01-31 19:57:11,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2024164460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:11,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:11,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:57:11,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799159766] [2022-01-31 19:57:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:11,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:57:11,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:57:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:57:11,620 INFO L87 Difference]: Start difference. First operand 255 states and 316 transitions. Second operand has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:12,367 INFO L93 Difference]: Finished difference Result 574 states and 759 transitions. [2022-01-31 19:57:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:57:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have 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 19:57:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:12,370 INFO L225 Difference]: With dead ends: 574 [2022-01-31 19:57:12,370 INFO L226 Difference]: Without dead ends: 562 [2022-01-31 19:57:12,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:57:12,370 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1237 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:12,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1297 Valid, 417 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-31 19:57:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 259. [2022-01-31 19:57:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 253 states have (on average 1.2490118577075098) internal successors, (316), 253 states have internal predecessors, (316), 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 19:57:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 321 transitions. [2022-01-31 19:57:12,376 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 321 transitions. Word has length 250 [2022-01-31 19:57:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:12,377 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 321 transitions. [2022-01-31 19:57:12,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 62 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 321 transitions. [2022-01-31 19:57:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 19:57:12,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:12,378 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:57:12,378 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash 83575062, now seen corresponding path program 60 times [2022-01-31 19:57:12,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:12,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061733547] [2022-01-31 19:57:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:12,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:12,387 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:12,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:12,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:13,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061733547] [2022-01-31 19:57:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061733547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:13,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:13,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:57:13,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206803089] [2022-01-31 19:57:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:13,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:57:13,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:57:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:57:13,802 INFO L87 Difference]: Start difference. First operand 259 states and 321 transitions. Second operand has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:14,601 INFO L93 Difference]: Finished difference Result 583 states and 771 transitions. [2022-01-31 19:57:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:57:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 19:57:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:14,603 INFO L225 Difference]: With dead ends: 583 [2022-01-31 19:57:14,603 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 19:57:14,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:57:14,604 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1129 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:14,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 453 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 19:57:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 263. [2022-01-31 19:57:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 257 states have (on average 1.2490272373540856) internal successors, (321), 257 states have internal predecessors, (321), 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 19:57:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 326 transitions. [2022-01-31 19:57:14,610 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 326 transitions. Word has length 254 [2022-01-31 19:57:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:14,611 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 326 transitions. [2022-01-31 19:57:14,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.90625) internal successors, (250), 63 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 326 transitions. [2022-01-31 19:57:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 19:57:14,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:14,612 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:14,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:57:14,612 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -65911429, now seen corresponding path program 61 times [2022-01-31 19:57:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794359649] [2022-01-31 19:57:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:14,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:14,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:14,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:14,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:16,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:16,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794359649] [2022-01-31 19:57:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [794359649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:16,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:16,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:57:16,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496497545] [2022-01-31 19:57:16,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:16,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:57:16,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:57:16,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:57:16,114 INFO L87 Difference]: Start difference. First operand 263 states and 326 transitions. Second operand has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:16,871 INFO L93 Difference]: Finished difference Result 592 states and 783 transitions. [2022-01-31 19:57:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:57:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-01-31 19:57:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:16,873 INFO L225 Difference]: With dead ends: 592 [2022-01-31 19:57:16,873 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 19:57:16,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:57:16,874 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1038 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:16,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 456 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 19:57:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 267. [2022-01-31 19:57:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 261 states have (on average 1.2490421455938698) internal successors, (326), 261 states have internal predecessors, (326), 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 19:57:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 331 transitions. [2022-01-31 19:57:16,881 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 331 transitions. Word has length 258 [2022-01-31 19:57:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 331 transitions. [2022-01-31 19:57:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9076923076923076) internal successors, (254), 64 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 331 transitions. [2022-01-31 19:57:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 19:57:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:16,882 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:57:16,882 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -845770912, now seen corresponding path program 62 times [2022-01-31 19:57:16,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:16,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689575680] [2022-01-31 19:57:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:16,894 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:16,894 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:16,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:16,917 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:18,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689575680] [2022-01-31 19:57:18,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [689575680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:18,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:18,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:57:18,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993927636] [2022-01-31 19:57:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:18,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:57:18,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:57:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:57:18,407 INFO L87 Difference]: Start difference. First operand 267 states and 331 transitions. Second operand has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:19,203 INFO L93 Difference]: Finished difference Result 601 states and 795 transitions. [2022-01-31 19:57:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:57:19,203 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 19:57:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:19,205 INFO L225 Difference]: With dead ends: 601 [2022-01-31 19:57:19,205 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 19:57:19,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:57:19,206 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1095 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:19,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 468 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 19:57:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 271. [2022-01-31 19:57:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 265 states have (on average 1.2490566037735849) internal successors, (331), 265 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 19:57:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 336 transitions. [2022-01-31 19:57:19,213 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 336 transitions. Word has length 262 [2022-01-31 19:57:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:19,213 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 336 transitions. [2022-01-31 19:57:19,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.909090909090909) internal successors, (258), 65 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 336 transitions. [2022-01-31 19:57:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-31 19:57:19,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:19,214 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:19,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:57:19,214 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1315528389, now seen corresponding path program 63 times [2022-01-31 19:57:19,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022893877] [2022-01-31 19:57:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:19,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:19,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:19,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:19,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:20,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022893877] [2022-01-31 19:57:20,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022893877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:20,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:20,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:57:20,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152234899] [2022-01-31 19:57:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:20,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:57:20,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:57:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:57:20,753 INFO L87 Difference]: Start difference. First operand 271 states and 336 transitions. Second operand has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:21,568 INFO L93 Difference]: Finished difference Result 610 states and 807 transitions. [2022-01-31 19:57:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:57:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-01-31 19:57:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:21,570 INFO L225 Difference]: With dead ends: 610 [2022-01-31 19:57:21,570 INFO L226 Difference]: Without dead ends: 598 [2022-01-31 19:57:21,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:57:21,571 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1140 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:21,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 465 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-31 19:57:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 275. [2022-01-31 19:57:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 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 19:57:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 341 transitions. [2022-01-31 19:57:21,578 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 341 transitions. Word has length 266 [2022-01-31 19:57:21,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:21,578 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 341 transitions. [2022-01-31 19:57:21,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.91044776119403) internal successors, (262), 66 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 341 transitions. [2022-01-31 19:57:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 19:57:21,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:21,579 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:21,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:57:21,579 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2134117462, now seen corresponding path program 64 times [2022-01-31 19:57:21,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:21,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673435999] [2022-01-31 19:57:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:21,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:21,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:21,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:21,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:23,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:23,115 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 19:57:23,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:23,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673435999] [2022-01-31 19:57:23,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673435999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:23,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:23,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:57:23,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435535630] [2022-01-31 19:57:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:23,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:57:23,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:57:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:57:23,117 INFO L87 Difference]: Start difference. First operand 275 states and 341 transitions. Second operand has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:23,971 INFO L93 Difference]: Finished difference Result 619 states and 819 transitions. [2022-01-31 19:57:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:57:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 19:57:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:23,973 INFO L225 Difference]: With dead ends: 619 [2022-01-31 19:57:23,973 INFO L226 Difference]: Without dead ends: 607 [2022-01-31 19:57:23,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:57:23,974 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1344 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:23,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 474 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-31 19:57:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 279. [2022-01-31 19:57:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.249084249084249) internal successors, (341), 273 states have internal predecessors, (341), 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 19:57:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 346 transitions. [2022-01-31 19:57:23,980 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 346 transitions. Word has length 270 [2022-01-31 19:57:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:23,981 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 346 transitions. [2022-01-31 19:57:23,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.911764705882353) internal successors, (266), 67 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 346 transitions. [2022-01-31 19:57:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 19:57:23,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:23,982 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:57:23,982 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -463499761, now seen corresponding path program 65 times [2022-01-31 19:57:23,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:23,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958631520] [2022-01-31 19:57:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:23,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:23,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:23,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:24,018 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,572 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 19:57:25,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958631520] [2022-01-31 19:57:25,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958631520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:25,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:25,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:57:25,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020538047] [2022-01-31 19:57:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:25,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:57:25,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:57:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:57:25,574 INFO L87 Difference]: Start difference. First operand 279 states and 346 transitions. Second operand has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:26,416 INFO L93 Difference]: Finished difference Result 628 states and 831 transitions. [2022-01-31 19:57:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:57:26,416 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-01-31 19:57:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:26,418 INFO L225 Difference]: With dead ends: 628 [2022-01-31 19:57:26,418 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 19:57:26,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:57:26,419 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1496 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:26,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 479 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 19:57:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 283. [2022-01-31 19:57:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 277 states have (on average 1.2490974729241877) internal successors, (346), 277 states have internal predecessors, (346), 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 19:57:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 351 transitions. [2022-01-31 19:57:26,426 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 351 transitions. Word has length 274 [2022-01-31 19:57:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:26,426 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 351 transitions. [2022-01-31 19:57:26,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9130434782608696) internal successors, (270), 68 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 351 transitions. [2022-01-31 19:57:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 19:57:26,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:26,427 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:26,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:57:26,427 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -970625548, now seen corresponding path program 66 times [2022-01-31 19:57:26,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:26,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897912246] [2022-01-31 19:57:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:26,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:26,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:26,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:26,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:28,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897912246] [2022-01-31 19:57:28,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897912246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:28,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:28,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:57:28,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288386760] [2022-01-31 19:57:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:28,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:57:28,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:57:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:57:28,010 INFO L87 Difference]: Start difference. First operand 283 states and 351 transitions. Second operand has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:28,944 INFO L93 Difference]: Finished difference Result 637 states and 843 transitions. [2022-01-31 19:57:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:57:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-01-31 19:57:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:28,947 INFO L225 Difference]: With dead ends: 637 [2022-01-31 19:57:28,947 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 19:57:28,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2418, Invalid=2552, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:57:28,947 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1427 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:28,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 472 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 19:57:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 287. [2022-01-31 19:57:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 281 states have (on average 1.2491103202846976) internal successors, (351), 281 states have internal predecessors, (351), 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 19:57:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2022-01-31 19:57:28,954 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 278 [2022-01-31 19:57:28,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:28,955 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2022-01-31 19:57:28,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.914285714285714) internal successors, (274), 69 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2022-01-31 19:57:28,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-01-31 19:57:28,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:28,956 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:28,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:57:28,956 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1870736551, now seen corresponding path program 67 times [2022-01-31 19:57:28,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808355953] [2022-01-31 19:57:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:28,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:28,966 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:28,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:28,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:30,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:30,635 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 19:57:30,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:30,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808355953] [2022-01-31 19:57:30,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808355953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:30,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:30,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:57:30,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605343269] [2022-01-31 19:57:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:30,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:57:30,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:57:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:57:30,637 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:31,544 INFO L93 Difference]: Finished difference Result 646 states and 855 transitions. [2022-01-31 19:57:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:57:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2022-01-31 19:57:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:31,547 INFO L225 Difference]: With dead ends: 646 [2022-01-31 19:57:31,547 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 19:57:31,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:57:31,547 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1409 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:31,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 486 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 19:57:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 291. [2022-01-31 19:57:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 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 19:57:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 361 transitions. [2022-01-31 19:57:31,554 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 361 transitions. Word has length 282 [2022-01-31 19:57:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:31,554 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 361 transitions. [2022-01-31 19:57:31,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.915492957746479) internal successors, (278), 70 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 361 transitions. [2022-01-31 19:57:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 19:57:31,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:31,556 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:31,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:57:31,556 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 455933502, now seen corresponding path program 68 times [2022-01-31 19:57:31,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964811894] [2022-01-31 19:57:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:31,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:31,560 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:31,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:31,589 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:33,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964811894] [2022-01-31 19:57:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964811894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:33,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:33,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:57:33,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875161749] [2022-01-31 19:57:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:57:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:57:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:57:33,274 INFO L87 Difference]: Start difference. First operand 291 states and 361 transitions. Second operand has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:34,219 INFO L93 Difference]: Finished difference Result 655 states and 867 transitions. [2022-01-31 19:57:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:57:34,219 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 19:57:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:34,221 INFO L225 Difference]: With dead ends: 655 [2022-01-31 19:57:34,221 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 19:57:34,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:57:34,222 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1277 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:34,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 513 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 19:57:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 295. [2022-01-31 19:57:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.2491349480968859) internal successors, (361), 289 states have internal predecessors, (361), 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 19:57:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 366 transitions. [2022-01-31 19:57:34,229 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 366 transitions. Word has length 286 [2022-01-31 19:57:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 366 transitions. [2022-01-31 19:57:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9166666666666665) internal successors, (282), 71 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 366 transitions. [2022-01-31 19:57:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-31 19:57:34,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:34,231 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:34,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:57:34,231 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash -78565725, now seen corresponding path program 69 times [2022-01-31 19:57:34,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:34,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772360065] [2022-01-31 19:57:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:34,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:34,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:34,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:34,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:35,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772360065] [2022-01-31 19:57:35,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [772360065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:35,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:35,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:57:35,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085545250] [2022-01-31 19:57:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:35,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:57:35,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:57:35,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:57:35,968 INFO L87 Difference]: Start difference. First operand 295 states and 366 transitions. Second operand has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:36,933 INFO L93 Difference]: Finished difference Result 664 states and 879 transitions. [2022-01-31 19:57:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:57:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-01-31 19:57:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:36,935 INFO L225 Difference]: With dead ends: 664 [2022-01-31 19:57:36,935 INFO L226 Difference]: Without dead ends: 652 [2022-01-31 19:57:36,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:57:36,936 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1298 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:36,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 520 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:57:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-31 19:57:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 299. [2022-01-31 19:57:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 293 states have (on average 1.2491467576791808) internal successors, (366), 293 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 19:57:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 371 transitions. [2022-01-31 19:57:36,944 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 371 transitions. Word has length 290 [2022-01-31 19:57:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:36,944 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 371 transitions. [2022-01-31 19:57:36,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9178082191780823) internal successors, (286), 72 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 371 transitions. [2022-01-31 19:57:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 19:57:36,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:36,945 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:36,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:57:36,945 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -747854712, now seen corresponding path program 70 times [2022-01-31 19:57:36,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:36,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324238859] [2022-01-31 19:57:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:36,950 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:36,950 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:36,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:37,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:38,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:38,719 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 19:57:38,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:38,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324238859] [2022-01-31 19:57:38,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [324238859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:38,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:38,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:57:38,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472849036] [2022-01-31 19:57:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:57:38,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:57:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:57:38,721 INFO L87 Difference]: Start difference. First operand 299 states and 371 transitions. Second operand has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:39,790 INFO L93 Difference]: Finished difference Result 673 states and 891 transitions. [2022-01-31 19:57:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:57:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-01-31 19:57:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:39,792 INFO L225 Difference]: With dead ends: 673 [2022-01-31 19:57:39,792 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 19:57:39,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:57:39,793 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1494 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:39,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 519 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 19:57:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 303. [2022-01-31 19:57:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.2491582491582491) internal successors, (371), 297 states have internal predecessors, (371), 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 19:57:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 376 transitions. [2022-01-31 19:57:39,800 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 376 transitions. Word has length 294 [2022-01-31 19:57:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:39,800 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 376 transitions. [2022-01-31 19:57:39,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.918918918918919) internal successors, (290), 73 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 376 transitions. [2022-01-31 19:57:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 19:57:39,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:39,801 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:39,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:57:39,801 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1553948691, now seen corresponding path program 71 times [2022-01-31 19:57:39,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:39,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317397410] [2022-01-31 19:57:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:39,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:39,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:39,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:39,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,618 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 19:57:41,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317397410] [2022-01-31 19:57:41,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [317397410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:41,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:41,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:57:41,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924643323] [2022-01-31 19:57:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:41,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:57:41,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:57:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:57:41,621 INFO L87 Difference]: Start difference. First operand 303 states and 376 transitions. Second operand has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:42,730 INFO L93 Difference]: Finished difference Result 682 states and 903 transitions. [2022-01-31 19:57:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:57:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-01-31 19:57:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:42,733 INFO L225 Difference]: With dead ends: 682 [2022-01-31 19:57:42,733 INFO L226 Difference]: Without dead ends: 670 [2022-01-31 19:57:42,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:57:42,734 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1292 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:42,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1364 Valid, 531 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-31 19:57:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 307. [2022-01-31 19:57:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 301 states have (on average 1.2491694352159468) internal successors, (376), 301 states have internal predecessors, (376), 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 19:57:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 381 transitions. [2022-01-31 19:57:42,741 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 381 transitions. Word has length 298 [2022-01-31 19:57:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:42,741 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 381 transitions. [2022-01-31 19:57:42,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.92) internal successors, (294), 74 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 381 transitions. [2022-01-31 19:57:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 19:57:42,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:42,742 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:42,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:57:42,742 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 409886930, now seen corresponding path program 72 times [2022-01-31 19:57:42,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007682636] [2022-01-31 19:57:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:42,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:42,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:42,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:42,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:44,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:44,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007682636] [2022-01-31 19:57:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007682636] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:44,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:57:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438225691] [2022-01-31 19:57:44,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:44,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:57:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:57:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:57:44,623 INFO L87 Difference]: Start difference. First operand 307 states and 381 transitions. Second operand has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:45,819 INFO L93 Difference]: Finished difference Result 691 states and 915 transitions. [2022-01-31 19:57:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:57:45,820 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 19:57:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:45,822 INFO L225 Difference]: With dead ends: 691 [2022-01-31 19:57:45,822 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 19:57:45,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:57:45,822 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1339 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:45,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 522 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 19:57:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 311. [2022-01-31 19:57:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 305 states have (on average 1.2491803278688525) internal successors, (381), 305 states have internal predecessors, (381), 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 19:57:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 386 transitions. [2022-01-31 19:57:45,830 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 386 transitions. Word has length 302 [2022-01-31 19:57:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:45,830 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 386 transitions. [2022-01-31 19:57:45,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.9210526315789473) internal successors, (298), 75 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 386 transitions. [2022-01-31 19:57:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-31 19:57:45,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:45,832 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:57:45,832 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -583588041, now seen corresponding path program 73 times [2022-01-31 19:57:45,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506177471] [2022-01-31 19:57:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:45,835 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:45,836 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:45,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:45,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:47,809 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 19:57:47,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506177471] [2022-01-31 19:57:47,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [506177471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:47,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:47,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:57:47,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868699278] [2022-01-31 19:57:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:47,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:57:47,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:57:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:57:47,810 INFO L87 Difference]: Start difference. First operand 311 states and 386 transitions. Second operand has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:49,048 INFO L93 Difference]: Finished difference Result 700 states and 927 transitions. [2022-01-31 19:57:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:57:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have 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 19:57:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:49,050 INFO L225 Difference]: With dead ends: 700 [2022-01-31 19:57:49,050 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 19:57:49,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:57:49,051 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1650 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:49,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1724 Valid, 539 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 19:57:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 315. [2022-01-31 19:57:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.249190938511327) internal successors, (386), 309 states have internal predecessors, (386), 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 19:57:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 391 transitions. [2022-01-31 19:57:49,059 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 391 transitions. Word has length 306 [2022-01-31 19:57:49,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:49,059 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 391 transitions. [2022-01-31 19:57:49,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.9220779220779223) internal successors, (302), 76 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 391 transitions. [2022-01-31 19:57:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 19:57:49,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:49,060 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:49,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:57:49,061 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -373542116, now seen corresponding path program 74 times [2022-01-31 19:57:49,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:49,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21866649] [2022-01-31 19:57:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:49,073 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:49,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:49,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:49,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,096 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 19:57:51,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21866649] [2022-01-31 19:57:51,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [21866649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:51,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:51,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:57:51,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182551923] [2022-01-31 19:57:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:51,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:57:51,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:57:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:57:51,098 INFO L87 Difference]: Start difference. First operand 315 states and 391 transitions. Second operand has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:52,294 INFO L93 Difference]: Finished difference Result 709 states and 939 transitions. [2022-01-31 19:57:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:57:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 19:57:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:52,296 INFO L225 Difference]: With dead ends: 709 [2022-01-31 19:57:52,296 INFO L226 Difference]: Without dead ends: 697 [2022-01-31 19:57:52,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:57:52,297 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1501 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:52,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 542 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-01-31 19:57:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 319. [2022-01-31 19:57:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 313 states have (on average 1.2492012779552715) internal successors, (391), 313 states have internal predecessors, (391), 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 19:57:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 396 transitions. [2022-01-31 19:57:52,305 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 396 transitions. Word has length 310 [2022-01-31 19:57:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:52,305 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 396 transitions. [2022-01-31 19:57:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.923076923076923) internal successors, (306), 77 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 396 transitions. [2022-01-31 19:57:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-31 19:57:52,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:52,306 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:52,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:57:52,306 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash -748764031, now seen corresponding path program 75 times [2022-01-31 19:57:52,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082583848] [2022-01-31 19:57:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:52,317 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:52,317 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:52,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:52,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:54,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:54,308 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 19:57:54,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:54,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082583848] [2022-01-31 19:57:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082583848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:54,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:54,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:57:54,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43900805] [2022-01-31 19:57:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:54,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:57:54,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:57:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:57:54,311 INFO L87 Difference]: Start difference. First operand 319 states and 396 transitions. Second operand has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:55,507 INFO L93 Difference]: Finished difference Result 718 states and 951 transitions. [2022-01-31 19:57:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:57:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-01-31 19:57:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:55,509 INFO L225 Difference]: With dead ends: 718 [2022-01-31 19:57:55,509 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 19:57:55,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:57:55,510 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1392 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:55,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 553 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 19:57:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 323. [2022-01-31 19:57:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 317 states have (on average 1.249211356466877) internal successors, (396), 317 states have internal predecessors, (396), 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 19:57:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 401 transitions. [2022-01-31 19:57:55,518 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 401 transitions. Word has length 314 [2022-01-31 19:57:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:55,518 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 401 transitions. [2022-01-31 19:57:55,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9240506329113924) internal successors, (310), 78 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 401 transitions. [2022-01-31 19:57:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 19:57:55,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:55,520 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:55,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:57:55,520 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash 484449126, now seen corresponding path program 76 times [2022-01-31 19:57:55,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:55,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112084477] [2022-01-31 19:57:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:55,523 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:55,523 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:55,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:55,561 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:57:57,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:57,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112084477] [2022-01-31 19:57:57,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112084477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:57,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:57,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:57:57,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422624926] [2022-01-31 19:57:57,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:57:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:57,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:57:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:57:57,663 INFO L87 Difference]: Start difference. First operand 323 states and 401 transitions. Second operand has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:58,964 INFO L93 Difference]: Finished difference Result 727 states and 963 transitions. [2022-01-31 19:57:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:57:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 19:57:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:58,966 INFO L225 Difference]: With dead ends: 727 [2022-01-31 19:57:58,966 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 19:57:58,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:57:58,967 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1646 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:58,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 553 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:57:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 19:57:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 327. [2022-01-31 19:57:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 321 states have (on average 1.249221183800623) internal successors, (401), 321 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 19:57:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 406 transitions. [2022-01-31 19:57:58,975 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 406 transitions. Word has length 318 [2022-01-31 19:57:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 406 transitions. [2022-01-31 19:57:58,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.925) internal successors, (314), 79 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:57:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 406 transitions. [2022-01-31 19:57:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-01-31 19:57:58,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:58,977 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:58,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:57:58,977 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:58,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:58,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2040432693, now seen corresponding path program 77 times [2022-01-31 19:57:58,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:58,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498010036] [2022-01-31 19:57:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:58,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:57:58,981 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:57:58,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:59,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,059 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 19:58:01,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:01,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498010036] [2022-01-31 19:58:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498010036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:01,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:01,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:58:01,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326134704] [2022-01-31 19:58:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:01,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:58:01,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:58:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:58:01,062 INFO L87 Difference]: Start difference. First operand 327 states and 406 transitions. Second operand has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:02,310 INFO L93 Difference]: Finished difference Result 736 states and 975 transitions. [2022-01-31 19:58:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:58:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-01-31 19:58:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:02,311 INFO L225 Difference]: With dead ends: 736 [2022-01-31 19:58:02,311 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 19:58:02,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:58:02,312 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1464 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:02,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 573 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 19:58:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 331. [2022-01-31 19:58:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 325 states have (on average 1.2492307692307691) internal successors, (406), 325 states have internal predecessors, (406), 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 19:58:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 411 transitions. [2022-01-31 19:58:02,320 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 411 transitions. Word has length 322 [2022-01-31 19:58:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:02,320 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 411 transitions. [2022-01-31 19:58:02,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 80 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 411 transitions. [2022-01-31 19:58:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 19:58:02,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:02,321 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:02,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:58:02,322 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1566841264, now seen corresponding path program 78 times [2022-01-31 19:58:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759781646] [2022-01-31 19:58:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:02,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:02,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:02,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:02,364 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:04,531 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759781646] [2022-01-31 19:58:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759781646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:04,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:04,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:58:04,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113625410] [2022-01-31 19:58:04,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:04,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:58:04,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:58:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:58:04,533 INFO L87 Difference]: Start difference. First operand 331 states and 411 transitions. Second operand has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:05,922 INFO L93 Difference]: Finished difference Result 745 states and 987 transitions. [2022-01-31 19:58:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:58:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-01-31 19:58:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:05,924 INFO L225 Difference]: With dead ends: 745 [2022-01-31 19:58:05,924 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 19:58:05,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:58:05,925 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1568 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:05,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 566 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 19:58:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 335. [2022-01-31 19:58:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 329 states have (on average 1.249240121580547) internal successors, (411), 329 states have internal predecessors, (411), 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 19:58:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 416 transitions. [2022-01-31 19:58:05,935 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 416 transitions. Word has length 326 [2022-01-31 19:58:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:05,935 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 416 transitions. [2022-01-31 19:58:05,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.926829268292683) internal successors, (322), 81 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 416 transitions. [2022-01-31 19:58:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-01-31 19:58:05,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:05,937 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:05,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:58:05,937 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -859225835, now seen corresponding path program 79 times [2022-01-31 19:58:05,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:05,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430029631] [2022-01-31 19:58:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:05,941 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:05,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:05,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:05,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:08,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430029631] [2022-01-31 19:58:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [430029631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:08,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:08,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:58:08,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562693765] [2022-01-31 19:58:08,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:08,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:58:08,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:58:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:58:08,128 INFO L87 Difference]: Start difference. First operand 335 states and 416 transitions. Second operand has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:09,508 INFO L93 Difference]: Finished difference Result 754 states and 999 transitions. [2022-01-31 19:58:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:58:09,509 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-01-31 19:58:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:09,510 INFO L225 Difference]: With dead ends: 754 [2022-01-31 19:58:09,510 INFO L226 Difference]: Without dead ends: 742 [2022-01-31 19:58:09,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:58:09,511 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1581 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:09,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1661 Valid, 560 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-31 19:58:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 339. [2022-01-31 19:58:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 333 states have (on average 1.2492492492492493) internal successors, (416), 333 states have internal predecessors, (416), 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 19:58:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 421 transitions. [2022-01-31 19:58:09,519 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 421 transitions. Word has length 330 [2022-01-31 19:58:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:09,519 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 421 transitions. [2022-01-31 19:58:09,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.927710843373494) internal successors, (326), 82 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 421 transitions. [2022-01-31 19:58:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 19:58:09,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:09,520 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:09,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:58:09,520 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash 751971834, now seen corresponding path program 80 times [2022-01-31 19:58:09,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:09,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118567327] [2022-01-31 19:58:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:09,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:09,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:09,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:11,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118567327] [2022-01-31 19:58:11,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118567327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:11,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:11,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:58:11,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15318227] [2022-01-31 19:58:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:11,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:58:11,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:58:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:58:11,823 INFO L87 Difference]: Start difference. First operand 339 states and 421 transitions. Second operand has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:13,099 INFO L93 Difference]: Finished difference Result 763 states and 1011 transitions. [2022-01-31 19:58:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:58:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have 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 19:58:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:13,101 INFO L225 Difference]: With dead ends: 763 [2022-01-31 19:58:13,101 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 19:58:13,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:58:13,102 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1748 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:13,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 561 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 19:58:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 343. [2022-01-31 19:58:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 337 states have internal predecessors, (421), 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 19:58:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 426 transitions. [2022-01-31 19:58:13,110 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 426 transitions. Word has length 334 [2022-01-31 19:58:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:13,110 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 426 transitions. [2022-01-31 19:58:13,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9285714285714284) internal successors, (330), 83 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 426 transitions. [2022-01-31 19:58:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-01-31 19:58:13,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:13,112 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:13,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:58:13,112 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1394614367, now seen corresponding path program 81 times [2022-01-31 19:58:13,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959406971] [2022-01-31 19:58:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:13,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:13,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:13,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:15,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:15,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959406971] [2022-01-31 19:58:15,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [959406971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:15,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:15,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:58:15,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706257408] [2022-01-31 19:58:15,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:15,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:58:15,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:58:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:58:15,491 INFO L87 Difference]: Start difference. First operand 343 states and 426 transitions. Second operand has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:16,887 INFO L93 Difference]: Finished difference Result 772 states and 1023 transitions. [2022-01-31 19:58:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:58:16,887 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2022-01-31 19:58:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:16,888 INFO L225 Difference]: With dead ends: 772 [2022-01-31 19:58:16,888 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 19:58:16,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:58:16,889 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1644 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:16,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 570 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:58:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 19:58:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 347. [2022-01-31 19:58:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 341 states have (on average 1.249266862170088) internal successors, (426), 341 states have internal predecessors, (426), 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 19:58:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 431 transitions. [2022-01-31 19:58:16,897 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 431 transitions. Word has length 338 [2022-01-31 19:58:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 431 transitions. [2022-01-31 19:58:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.929411764705882) internal successors, (334), 84 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 431 transitions. [2022-01-31 19:58:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 19:58:16,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:16,899 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:16,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:58:16,899 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash -491497404, now seen corresponding path program 82 times [2022-01-31 19:58:16,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:16,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784349357] [2022-01-31 19:58:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:16,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:16,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:16,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:16,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:19,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:19,220 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 19:58:19,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784349357] [2022-01-31 19:58:19,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784349357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:19,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:19,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:58:19,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807585713] [2022-01-31 19:58:19,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:58:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:58:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:58:19,222 INFO L87 Difference]: Start difference. First operand 347 states and 431 transitions. Second operand has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:20,754 INFO L93 Difference]: Finished difference Result 781 states and 1035 transitions. [2022-01-31 19:58:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 19:58:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 19:58:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:20,756 INFO L225 Difference]: With dead ends: 781 [2022-01-31 19:58:20,756 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 19:58:20,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:58:20,757 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1327 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:20,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 630 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 19:58:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 351. [2022-01-31 19:58:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.2492753623188406) internal successors, (431), 345 states have internal predecessors, (431), 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 19:58:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 436 transitions. [2022-01-31 19:58:20,765 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 436 transitions. Word has length 342 [2022-01-31 19:58:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:20,766 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 436 transitions. [2022-01-31 19:58:20,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.9302325581395348) internal successors, (338), 85 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 436 transitions. [2022-01-31 19:58:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-31 19:58:20,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:20,767 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:20,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:58:20,767 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1678764631, now seen corresponding path program 83 times [2022-01-31 19:58:20,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:20,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3536780] [2022-01-31 19:58:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:20,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:20,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:20,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:20,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,194 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 19:58:23,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:23,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3536780] [2022-01-31 19:58:23,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [3536780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:23,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:23,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 19:58:23,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394755420] [2022-01-31 19:58:23,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:23,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 19:58:23,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:23,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 19:58:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:58:23,197 INFO L87 Difference]: Start difference. First operand 351 states and 436 transitions. Second operand has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:24,747 INFO L93 Difference]: Finished difference Result 790 states and 1047 transitions. [2022-01-31 19:58:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:58:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-01-31 19:58:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:24,749 INFO L225 Difference]: With dead ends: 790 [2022-01-31 19:58:24,749 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 19:58:24,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:58:24,749 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1536 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:24,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 620 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 19:58:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 355. [2022-01-31 19:58:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 349 states have (on average 1.2492836676217765) internal successors, (436), 349 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 19:58:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 441 transitions. [2022-01-31 19:58:24,758 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 441 transitions. Word has length 346 [2022-01-31 19:58:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 441 transitions. [2022-01-31 19:58:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 86 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 441 transitions. [2022-01-31 19:58:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 19:58:24,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:24,759 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:24,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:58:24,760 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1399547762, now seen corresponding path program 84 times [2022-01-31 19:58:24,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:24,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209860258] [2022-01-31 19:58:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:24,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:24,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:24,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:24,808 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:27,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:27,182 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209860258] [2022-01-31 19:58:27,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [209860258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:27,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:27,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 19:58:27,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137849603] [2022-01-31 19:58:27,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:27,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 19:58:27,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 19:58:27,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:58:27,185 INFO L87 Difference]: Start difference. First operand 355 states and 441 transitions. Second operand has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:28,710 INFO L93 Difference]: Finished difference Result 799 states and 1059 transitions. [2022-01-31 19:58:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:58:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 19:58:28,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:28,712 INFO L225 Difference]: With dead ends: 799 [2022-01-31 19:58:28,712 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 19:58:28,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:58:28,713 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1367 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:28,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 644 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 19:58:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 359. [2022-01-31 19:58:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 353 states have (on average 1.2492917847025495) internal successors, (441), 353 states have internal predecessors, (441), 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 19:58:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 446 transitions. [2022-01-31 19:58:28,722 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 446 transitions. Word has length 350 [2022-01-31 19:58:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:28,723 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 446 transitions. [2022-01-31 19:58:28,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9318181818181817) internal successors, (346), 87 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 446 transitions. [2022-01-31 19:58:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-01-31 19:58:28,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:28,724 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:28,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:58:28,724 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:28,724 INFO L85 PathProgramCache]: Analyzing trace with hash -3989261, now seen corresponding path program 85 times [2022-01-31 19:58:28,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144913394] [2022-01-31 19:58:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:28,728 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:28,728 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:28,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:28,803 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:31,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:31,239 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 19:58:31,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144913394] [2022-01-31 19:58:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2144913394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:31,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:31,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:58:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5828671] [2022-01-31 19:58:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:31,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:58:31,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:58:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:58:31,242 INFO L87 Difference]: Start difference. First operand 359 states and 446 transitions. Second operand has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:32,785 INFO L93 Difference]: Finished difference Result 808 states and 1071 transitions. [2022-01-31 19:58:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 19:58:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2022-01-31 19:58:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:32,787 INFO L225 Difference]: With dead ends: 808 [2022-01-31 19:58:32,787 INFO L226 Difference]: Without dead ends: 796 [2022-01-31 19:58:32,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:58:32,788 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1710 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:32,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 605 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-31 19:58:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 363. [2022-01-31 19:58:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 357 states have (on average 1.2492997198879552) internal successors, (446), 357 states have internal predecessors, (446), 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 19:58:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 451 transitions. [2022-01-31 19:58:32,797 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 451 transitions. Word has length 354 [2022-01-31 19:58:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:32,797 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 451 transitions. [2022-01-31 19:58:32,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.932584269662921) internal successors, (350), 88 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 451 transitions. [2022-01-31 19:58:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-31 19:58:32,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:32,799 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:58:32,799 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:32,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1912803624, now seen corresponding path program 86 times [2022-01-31 19:58:32,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:32,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583155800] [2022-01-31 19:58:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:32,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:32,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:32,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:32,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:35,422 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:35,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583155800] [2022-01-31 19:58:35,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583155800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:35,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:35,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:58:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535130250] [2022-01-31 19:58:35,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:35,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:58:35,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:58:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:58:35,425 INFO L87 Difference]: Start difference. First operand 363 states and 451 transitions. Second operand has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:37,116 INFO L93 Difference]: Finished difference Result 817 states and 1083 transitions. [2022-01-31 19:58:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:58:37,117 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2022-01-31 19:58:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:37,118 INFO L225 Difference]: With dead ends: 817 [2022-01-31 19:58:37,118 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 19:58:37,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:58:37,119 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1480 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:37,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 642 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 19:58:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 367. [2022-01-31 19:58:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 361 states have (on average 1.2493074792243768) internal successors, (451), 361 states have internal predecessors, (451), 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 19:58:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 456 transitions. [2022-01-31 19:58:37,128 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 456 transitions. Word has length 358 [2022-01-31 19:58:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:37,128 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 456 transitions. [2022-01-31 19:58:37,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.933333333333333) internal successors, (354), 89 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 456 transitions. [2022-01-31 19:58:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-01-31 19:58:37,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:37,129 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:37,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:58:37,129 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1390198211, now seen corresponding path program 87 times [2022-01-31 19:58:37,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145347642] [2022-01-31 19:58:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:37,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:37,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:37,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:37,181 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:39,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145347642] [2022-01-31 19:58:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145347642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:39,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:39,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 19:58:39,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171363862] [2022-01-31 19:58:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:39,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 19:58:39,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 19:58:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:58:39,707 INFO L87 Difference]: Start difference. First operand 367 states and 456 transitions. Second operand has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:41,391 INFO L93 Difference]: Finished difference Result 826 states and 1095 transitions. [2022-01-31 19:58:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:58:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have 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 19:58:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:41,393 INFO L225 Difference]: With dead ends: 826 [2022-01-31 19:58:41,393 INFO L226 Difference]: Without dead ends: 814 [2022-01-31 19:58:41,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:58:41,394 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1990 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:41,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2078 Valid, 616 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:58:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-31 19:58:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 371. [2022-01-31 19:58:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 365 states have (on average 1.2493150684931507) internal successors, (456), 365 states have internal predecessors, (456), 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 19:58:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 461 transitions. [2022-01-31 19:58:41,402 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 461 transitions. Word has length 362 [2022-01-31 19:58:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:41,403 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 461 transitions. [2022-01-31 19:58:41,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.934065934065934) internal successors, (358), 90 states have internal predecessors, (358), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 461 transitions. [2022-01-31 19:58:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 19:58:41,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:41,404 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:41,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:58:41,404 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1618434850, now seen corresponding path program 88 times [2022-01-31 19:58:41,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:41,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777774491] [2022-01-31 19:58:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:41,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:41,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:41,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:41,495 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:44,063 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 19:58:44,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777774491] [2022-01-31 19:58:44,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777774491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:44,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:44,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:58:44,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468804754] [2022-01-31 19:58:44,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:44,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:58:44,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:58:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:58:44,066 INFO L87 Difference]: Start difference. First operand 371 states and 461 transitions. Second operand has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:45,689 INFO L93 Difference]: Finished difference Result 835 states and 1107 transitions. [2022-01-31 19:58:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 19:58:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 19:58:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:45,691 INFO L225 Difference]: With dead ends: 835 [2022-01-31 19:58:45,691 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 19:58:45,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:58:45,692 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1744 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:45,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1833 Valid, 641 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 19:58:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 375. [2022-01-31 19:58:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 369 states have (on average 1.2493224932249323) internal successors, (461), 369 states have internal predecessors, (461), 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 19:58:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 466 transitions. [2022-01-31 19:58:45,701 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 466 transitions. Word has length 366 [2022-01-31 19:58:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:45,701 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 466 transitions. [2022-01-31 19:58:45,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.9347826086956523) internal successors, (362), 91 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 466 transitions. [2022-01-31 19:58:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2022-01-31 19:58:45,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:45,702 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:45,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:58:45,703 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1466271353, now seen corresponding path program 89 times [2022-01-31 19:58:45,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:45,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670882407] [2022-01-31 19:58:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:45,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:45,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:45,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:45,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:48,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670882407] [2022-01-31 19:58:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670882407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:48,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:48,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 19:58:48,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484413537] [2022-01-31 19:58:48,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:48,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 19:58:48,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 19:58:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:58:48,491 INFO L87 Difference]: Start difference. First operand 375 states and 466 transitions. Second operand has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:50,299 INFO L93 Difference]: Finished difference Result 844 states and 1119 transitions. [2022-01-31 19:58:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 19:58:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 370 [2022-01-31 19:58:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:50,301 INFO L225 Difference]: With dead ends: 844 [2022-01-31 19:58:50,301 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 19:58:50,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4281, Invalid=4461, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:58:50,302 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 1891 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:50,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1981 Valid, 630 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 19:58:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 379. [2022-01-31 19:58:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 373 states have (on average 1.2493297587131367) internal successors, (466), 373 states have internal predecessors, (466), 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 19:58:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 471 transitions. [2022-01-31 19:58:50,311 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 471 transitions. Word has length 370 [2022-01-31 19:58:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:50,311 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 471 transitions. [2022-01-31 19:58:50,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.935483870967742) internal successors, (366), 92 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 471 transitions. [2022-01-31 19:58:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 19:58:50,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:50,313 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:50,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:58:50,313 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash -745677460, now seen corresponding path program 90 times [2022-01-31 19:58:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513630013] [2022-01-31 19:58:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:50,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:50,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:50,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:50,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:53,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:53,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:53,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513630013] [2022-01-31 19:58:53,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [513630013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:53,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:53,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:58:53,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494400925] [2022-01-31 19:58:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:53,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:58:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:53,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:58:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:58:53,128 INFO L87 Difference]: Start difference. First operand 379 states and 471 transitions. Second operand has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:54,858 INFO L93 Difference]: Finished difference Result 853 states and 1131 transitions. [2022-01-31 19:58:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:58:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 374 [2022-01-31 19:58:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:54,860 INFO L225 Difference]: With dead ends: 853 [2022-01-31 19:58:54,860 INFO L226 Difference]: Without dead ends: 841 [2022-01-31 19:58:54,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4374, Invalid=4556, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:58:54,860 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1760 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1851 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:54,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1851 Valid, 652 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-31 19:58:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 383. [2022-01-31 19:58:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 377 states have (on average 1.2493368700265253) internal successors, (471), 377 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 19:58:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 476 transitions. [2022-01-31 19:58:54,870 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 476 transitions. Word has length 374 [2022-01-31 19:58:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:54,870 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 476 transitions. [2022-01-31 19:58:54,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.9361702127659575) internal successors, (370), 93 states have internal predecessors, (370), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 476 transitions. [2022-01-31 19:58:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-01-31 19:58:54,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:54,871 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:54,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:58:54,872 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -860698927, now seen corresponding path program 91 times [2022-01-31 19:58:54,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867209974] [2022-01-31 19:58:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:54,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:54,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:54,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:54,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:58:57,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:57,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867209974] [2022-01-31 19:58:57,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867209974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:57,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:57,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 19:58:57,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481731798] [2022-01-31 19:58:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:57,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 19:58:57,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 19:58:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:58:57,713 INFO L87 Difference]: Start difference. First operand 383 states and 476 transitions. Second operand has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:59,596 INFO L93 Difference]: Finished difference Result 862 states and 1143 transitions. [2022-01-31 19:58:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 19:58:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 378 [2022-01-31 19:58:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:59,598 INFO L225 Difference]: With dead ends: 862 [2022-01-31 19:58:59,598 INFO L226 Difference]: Without dead ends: 850 [2022-01-31 19:58:59,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4468, Invalid=4652, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:58:59,599 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 2133 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:59,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 634 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [852 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:58:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-31 19:58:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 387. [2022-01-31 19:58:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.2493438320209973) internal successors, (476), 381 states have internal predecessors, (476), 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 19:58:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 481 transitions. [2022-01-31 19:58:59,611 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 481 transitions. Word has length 378 [2022-01-31 19:58:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:59,611 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 481 transitions. [2022-01-31 19:58:59,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 94 states have internal predecessors, (374), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:58:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 481 transitions. [2022-01-31 19:58:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 19:58:59,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:59,613 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:59,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:58:59,613 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1825207734, now seen corresponding path program 92 times [2022-01-31 19:58:59,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:59,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540835740] [2022-01-31 19:58:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:59,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:58:59,617 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:58:59,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:59,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:02,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:02,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540835740] [2022-01-31 19:59:02,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540835740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:02,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:02,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 19:59:02,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809478811] [2022-01-31 19:59:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:02,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 19:59:02,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:02,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 19:59:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:59:02,468 INFO L87 Difference]: Start difference. First operand 387 states and 481 transitions. Second operand has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:04,366 INFO L93 Difference]: Finished difference Result 871 states and 1155 transitions. [2022-01-31 19:59:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 19:59:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2022-01-31 19:59:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:04,368 INFO L225 Difference]: With dead ends: 871 [2022-01-31 19:59:04,368 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 19:59:04,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4563, Invalid=4749, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:59:04,369 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1993 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2086 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:04,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2086 Valid, 638 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 19:59:04,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 391. [2022-01-31 19:59:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 385 states have (on average 1.2493506493506494) internal successors, (481), 385 states have internal predecessors, (481), 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 19:59:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 486 transitions. [2022-01-31 19:59:04,378 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 486 transitions. Word has length 382 [2022-01-31 19:59:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:04,378 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 486 transitions. [2022-01-31 19:59:04,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.9375) internal successors, (378), 95 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:04,378 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 486 transitions. [2022-01-31 19:59:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-31 19:59:04,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:04,380 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:04,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:59:04,380 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -906614245, now seen corresponding path program 93 times [2022-01-31 19:59:04,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900091168] [2022-01-31 19:59:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:04,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:04,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:04,452 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:07,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900091168] [2022-01-31 19:59:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900091168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:07,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:59:07,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555757911] [2022-01-31 19:59:07,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:59:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:07,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:59:07,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:59:07,327 INFO L87 Difference]: Start difference. First operand 391 states and 486 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:09,212 INFO L93 Difference]: Finished difference Result 880 states and 1167 transitions. [2022-01-31 19:59:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:59:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 386 [2022-01-31 19:59:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:09,225 INFO L225 Difference]: With dead ends: 880 [2022-01-31 19:59:09,225 INFO L226 Difference]: Without dead ends: 868 [2022-01-31 19:59:09,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:59:09,225 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1767 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:09,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1861 Valid, 683 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-31 19:59:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 395. [2022-01-31 19:59:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 389 states have (on average 1.249357326478149) internal successors, (486), 389 states have internal predecessors, (486), 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 19:59:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 491 transitions. [2022-01-31 19:59:09,236 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 491 transitions. Word has length 386 [2022-01-31 19:59:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 491 transitions. [2022-01-31 19:59:09,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 96 states have internal predecessors, (382), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 491 transitions. [2022-01-31 19:59:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 19:59:09,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:09,238 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:09,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 19:59:09,238 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:09,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2018040832, now seen corresponding path program 94 times [2022-01-31 19:59:09,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:09,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551101089] [2022-01-31 19:59:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:09,242 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:09,242 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:09,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:09,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:12,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:12,196 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 19:59:12,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:12,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551101089] [2022-01-31 19:59:12,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [551101089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:12,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:12,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:59:12,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824270204] [2022-01-31 19:59:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:12,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:59:12,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:59:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:59:12,202 INFO L87 Difference]: Start difference. First operand 395 states and 491 transitions. Second operand has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:14,152 INFO L93 Difference]: Finished difference Result 889 states and 1179 transitions. [2022-01-31 19:59:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 19:59:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have 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 19:59:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:14,154 INFO L225 Difference]: With dead ends: 889 [2022-01-31 19:59:14,154 INFO L226 Difference]: Without dead ends: 877 [2022-01-31 19:59:14,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:59:14,155 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1836 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:14,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1931 Valid, 697 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-31 19:59:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 399. [2022-01-31 19:59:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 393 states have (on average 1.2493638676844783) internal successors, (491), 393 states have internal predecessors, (491), 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 19:59:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 496 transitions. [2022-01-31 19:59:14,165 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 496 transitions. Word has length 390 [2022-01-31 19:59:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 496 transitions. [2022-01-31 19:59:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.938775510204082) internal successors, (386), 97 states have internal predecessors, (386), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 496 transitions. [2022-01-31 19:59:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-01-31 19:59:14,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:14,167 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:14,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 19:59:14,167 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 653173605, now seen corresponding path program 95 times [2022-01-31 19:59:14,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199439849] [2022-01-31 19:59:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:14,171 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:14,171 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:14,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:14,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:17,275 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 19:59:17,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:17,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199439849] [2022-01-31 19:59:17,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [199439849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:17,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:17,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 19:59:17,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559824684] [2022-01-31 19:59:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:17,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 19:59:17,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 19:59:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:59:17,278 INFO L87 Difference]: Start difference. First operand 399 states and 496 transitions. Second operand has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:19,242 INFO L93 Difference]: Finished difference Result 898 states and 1191 transitions. [2022-01-31 19:59:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 19:59:19,243 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 394 [2022-01-31 19:59:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:19,245 INFO L225 Difference]: With dead ends: 898 [2022-01-31 19:59:19,245 INFO L226 Difference]: Without dead ends: 886 [2022-01-31 19:59:19,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4854, Invalid=5046, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:59:19,246 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1840 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:19,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1936 Valid, 673 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:59:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-31 19:59:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 403. [2022-01-31 19:59:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 397 states have (on average 1.2493702770780857) internal successors, (496), 397 states have internal predecessors, (496), 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 19:59:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 501 transitions. [2022-01-31 19:59:19,256 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 501 transitions. Word has length 394 [2022-01-31 19:59:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:19,256 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 501 transitions. [2022-01-31 19:59:19,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.9393939393939394) internal successors, (390), 98 states have internal predecessors, (390), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 501 transitions. [2022-01-31 19:59:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 19:59:19,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:19,258 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:19,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 19:59:19,258 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1440606282, now seen corresponding path program 96 times [2022-01-31 19:59:19,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:19,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737520863] [2022-01-31 19:59:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:19,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:19,262 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:19,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:19,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:22,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737520863] [2022-01-31 19:59:22,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737520863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:22,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:22,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 19:59:22,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741062140] [2022-01-31 19:59:22,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:22,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 19:59:22,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 19:59:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:59:22,382 INFO L87 Difference]: Start difference. First operand 403 states and 501 transitions. Second operand has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:24,504 INFO L93 Difference]: Finished difference Result 907 states and 1203 transitions. [2022-01-31 19:59:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 19:59:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-01-31 19:59:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:24,506 INFO L225 Difference]: With dead ends: 907 [2022-01-31 19:59:24,506 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 19:59:24,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4953, Invalid=5147, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:59:24,507 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 2001 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:24,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2098 Valid, 685 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 19:59:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 407. [2022-01-31 19:59:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.2493765586034913) internal successors, (501), 401 states have internal predecessors, (501), 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 19:59:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 506 transitions. [2022-01-31 19:59:24,516 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 506 transitions. Word has length 398 [2022-01-31 19:59:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:24,517 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 506 transitions. [2022-01-31 19:59:24,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.94) internal successors, (394), 99 states have internal predecessors, (394), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 506 transitions. [2022-01-31 19:59:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-01-31 19:59:24,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:24,518 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:24,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 19:59:24,519 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1076245167, now seen corresponding path program 97 times [2022-01-31 19:59:24,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:24,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938069825] [2022-01-31 19:59:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:24,522 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:24,522 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:24,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:24,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:27,764 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 19:59:27,764 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:27,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938069825] [2022-01-31 19:59:27,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1938069825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:27,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:27,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 19:59:27,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388504108] [2022-01-31 19:59:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:27,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 19:59:27,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 19:59:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:59:27,767 INFO L87 Difference]: Start difference. First operand 407 states and 506 transitions. Second operand has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:29,949 INFO L93 Difference]: Finished difference Result 916 states and 1215 transitions. [2022-01-31 19:59:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 19:59:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 402 [2022-01-31 19:59:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:29,951 INFO L225 Difference]: With dead ends: 916 [2022-01-31 19:59:29,951 INFO L226 Difference]: Without dead ends: 904 [2022-01-31 19:59:29,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5053, Invalid=5249, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:59:29,952 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 2029 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:29,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 690 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-31 19:59:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 411. [2022-01-31 19:59:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 405 states have (on average 1.2493827160493827) internal successors, (506), 405 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 19:59:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 511 transitions. [2022-01-31 19:59:29,962 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 511 transitions. Word has length 402 [2022-01-31 19:59:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:29,962 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 511 transitions. [2022-01-31 19:59:29,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.9405940594059405) internal successors, (398), 100 states have internal predecessors, (398), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 511 transitions. [2022-01-31 19:59:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 19:59:29,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:29,964 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:29,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 19:59:29,964 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:29,964 INFO L85 PathProgramCache]: Analyzing trace with hash -557268332, now seen corresponding path program 98 times [2022-01-31 19:59:29,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:29,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116398783] [2022-01-31 19:59:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:29,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:29,969 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:29,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:30,043 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:33,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:33,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116398783] [2022-01-31 19:59:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116398783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:33,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:33,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:59:33,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074904547] [2022-01-31 19:59:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:33,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:59:33,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:59:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:59:33,158 INFO L87 Difference]: Start difference. First operand 411 states and 511 transitions. Second operand has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:35,489 INFO L93 Difference]: Finished difference Result 925 states and 1227 transitions. [2022-01-31 19:59:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 19:59:35,489 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 19:59:35,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:35,491 INFO L225 Difference]: With dead ends: 925 [2022-01-31 19:59:35,491 INFO L226 Difference]: Without dead ends: 913 [2022-01-31 19:59:35,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5154, Invalid=5352, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:59:35,492 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2167 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:35,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2266 Valid, 686 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-31 19:59:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 415. [2022-01-31 19:59:35,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 409 states have (on average 1.2493887530562346) internal successors, (511), 409 states have internal predecessors, (511), 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 19:59:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 516 transitions. [2022-01-31 19:59:35,502 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 516 transitions. Word has length 406 [2022-01-31 19:59:35,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:35,502 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 516 transitions. [2022-01-31 19:59:35,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.9411764705882355) internal successors, (402), 101 states have internal predecessors, (402), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 516 transitions. [2022-01-31 19:59:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-01-31 19:59:35,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:35,504 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:35,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 19:59:35,504 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1210505209, now seen corresponding path program 99 times [2022-01-31 19:59:35,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:35,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219728770] [2022-01-31 19:59:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:35,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:35,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:35,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:35,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:59:38,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219728770] [2022-01-31 19:59:38,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219728770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:38,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:38,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 19:59:38,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945058129] [2022-01-31 19:59:38,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:38,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 19:59:38,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 19:59:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:59:38,905 INFO L87 Difference]: Start difference. First operand 415 states and 516 transitions. Second operand has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:41,323 INFO L93 Difference]: Finished difference Result 934 states and 1239 transitions. [2022-01-31 19:59:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:59:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 410 [2022-01-31 19:59:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:41,325 INFO L225 Difference]: With dead ends: 934 [2022-01-31 19:59:41,325 INFO L226 Difference]: Without dead ends: 922 [2022-01-31 19:59:41,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5256, Invalid=5456, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:59:41,326 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 2804 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2904 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:41,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2904 Valid, 691 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-31 19:59:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 419. [2022-01-31 19:59:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 413 states have (on average 1.2493946731234866) internal successors, (516), 413 states have internal predecessors, (516), 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 19:59:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 521 transitions. [2022-01-31 19:59:41,336 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 521 transitions. Word has length 410 [2022-01-31 19:59:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:41,336 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 521 transitions. [2022-01-31 19:59:41,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.941747572815534) internal successors, (406), 102 states have internal predecessors, (406), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 521 transitions. [2022-01-31 19:59:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 19:59:41,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:41,338 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:41,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 19:59:41,338 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash 111326, now seen corresponding path program 100 times [2022-01-31 19:59:41,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:41,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467891858] [2022-01-31 19:59:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:41,346 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:41,346 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:41,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:41,419 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:44,722 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 19:59:44,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467891858] [2022-01-31 19:59:44,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467891858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:44,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:44,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 19:59:44,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012784709] [2022-01-31 19:59:44,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 19:59:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 19:59:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:59:44,725 INFO L87 Difference]: Start difference. First operand 419 states and 521 transitions. Second operand has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:47,054 INFO L93 Difference]: Finished difference Result 943 states and 1251 transitions. [2022-01-31 19:59:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 19:59:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 414 [2022-01-31 19:59:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:47,056 INFO L225 Difference]: With dead ends: 943 [2022-01-31 19:59:47,056 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 19:59:47,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5359, Invalid=5561, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:59:47,057 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2436 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2537 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:47,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2537 Valid, 718 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:59:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 19:59:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 423. [2022-01-31 19:59:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.249400479616307) internal successors, (521), 417 states have internal predecessors, (521), 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 19:59:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 526 transitions. [2022-01-31 19:59:47,067 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 526 transitions. Word has length 414 [2022-01-31 19:59:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:47,067 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 526 transitions. [2022-01-31 19:59:47,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.9423076923076925) internal successors, (410), 103 states have internal predecessors, (410), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 526 transitions. [2022-01-31 19:59:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-31 19:59:47,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:47,068 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:47,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 19:59:47,069 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1199215427, now seen corresponding path program 101 times [2022-01-31 19:59:47,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:47,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863733578] [2022-01-31 19:59:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:47,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:47,072 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:47,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:47,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:50,532 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 19:59:50,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863733578] [2022-01-31 19:59:50,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863733578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:50,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:50,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 19:59:50,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13996292] [2022-01-31 19:59:50,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:50,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 19:59:50,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 19:59:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:59:50,534 INFO L87 Difference]: Start difference. First operand 423 states and 526 transitions. Second operand has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:52,894 INFO L93 Difference]: Finished difference Result 952 states and 1263 transitions. [2022-01-31 19:59:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 19:59:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have 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 19:59:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:52,896 INFO L225 Difference]: With dead ends: 952 [2022-01-31 19:59:52,897 INFO L226 Difference]: Without dead ends: 940 [2022-01-31 19:59:52,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5463, Invalid=5667, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:59:52,897 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 2302 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:52,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 704 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-31 19:59:52,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 427. [2022-01-31 19:59:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 421 states have (on average 1.2494061757719714) internal successors, (526), 421 states have internal predecessors, (526), 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 19:59:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 531 transitions. [2022-01-31 19:59:52,908 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 531 transitions. Word has length 418 [2022-01-31 19:59:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:52,908 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 531 transitions. [2022-01-31 19:59:52,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.942857142857143) internal successors, (414), 104 states have internal predecessors, (414), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 531 transitions. [2022-01-31 19:59:52,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 19:59:52,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:52,910 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:52,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 19:59:52,910 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:52,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1829943592, now seen corresponding path program 102 times [2022-01-31 19:59:52,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:52,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802966774] [2022-01-31 19:59:52,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:52,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:52,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:52,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:52,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:56,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:56,413 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 19:59:56,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802966774] [2022-01-31 19:59:56,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802966774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:56,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:56,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 19:59:56,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068885451] [2022-01-31 19:59:56,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:56,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 19:59:56,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 19:59:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:59:56,416 INFO L87 Difference]: Start difference. First operand 427 states and 531 transitions. Second operand has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:58,906 INFO L93 Difference]: Finished difference Result 961 states and 1275 transitions. [2022-01-31 19:59:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 19:59:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 422 [2022-01-31 19:59:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:58,908 INFO L225 Difference]: With dead ends: 961 [2022-01-31 19:59:58,908 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 19:59:58,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5568, Invalid=5774, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:59:58,909 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 2338 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:58,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 707 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:59:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 19:59:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 431. [2022-01-31 19:59:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 425 states have (on average 1.2494117647058824) internal successors, (531), 425 states have internal predecessors, (531), 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 19:59:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 536 transitions. [2022-01-31 19:59:58,919 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 536 transitions. Word has length 422 [2022-01-31 19:59:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:58,919 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 536 transitions. [2022-01-31 19:59:58,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.943396226415094) internal successors, (418), 105 states have internal predecessors, (418), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:59:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 536 transitions. [2022-01-31 19:59:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-31 19:59:58,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:58,921 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:58,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 19:59:58,921 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash 480994445, now seen corresponding path program 103 times [2022-01-31 19:59:58,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:58,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378321489] [2022-01-31 19:59:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:58,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:59:58,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 19:59:58,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:59,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:02,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:02,521 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 20:00:02,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378321489] [2022-01-31 20:00:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1378321489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:02,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:02,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 20:00:02,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848547394] [2022-01-31 20:00:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 20:00:02,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 20:00:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:00:02,524 INFO L87 Difference]: Start difference. First operand 431 states and 536 transitions. Second operand has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:05,145 INFO L93 Difference]: Finished difference Result 970 states and 1287 transitions. [2022-01-31 20:00:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 20:00:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 426 [2022-01-31 20:00:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:05,147 INFO L225 Difference]: With dead ends: 970 [2022-01-31 20:00:05,147 INFO L226 Difference]: Without dead ends: 958 [2022-01-31 20:00:05,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5674, Invalid=5882, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:00:05,148 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 2459 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2563 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:05,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2563 Valid, 744 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:00:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-31 20:00:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 435. [2022-01-31 20:00:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 429 states have (on average 1.2494172494172495) internal successors, (536), 429 states have internal predecessors, (536), 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 20:00:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 541 transitions. [2022-01-31 20:00:05,158 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 541 transitions. Word has length 426 [2022-01-31 20:00:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:05,159 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 541 transitions. [2022-01-31 20:00:05,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.94392523364486) internal successors, (422), 106 states have internal predecessors, (422), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 541 transitions. [2022-01-31 20:00:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 20:00:05,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:05,160 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:05,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 20:00:05,161 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1350183566, now seen corresponding path program 104 times [2022-01-31 20:00:05,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784173336] [2022-01-31 20:00:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:05,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:05,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:05,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:05,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:08,785 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 20:00:08,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784173336] [2022-01-31 20:00:08,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784173336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:08,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:08,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 20:00:08,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165232486] [2022-01-31 20:00:08,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:08,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 20:00:08,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 20:00:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:00:08,788 INFO L87 Difference]: Start difference. First operand 435 states and 541 transitions. Second operand has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:11,347 INFO L93 Difference]: Finished difference Result 979 states and 1299 transitions. [2022-01-31 20:00:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 20:00:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 20:00:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:11,349 INFO L225 Difference]: With dead ends: 979 [2022-01-31 20:00:11,349 INFO L226 Difference]: Without dead ends: 967 [2022-01-31 20:00:11,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5781, Invalid=5991, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:00:11,350 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 2208 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2313 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:11,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2313 Valid, 725 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 20:00:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-01-31 20:00:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 439. [2022-01-31 20:00:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 433 states have (on average 1.2494226327944573) internal successors, (541), 433 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 20:00:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2022-01-31 20:00:11,361 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 430 [2022-01-31 20:00:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:11,361 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2022-01-31 20:00:11,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.9444444444444446) internal successors, (426), 107 states have internal predecessors, (426), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2022-01-31 20:00:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-31 20:00:11,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:11,363 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:11,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 20:00:11,363 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2084785111, now seen corresponding path program 105 times [2022-01-31 20:00:11,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:11,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396795233] [2022-01-31 20:00:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:11,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:11,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:11,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:11,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:15,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:15,265 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 20:00:15,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:15,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396795233] [2022-01-31 20:00:15,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396795233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:15,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:15,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 20:00:15,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417000179] [2022-01-31 20:00:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 20:00:15,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 20:00:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:00:15,269 INFO L87 Difference]: Start difference. First operand 439 states and 546 transitions. Second operand has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:18,275 INFO L93 Difference]: Finished difference Result 988 states and 1311 transitions. [2022-01-31 20:00:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 20:00:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 434 [2022-01-31 20:00:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:18,277 INFO L225 Difference]: With dead ends: 988 [2022-01-31 20:00:18,277 INFO L226 Difference]: Without dead ends: 976 [2022-01-31 20:00:18,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5889, Invalid=6101, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:00:18,278 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 2295 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:18,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2401 Valid, 752 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-31 20:00:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 443. [2022-01-31 20:00:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.2494279176201373) internal successors, (546), 437 states have internal predecessors, (546), 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 20:00:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 551 transitions. [2022-01-31 20:00:18,291 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 551 transitions. Word has length 434 [2022-01-31 20:00:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:18,291 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 551 transitions. [2022-01-31 20:00:18,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.944954128440367) internal successors, (430), 108 states have internal predecessors, (430), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 551 transitions. [2022-01-31 20:00:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 20:00:18,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:18,293 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:18,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 20:00:18,293 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash 652543932, now seen corresponding path program 106 times [2022-01-31 20:00:18,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102811218] [2022-01-31 20:00:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:18,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:18,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:18,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:18,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:22,185 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:22,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102811218] [2022-01-31 20:00:22,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102811218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:22,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:22,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 20:00:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079403873] [2022-01-31 20:00:22,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 20:00:22,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 20:00:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:00:22,188 INFO L87 Difference]: Start difference. First operand 443 states and 551 transitions. Second operand has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:25,061 INFO L93 Difference]: Finished difference Result 997 states and 1323 transitions. [2022-01-31 20:00:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 20:00:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 438 [2022-01-31 20:00:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:25,063 INFO L225 Difference]: With dead ends: 997 [2022-01-31 20:00:25,063 INFO L226 Difference]: Without dead ends: 985 [2022-01-31 20:00:25,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5998, Invalid=6212, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:00:25,064 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 2053 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2160 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2160 Valid, 761 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-31 20:00:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 447. [2022-01-31 20:00:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 441 states have (on average 1.2494331065759636) internal successors, (551), 441 states have internal predecessors, (551), 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 20:00:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 556 transitions. [2022-01-31 20:00:25,075 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 556 transitions. Word has length 438 [2022-01-31 20:00:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:25,075 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 556 transitions. [2022-01-31 20:00:25,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.9454545454545453) internal successors, (434), 109 states have internal predecessors, (434), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 556 transitions. [2022-01-31 20:00:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-01-31 20:00:25,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:25,077 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:25,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 20:00:25,077 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -255047391, now seen corresponding path program 107 times [2022-01-31 20:00:25,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:25,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655726412] [2022-01-31 20:00:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:25,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:25,080 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:25,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:25,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:28,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655726412] [2022-01-31 20:00:28,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [655726412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:28,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:28,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 20:00:28,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265185635] [2022-01-31 20:00:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:28,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 20:00:28,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:28,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 20:00:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:00:28,890 INFO L87 Difference]: Start difference. First operand 447 states and 556 transitions. Second operand has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:31,972 INFO L93 Difference]: Finished difference Result 1006 states and 1335 transitions. [2022-01-31 20:00:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 20:00:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 442 [2022-01-31 20:00:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:31,974 INFO L225 Difference]: With dead ends: 1006 [2022-01-31 20:00:31,974 INFO L226 Difference]: Without dead ends: 994 [2022-01-31 20:00:31,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6108, Invalid=6324, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:00:31,974 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2485 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2593 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:31,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2593 Valid, 740 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-31 20:00:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 451. [2022-01-31 20:00:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 445 states have (on average 1.249438202247191) internal successors, (556), 445 states have internal predecessors, (556), 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 20:00:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 561 transitions. [2022-01-31 20:00:31,985 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 561 transitions. Word has length 442 [2022-01-31 20:00:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:31,986 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 561 transitions. [2022-01-31 20:00:31,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.945945945945946) internal successors, (438), 110 states have internal predecessors, (438), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 561 transitions. [2022-01-31 20:00:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 20:00:31,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:31,987 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:31,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 20:00:31,988 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash 146427910, now seen corresponding path program 108 times [2022-01-31 20:00:31,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:31,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366937260] [2022-01-31 20:00:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:32,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:32,002 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:32,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:32,087 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:35,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:35,888 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 20:00:35,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:35,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366937260] [2022-01-31 20:00:35,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366937260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:35,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:35,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 20:00:35,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670013245] [2022-01-31 20:00:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 20:00:35,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 20:00:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:00:35,892 INFO L87 Difference]: Start difference. First operand 451 states and 561 transitions. Second operand has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:39,233 INFO L93 Difference]: Finished difference Result 1015 states and 1347 transitions. [2022-01-31 20:00:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 20:00:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have 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 20:00:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:39,235 INFO L225 Difference]: With dead ends: 1015 [2022-01-31 20:00:39,235 INFO L226 Difference]: Without dead ends: 1003 [2022-01-31 20:00:39,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6219, Invalid=6437, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:00:39,236 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 2404 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 951 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:39,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2513 Valid, 778 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [951 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-01-31 20:00:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 455. [2022-01-31 20:00:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 449 states have (on average 1.2494432071269488) internal successors, (561), 449 states have internal predecessors, (561), 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 20:00:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 566 transitions. [2022-01-31 20:00:39,247 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 566 transitions. Word has length 446 [2022-01-31 20:00:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:39,247 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 566 transitions. [2022-01-31 20:00:39,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.9464285714285716) internal successors, (442), 111 states have internal predecessors, (442), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 566 transitions. [2022-01-31 20:00:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-01-31 20:00:39,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:39,249 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:39,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 20:00:39,249 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash -623879061, now seen corresponding path program 109 times [2022-01-31 20:00:39,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832679544] [2022-01-31 20:00:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:39,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:39,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:39,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:39,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:00:43,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:43,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832679544] [2022-01-31 20:00:43,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832679544] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:43,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:43,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 20:00:43,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374906246] [2022-01-31 20:00:43,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:43,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 20:00:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 20:00:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:00:43,313 INFO L87 Difference]: Start difference. First operand 455 states and 566 transitions. Second operand has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:46,399 INFO L93 Difference]: Finished difference Result 1024 states and 1359 transitions. [2022-01-31 20:00:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 20:00:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 450 [2022-01-31 20:00:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:46,401 INFO L225 Difference]: With dead ends: 1024 [2022-01-31 20:00:46,401 INFO L226 Difference]: Without dead ends: 1012 [2022-01-31 20:00:46,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6331, Invalid=6551, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:00:46,402 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 2572 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2682 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:46,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2682 Valid, 770 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-31 20:00:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 459. [2022-01-31 20:00:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 453 states have (on average 1.249448123620309) internal successors, (566), 453 states have internal predecessors, (566), 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 20:00:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 571 transitions. [2022-01-31 20:00:46,414 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 571 transitions. Word has length 450 [2022-01-31 20:00:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:46,414 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 571 transitions. [2022-01-31 20:00:46,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.9469026548672566) internal successors, (446), 112 states have internal predecessors, (446), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 571 transitions. [2022-01-31 20:00:46,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-01-31 20:00:46,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:46,416 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:46,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 20:00:46,416 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1620029008, now seen corresponding path program 110 times [2022-01-31 20:00:46,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:46,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113630449] [2022-01-31 20:00:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:46,420 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:46,420 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:46,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:46,500 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:50,571 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 20:00:50,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113630449] [2022-01-31 20:00:50,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113630449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:50,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:50,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 20:00:50,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021055853] [2022-01-31 20:00:50,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:50,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 20:00:50,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 20:00:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:00:50,573 INFO L87 Difference]: Start difference. First operand 459 states and 571 transitions. Second operand has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:53,679 INFO L93 Difference]: Finished difference Result 1033 states and 1371 transitions. [2022-01-31 20:00:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 20:00:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-01-31 20:00:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:53,681 INFO L225 Difference]: With dead ends: 1033 [2022-01-31 20:00:53,681 INFO L226 Difference]: Without dead ends: 1021 [2022-01-31 20:00:53,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6444, Invalid=6666, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:00:53,682 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2089 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2200 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:53,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2200 Valid, 788 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:00:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-31 20:00:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 463. [2022-01-31 20:00:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 457 states have (on average 1.24945295404814) internal successors, (571), 457 states have internal predecessors, (571), 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 20:00:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 576 transitions. [2022-01-31 20:00:53,693 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 576 transitions. Word has length 454 [2022-01-31 20:00:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:53,694 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 576 transitions. [2022-01-31 20:00:53,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.9473684210526314) internal successors, (450), 113 states have internal predecessors, (450), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:00:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 576 transitions. [2022-01-31 20:00:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-01-31 20:00:53,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:53,696 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:53,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 20:00:53,696 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1893303733, now seen corresponding path program 111 times [2022-01-31 20:00:53,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888817375] [2022-01-31 20:00:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:53,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:00:53,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:00:53,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:53,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:57,839 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 20:00:57,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:57,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888817375] [2022-01-31 20:00:57,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [888817375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:57,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:57,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 20:00:57,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621631299] [2022-01-31 20:00:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:57,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 20:00:57,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:57,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 20:00:57,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:00:57,844 INFO L87 Difference]: Start difference. First operand 463 states and 576 transitions. Second operand has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:01,095 INFO L93 Difference]: Finished difference Result 1042 states and 1383 transitions. [2022-01-31 20:01:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 20:01:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 458 [2022-01-31 20:01:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:01,098 INFO L225 Difference]: With dead ends: 1042 [2022-01-31 20:01:01,098 INFO L226 Difference]: Without dead ends: 1030 [2022-01-31 20:01:01,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6558, Invalid=6782, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:01:01,099 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 2247 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2359 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:01,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2359 Valid, 772 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:01:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-31 20:01:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 467. [2022-01-31 20:01:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 461 states have (on average 1.2494577006507592) internal successors, (576), 461 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 20:01:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 581 transitions. [2022-01-31 20:01:01,163 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 581 transitions. Word has length 458 [2022-01-31 20:01:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:01,163 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 581 transitions. [2022-01-31 20:01:01,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.9478260869565216) internal successors, (454), 114 states have internal predecessors, (454), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 581 transitions. [2022-01-31 20:01:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 20:01:01,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:01,165 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:01,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 20:01:01,165 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 267330202, now seen corresponding path program 112 times [2022-01-31 20:01:01,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:01,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210567721] [2022-01-31 20:01:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:01,169 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:01,169 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:01,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:01,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:05,354 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 20:01:05,355 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210567721] [2022-01-31 20:01:05,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210567721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:05,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:05,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 20:01:05,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756184502] [2022-01-31 20:01:05,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:05,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 20:01:05,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 20:01:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 20:01:05,358 INFO L87 Difference]: Start difference. First operand 467 states and 581 transitions. Second operand has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:08,905 INFO L93 Difference]: Finished difference Result 1051 states and 1395 transitions. [2022-01-31 20:01:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 20:01:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 462 [2022-01-31 20:01:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:08,907 INFO L225 Difference]: With dead ends: 1051 [2022-01-31 20:01:08,907 INFO L226 Difference]: Without dead ends: 1039 [2022-01-31 20:01:08,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6673, Invalid=6899, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:01:08,908 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 2337 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:08,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2450 Valid, 796 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:01:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-31 20:01:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 471. [2022-01-31 20:01:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 465 states have (on average 1.249462365591398) internal successors, (581), 465 states have internal predecessors, (581), 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 20:01:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 586 transitions. [2022-01-31 20:01:08,919 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 586 transitions. Word has length 462 [2022-01-31 20:01:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:08,920 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 586 transitions. [2022-01-31 20:01:08,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.9482758620689653) internal successors, (458), 115 states have internal predecessors, (458), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 586 transitions. [2022-01-31 20:01:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-31 20:01:08,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:08,922 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:08,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 20:01:08,922 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1083063041, now seen corresponding path program 113 times [2022-01-31 20:01:08,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:08,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229190601] [2022-01-31 20:01:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:08,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:08,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:08,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:09,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:13,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229190601] [2022-01-31 20:01:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229190601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:13,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:13,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 20:01:13,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431812879] [2022-01-31 20:01:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:13,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 20:01:13,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 20:01:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:01:13,265 INFO L87 Difference]: Start difference. First operand 471 states and 586 transitions. Second operand has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:16,576 INFO L93 Difference]: Finished difference Result 1060 states and 1407 transitions. [2022-01-31 20:01:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 20:01:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 466 [2022-01-31 20:01:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:16,578 INFO L225 Difference]: With dead ends: 1060 [2022-01-31 20:01:16,578 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 20:01:16,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6789, Invalid=7017, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:01:16,579 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 2129 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 814 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2243 Valid, 820 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:01:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 20:01:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 475. [2022-01-31 20:01:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 469 states have (on average 1.2494669509594882) internal successors, (586), 469 states have internal predecessors, (586), 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 20:01:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 591 transitions. [2022-01-31 20:01:16,591 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 591 transitions. Word has length 466 [2022-01-31 20:01:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 591 transitions. [2022-01-31 20:01:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.948717948717949) internal successors, (462), 116 states have internal predecessors, (462), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 591 transitions. [2022-01-31 20:01:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 20:01:16,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:16,593 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:16,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 20:01:16,593 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -832394012, now seen corresponding path program 114 times [2022-01-31 20:01:16,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:16,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418939241] [2022-01-31 20:01:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:16,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:16,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:16,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:21,187 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:21,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418939241] [2022-01-31 20:01:21,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [418939241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:21,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:21,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 20:01:21,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100975533] [2022-01-31 20:01:21,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:21,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 20:01:21,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 20:01:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:01:21,189 INFO L87 Difference]: Start difference. First operand 475 states and 591 transitions. Second operand has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:24,549 INFO L93 Difference]: Finished difference Result 1069 states and 1419 transitions. [2022-01-31 20:01:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 20:01:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 470 [2022-01-31 20:01:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:24,551 INFO L225 Difference]: With dead ends: 1069 [2022-01-31 20:01:24,551 INFO L226 Difference]: Without dead ends: 1057 [2022-01-31 20:01:24,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6906, Invalid=7136, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:01:24,552 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2682 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 1072 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1072 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:24,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 801 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1072 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:01:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-31 20:01:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 479. [2022-01-31 20:01:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 473 states have (on average 1.2494714587737843) internal successors, (591), 473 states have internal predecessors, (591), 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 20:01:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 596 transitions. [2022-01-31 20:01:24,564 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 596 transitions. Word has length 470 [2022-01-31 20:01:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:24,564 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 596 transitions. [2022-01-31 20:01:24,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.9491525423728815) internal successors, (466), 117 states have internal predecessors, (466), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 596 transitions. [2022-01-31 20:01:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-01-31 20:01:24,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:24,566 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:24,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 20:01:24,566 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1457317303, now seen corresponding path program 115 times [2022-01-31 20:01:24,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:24,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258473181] [2022-01-31 20:01:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:24,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:24,569 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:24,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:24,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:28,939 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 20:01:28,939 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:28,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258473181] [2022-01-31 20:01:28,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258473181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:28,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:28,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 20:01:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724409569] [2022-01-31 20:01:28,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 20:01:28,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 20:01:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:01:28,943 INFO L87 Difference]: Start difference. First operand 479 states and 596 transitions. Second operand has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:32,676 INFO L93 Difference]: Finished difference Result 1078 states and 1431 transitions. [2022-01-31 20:01:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 20:01:32,676 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have 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 20:01:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:32,678 INFO L225 Difference]: With dead ends: 1078 [2022-01-31 20:01:32,678 INFO L226 Difference]: Without dead ends: 1066 [2022-01-31 20:01:32,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7024, Invalid=7256, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:01:32,679 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 2744 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2860 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:32,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2860 Valid, 814 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1113 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:01:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-31 20:01:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 483. [2022-01-31 20:01:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 477 states have (on average 1.249475890985325) internal successors, (596), 477 states have internal predecessors, (596), 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 20:01:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 601 transitions. [2022-01-31 20:01:32,691 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 601 transitions. Word has length 474 [2022-01-31 20:01:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:32,691 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 601 transitions. [2022-01-31 20:01:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.9495798319327733) internal successors, (470), 118 states have internal predecessors, (470), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 601 transitions. [2022-01-31 20:01:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-31 20:01:32,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:32,693 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:32,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 20:01:32,693 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash 695487790, now seen corresponding path program 116 times [2022-01-31 20:01:32,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:32,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35673293] [2022-01-31 20:01:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:32,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:32,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:32,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:32,806 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:37,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35673293] [2022-01-31 20:01:37,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [35673293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:37,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:37,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 20:01:37,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587891525] [2022-01-31 20:01:37,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:37,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 20:01:37,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 20:01:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:01:37,157 INFO L87 Difference]: Start difference. First operand 483 states and 601 transitions. Second operand has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:40,843 INFO L93 Difference]: Finished difference Result 1087 states and 1443 transitions. [2022-01-31 20:01:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 20:01:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 478 [2022-01-31 20:01:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:40,845 INFO L225 Difference]: With dead ends: 1087 [2022-01-31 20:01:40,845 INFO L226 Difference]: Without dead ends: 1075 [2022-01-31 20:01:40,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7143, Invalid=7377, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:01:40,846 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 2435 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2552 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:40,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2552 Valid, 813 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-31 20:01:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 487. [2022-01-31 20:01:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 481 states have (on average 1.2494802494802495) internal successors, (601), 481 states have internal predecessors, (601), 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 20:01:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 606 transitions. [2022-01-31 20:01:40,858 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 606 transitions. Word has length 478 [2022-01-31 20:01:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 606 transitions. [2022-01-31 20:01:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.95) internal successors, (474), 119 states have internal predecessors, (474), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 606 transitions. [2022-01-31 20:01:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-01-31 20:01:40,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:40,861 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:40,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 20:01:40,861 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -428374637, now seen corresponding path program 117 times [2022-01-31 20:01:40,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:40,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934431092] [2022-01-31 20:01:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:40,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:40,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:40,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:40,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:45,414 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934431092] [2022-01-31 20:01:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934431092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:45,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:45,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 20:01:45,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016704160] [2022-01-31 20:01:45,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:45,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 20:01:45,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 20:01:45,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:01:45,419 INFO L87 Difference]: Start difference. First operand 487 states and 606 transitions. Second operand has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:49,371 INFO L93 Difference]: Finished difference Result 1096 states and 1455 transitions. [2022-01-31 20:01:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 20:01:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 482 [2022-01-31 20:01:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:49,373 INFO L225 Difference]: With dead ends: 1096 [2022-01-31 20:01:49,373 INFO L226 Difference]: Without dead ends: 1084 [2022-01-31 20:01:49,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7263, Invalid=7499, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:01:49,374 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 2458 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:49,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 830 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [958 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 20:01:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-01-31 20:01:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 491. [2022-01-31 20:01:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 485 states have (on average 1.2494845360824742) internal successors, (606), 485 states have internal predecessors, (606), 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 20:01:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 611 transitions. [2022-01-31 20:01:49,386 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 611 transitions. Word has length 482 [2022-01-31 20:01:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:49,386 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 611 transitions. [2022-01-31 20:01:49,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.950413223140496) internal successors, (478), 120 states have internal predecessors, (478), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 611 transitions. [2022-01-31 20:01:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 20:01:49,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:49,388 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:49,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 20:01:49,388 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:49,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2068970632, now seen corresponding path program 118 times [2022-01-31 20:01:49,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:49,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246974364] [2022-01-31 20:01:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:49,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:49,393 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:49,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:49,509 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:01:54,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246974364] [2022-01-31 20:01:54,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246974364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:54,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:54,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 20:01:54,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304457795] [2022-01-31 20:01:54,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:54,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 20:01:54,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 20:01:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:01:54,050 INFO L87 Difference]: Start difference. First operand 491 states and 611 transitions. Second operand has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:57,920 INFO L93 Difference]: Finished difference Result 1105 states and 1467 transitions. [2022-01-31 20:01:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 20:01:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 20:01:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:57,922 INFO L225 Difference]: With dead ends: 1105 [2022-01-31 20:01:57,922 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 20:01:57,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=7384, Invalid=7622, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:01:57,923 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 2687 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2806 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:57,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2806 Valid, 827 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:01:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 20:01:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 495. [2022-01-31 20:01:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.2494887525562373) internal successors, (611), 489 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 20:01:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 616 transitions. [2022-01-31 20:01:57,935 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 616 transitions. Word has length 486 [2022-01-31 20:01:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:57,936 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 616 transitions. [2022-01-31 20:01:57,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.9508196721311477) internal successors, (482), 121 states have internal predecessors, (482), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:01:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 616 transitions. [2022-01-31 20:01:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2022-01-31 20:01:57,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:57,938 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:57,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 20:01:57,938 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash 100206301, now seen corresponding path program 119 times [2022-01-31 20:01:57,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:57,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316888742] [2022-01-31 20:01:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:57,941 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:01:57,941 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:01:57,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:58,051 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:02,673 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 20:02:02,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316888742] [2022-01-31 20:02:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316888742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:02,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 20:02:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577815276] [2022-01-31 20:02:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 20:02:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:02,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 20:02:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:02:02,677 INFO L87 Difference]: Start difference. First operand 495 states and 616 transitions. Second operand has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:06,919 INFO L93 Difference]: Finished difference Result 1114 states and 1479 transitions. [2022-01-31 20:02:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 20:02:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 490 [2022-01-31 20:02:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:06,926 INFO L225 Difference]: With dead ends: 1114 [2022-01-31 20:02:06,926 INFO L226 Difference]: Without dead ends: 1102 [2022-01-31 20:02:06,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7506, Invalid=7746, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:02:06,927 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 2357 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2477 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:06,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2477 Valid, 845 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-31 20:02:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 499. [2022-01-31 20:02:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 493 states have (on average 1.2494929006085194) internal successors, (616), 493 states have internal predecessors, (616), 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 20:02:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 621 transitions. [2022-01-31 20:02:06,939 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 621 transitions. Word has length 490 [2022-01-31 20:02:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 621 transitions. [2022-01-31 20:02:06,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.951219512195122) internal successors, (486), 122 states have internal predecessors, (486), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 621 transitions. [2022-01-31 20:02:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 20:02:06,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:06,942 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:06,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 20:02:06,942 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash 429510594, now seen corresponding path program 120 times [2022-01-31 20:02:06,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:06,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637474754] [2022-01-31 20:02:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:06,945 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:06,945 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:06,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:07,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:11,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637474754] [2022-01-31 20:02:11,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637474754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:11,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:11,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 20:02:11,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242646922] [2022-01-31 20:02:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:11,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 20:02:11,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 20:02:11,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:02:11,862 INFO L87 Difference]: Start difference. First operand 499 states and 621 transitions. Second operand has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:15,788 INFO L93 Difference]: Finished difference Result 1123 states and 1491 transitions. [2022-01-31 20:02:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 20:02:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 494 [2022-01-31 20:02:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:15,790 INFO L225 Difference]: With dead ends: 1123 [2022-01-31 20:02:15,790 INFO L226 Difference]: Without dead ends: 1111 [2022-01-31 20:02:15,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7629, Invalid=7871, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:02:15,791 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 2826 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2947 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:15,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2947 Valid, 854 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-31 20:02:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 503. [2022-01-31 20:02:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.2494969818913482) internal successors, (621), 497 states have internal predecessors, (621), 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 20:02:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 626 transitions. [2022-01-31 20:02:15,803 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 626 transitions. Word has length 494 [2022-01-31 20:02:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:15,804 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 626 transitions. [2022-01-31 20:02:15,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 123 states have internal predecessors, (490), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 626 transitions. [2022-01-31 20:02:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-01-31 20:02:15,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:15,806 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:15,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 20:02:15,806 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1815191079, now seen corresponding path program 121 times [2022-01-31 20:02:15,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:15,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099429899] [2022-01-31 20:02:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:15,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:15,810 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:15,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:15,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:20,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:20,625 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 20:02:20,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:20,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099429899] [2022-01-31 20:02:20,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2099429899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:20,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:20,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 20:02:20,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282746521] [2022-01-31 20:02:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:20,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 20:02:20,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 20:02:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 20:02:20,628 INFO L87 Difference]: Start difference. First operand 503 states and 626 transitions. Second operand has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:24,509 INFO L93 Difference]: Finished difference Result 1132 states and 1503 transitions. [2022-01-31 20:02:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 20:02:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 498 [2022-01-31 20:02:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:24,511 INFO L225 Difference]: With dead ends: 1132 [2022-01-31 20:02:24,511 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 20:02:24,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7753, Invalid=7997, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:02:24,512 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2972 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3094 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:24,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3094 Valid, 838 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 20:02:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 507. [2022-01-31 20:02:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 501 states have (on average 1.249500998003992) internal successors, (626), 501 states have internal predecessors, (626), 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 20:02:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 631 transitions. [2022-01-31 20:02:24,525 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 631 transitions. Word has length 498 [2022-01-31 20:02:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 631 transitions. [2022-01-31 20:02:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.952) internal successors, (494), 124 states have internal predecessors, (494), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 631 transitions. [2022-01-31 20:02:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 20:02:24,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:24,527 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:24,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 20:02:24,528 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash -138300916, now seen corresponding path program 122 times [2022-01-31 20:02:24,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913885630] [2022-01-31 20:02:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:24,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:24,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:24,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:24,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:29,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:29,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913885630] [2022-01-31 20:02:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [913885630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:29,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 20:02:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679659192] [2022-01-31 20:02:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 20:02:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 20:02:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:02:29,409 INFO L87 Difference]: Start difference. First operand 507 states and 631 transitions. Second operand has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:33,509 INFO L93 Difference]: Finished difference Result 1141 states and 1515 transitions. [2022-01-31 20:02:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 20:02:33,509 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have 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 20:02:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:33,511 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 20:02:33,511 INFO L226 Difference]: Without dead ends: 1129 [2022-01-31 20:02:33,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7878, Invalid=8124, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:02:33,512 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2882 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3005 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:33,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3005 Valid, 859 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-31 20:02:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 511. [2022-01-31 20:02:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 505 states have (on average 1.2495049504950495) internal successors, (631), 505 states have internal predecessors, (631), 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 20:02:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 636 transitions. [2022-01-31 20:02:33,525 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 636 transitions. Word has length 502 [2022-01-31 20:02:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:33,525 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 636 transitions. [2022-01-31 20:02:33,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.9523809523809526) internal successors, (498), 125 states have internal predecessors, (498), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 636 transitions. [2022-01-31 20:02:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2022-01-31 20:02:33,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:33,527 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 20:02:33,527 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1403734897, now seen corresponding path program 123 times [2022-01-31 20:02:33,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:33,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561879387] [2022-01-31 20:02:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:33,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:33,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:33,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:33,646 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:38,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:38,417 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 20:02:38,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561879387] [2022-01-31 20:02:38,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561879387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:38,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:38,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 20:02:38,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548297423] [2022-01-31 20:02:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:38,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 20:02:38,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 20:02:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 20:02:38,422 INFO L87 Difference]: Start difference. First operand 511 states and 636 transitions. Second operand has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:42,685 INFO L93 Difference]: Finished difference Result 1150 states and 1527 transitions. [2022-01-31 20:02:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 20:02:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 506 [2022-01-31 20:02:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:42,687 INFO L225 Difference]: With dead ends: 1150 [2022-01-31 20:02:42,687 INFO L226 Difference]: Without dead ends: 1138 [2022-01-31 20:02:42,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8004, Invalid=8252, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:02:42,688 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 2822 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2946 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:42,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2946 Valid, 873 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-31 20:02:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 515. [2022-01-31 20:02:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 509 states have (on average 1.2495088408644401) internal successors, (636), 509 states have internal predecessors, (636), 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 20:02:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 641 transitions. [2022-01-31 20:02:42,702 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 641 transitions. Word has length 506 [2022-01-31 20:02:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:42,702 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 641 transitions. [2022-01-31 20:02:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.952755905511811) internal successors, (502), 126 states have internal predecessors, (502), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 641 transitions. [2022-01-31 20:02:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 20:02:42,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:42,704 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:42,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 20:02:42,705 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:42,705 INFO L85 PathProgramCache]: Analyzing trace with hash 78621270, now seen corresponding path program 124 times [2022-01-31 20:02:42,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:42,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210559064] [2022-01-31 20:02:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:42,709 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:42,709 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:42,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:42,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:47,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:47,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210559064] [2022-01-31 20:02:47,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [210559064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:47,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:47,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 20:02:47,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912934545] [2022-01-31 20:02:47,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:47,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 20:02:47,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:47,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 20:02:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:02:47,705 INFO L87 Difference]: Start difference. First operand 515 states and 641 transitions. Second operand has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:52,065 INFO L93 Difference]: Finished difference Result 1159 states and 1539 transitions. [2022-01-31 20:02:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 20:02:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 510 [2022-01-31 20:02:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:52,067 INFO L225 Difference]: With dead ends: 1159 [2022-01-31 20:02:52,067 INFO L226 Difference]: Without dead ends: 1147 [2022-01-31 20:02:52,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8131, Invalid=8381, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:02:52,068 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 2653 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:52,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2778 Valid, 876 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:02:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-01-31 20:02:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 519. [2022-01-31 20:02:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 513 states have (on average 1.2495126705653021) internal successors, (641), 513 states have internal predecessors, (641), 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 20:02:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 646 transitions. [2022-01-31 20:02:52,081 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 646 transitions. Word has length 510 [2022-01-31 20:02:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 646 transitions. [2022-01-31 20:02:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.953125) internal successors, (506), 127 states have internal predecessors, (506), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:02:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 646 transitions. [2022-01-31 20:02:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2022-01-31 20:02:52,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:52,084 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:52,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 20:02:52,084 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash -856682821, now seen corresponding path program 125 times [2022-01-31 20:02:52,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:52,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880903118] [2022-01-31 20:02:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:52,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:02:52,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:02:52,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:52,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:57,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:02:57,247 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880903118] [2022-01-31 20:02:57,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880903118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:57,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:57,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 20:02:57,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601983998] [2022-01-31 20:02:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 20:02:57,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 20:02:57,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 20:02:57,250 INFO L87 Difference]: Start difference. First operand 519 states and 646 transitions. Second operand has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:01,795 INFO L93 Difference]: Finished difference Result 1168 states and 1551 transitions. [2022-01-31 20:03:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 20:03:01,795 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 514 [2022-01-31 20:03:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:01,797 INFO L225 Difference]: With dead ends: 1168 [2022-01-31 20:03:01,797 INFO L226 Difference]: Without dead ends: 1156 [2022-01-31 20:03:01,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8259, Invalid=8511, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:03:01,798 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2856 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 1142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2982 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1142 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:01,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2982 Valid, 869 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1142 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:03:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-01-31 20:03:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 523. [2022-01-31 20:03:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 517 states have (on average 1.2495164410058026) internal successors, (646), 517 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 20:03:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 651 transitions. [2022-01-31 20:03:01,811 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 651 transitions. Word has length 514 [2022-01-31 20:03:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:01,812 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 651 transitions. [2022-01-31 20:03:01,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.953488372093023) internal successors, (510), 128 states have internal predecessors, (510), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 651 transitions. [2022-01-31 20:03:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 20:03:01,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:01,814 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:01,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 20:03:01,814 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:01,814 INFO L85 PathProgramCache]: Analyzing trace with hash -68306784, now seen corresponding path program 126 times [2022-01-31 20:03:01,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:01,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942769005] [2022-01-31 20:03:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:01,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:01,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:01,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:01,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:06,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:07,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942769005] [2022-01-31 20:03:07,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942769005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:07,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:07,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 20:03:07,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079248082] [2022-01-31 20:03:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:07,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 20:03:07,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 20:03:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 20:03:07,008 INFO L87 Difference]: Start difference. First operand 523 states and 651 transitions. Second operand has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:11,471 INFO L93 Difference]: Finished difference Result 1177 states and 1563 transitions. [2022-01-31 20:03:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 20:03:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 518 [2022-01-31 20:03:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:11,473 INFO L225 Difference]: With dead ends: 1177 [2022-01-31 20:03:11,474 INFO L226 Difference]: Without dead ends: 1165 [2022-01-31 20:03:11,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:03:11,475 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2458 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 2399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:11,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 871 Invalid, 2399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-01-31 20:03:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 527. [2022-01-31 20:03:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 521 states have (on average 1.2495201535508638) internal successors, (651), 521 states have internal predecessors, (651), 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 20:03:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 656 transitions. [2022-01-31 20:03:11,488 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 656 transitions. Word has length 518 [2022-01-31 20:03:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:11,488 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 656 transitions. [2022-01-31 20:03:11,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.953846153846154) internal successors, (514), 129 states have internal predecessors, (514), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 656 transitions. [2022-01-31 20:03:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-01-31 20:03:11,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:11,490 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:11,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 20:03:11,491 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1098258427, now seen corresponding path program 127 times [2022-01-31 20:03:11,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:11,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334930253] [2022-01-31 20:03:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:11,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:11,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:11,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:11,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:16,973 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 20:03:16,973 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334930253] [2022-01-31 20:03:16,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [334930253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:16,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:16,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 20:03:16,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521194109] [2022-01-31 20:03:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:16,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 20:03:16,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 20:03:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 20:03:16,976 INFO L87 Difference]: Start difference. First operand 527 states and 656 transitions. Second operand has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:21,302 INFO L93 Difference]: Finished difference Result 1186 states and 1575 transitions. [2022-01-31 20:03:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 20:03:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 522 [2022-01-31 20:03:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:21,304 INFO L225 Difference]: With dead ends: 1186 [2022-01-31 20:03:21,304 INFO L226 Difference]: Without dead ends: 1174 [2022-01-31 20:03:21,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8518, Invalid=8774, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:03:21,305 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2714 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 1060 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2842 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:21,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2842 Valid, 893 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-31 20:03:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 531. [2022-01-31 20:03:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.2495238095238095) internal successors, (656), 525 states have internal predecessors, (656), 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 20:03:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 661 transitions. [2022-01-31 20:03:21,319 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 661 transitions. Word has length 522 [2022-01-31 20:03:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:21,319 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 661 transitions. [2022-01-31 20:03:21,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.954198473282443) internal successors, (518), 130 states have internal predecessors, (518), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 661 transitions. [2022-01-31 20:03:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 20:03:21,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:21,321 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:21,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 20:03:21,321 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:21,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1862655210, now seen corresponding path program 128 times [2022-01-31 20:03:21,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:21,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400580447] [2022-01-31 20:03:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:21,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:21,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:21,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:26,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400580447] [2022-01-31 20:03:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400580447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:26,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:26,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 20:03:26,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982243348] [2022-01-31 20:03:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:26,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 20:03:26,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 20:03:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 20:03:26,700 INFO L87 Difference]: Start difference. First operand 531 states and 661 transitions. Second operand has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:31,345 INFO L93 Difference]: Finished difference Result 1195 states and 1587 transitions. [2022-01-31 20:03:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 20:03:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 20:03:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:31,348 INFO L225 Difference]: With dead ends: 1195 [2022-01-31 20:03:31,348 INFO L226 Difference]: Without dead ends: 1183 [2022-01-31 20:03:31,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8649, Invalid=8907, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:03:31,349 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3017 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3146 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:31,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3146 Valid, 910 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1220 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-31 20:03:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 535. [2022-01-31 20:03:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 529 states have (on average 1.2495274102079394) internal successors, (661), 529 states have internal predecessors, (661), 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 20:03:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 666 transitions. [2022-01-31 20:03:31,362 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 666 transitions. Word has length 526 [2022-01-31 20:03:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:31,362 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 666 transitions. [2022-01-31 20:03:31,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.9545454545454546) internal successors, (522), 131 states have internal predecessors, (522), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 666 transitions. [2022-01-31 20:03:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-31 20:03:31,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:31,365 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 20:03:31,365 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash -452798641, now seen corresponding path program 129 times [2022-01-31 20:03:31,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111593446] [2022-01-31 20:03:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:31,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:31,378 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:31,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:31,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:36,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:36,779 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 20:03:36,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111593446] [2022-01-31 20:03:36,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [111593446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:36,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:36,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 20:03:36,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931063868] [2022-01-31 20:03:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:36,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 20:03:36,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 20:03:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 20:03:36,783 INFO L87 Difference]: Start difference. First operand 535 states and 666 transitions. Second operand has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:42,212 INFO L93 Difference]: Finished difference Result 1204 states and 1599 transitions. [2022-01-31 20:03:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 20:03:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have 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 20:03:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:42,214 INFO L225 Difference]: With dead ends: 1204 [2022-01-31 20:03:42,214 INFO L226 Difference]: Without dead ends: 1192 [2022-01-31 20:03:42,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8781, Invalid=9041, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:03:42,215 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 2772 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 1094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2902 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1094 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:42,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2902 Valid, 917 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1094 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:03:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-01-31 20:03:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 539. [2022-01-31 20:03:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 533 states have (on average 1.24953095684803) internal successors, (666), 533 states have internal predecessors, (666), 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 20:03:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 671 transitions. [2022-01-31 20:03:42,229 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 671 transitions. Word has length 530 [2022-01-31 20:03:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:42,229 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 671 transitions. [2022-01-31 20:03:42,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.954887218045113) internal successors, (526), 132 states have internal predecessors, (526), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 671 transitions. [2022-01-31 20:03:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-01-31 20:03:42,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:42,231 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:42,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 20:03:42,231 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:42,231 INFO L85 PathProgramCache]: Analyzing trace with hash -981330124, now seen corresponding path program 130 times [2022-01-31 20:03:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672187576] [2022-01-31 20:03:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:42,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:42,235 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:42,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:42,357 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:03:47,896 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672187576] [2022-01-31 20:03:47,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672187576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:47,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 20:03:47,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989669480] [2022-01-31 20:03:47,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:47,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 20:03:47,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 20:03:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 20:03:47,899 INFO L87 Difference]: Start difference. First operand 539 states and 671 transitions. Second operand has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:52,542 INFO L93 Difference]: Finished difference Result 1213 states and 1611 transitions. [2022-01-31 20:03:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 20:03:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 534 [2022-01-31 20:03:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:52,544 INFO L225 Difference]: With dead ends: 1213 [2022-01-31 20:03:52,544 INFO L226 Difference]: Without dead ends: 1201 [2022-01-31 20:03:52,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8914, Invalid=9176, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:03:52,545 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 3020 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 1218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3151 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1218 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:52,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3151 Valid, 917 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1218 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 20:03:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-31 20:03:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 543. [2022-01-31 20:03:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 537 states have (on average 1.2495344506517692) internal successors, (671), 537 states have internal predecessors, (671), 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 20:03:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 676 transitions. [2022-01-31 20:03:52,559 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 676 transitions. Word has length 534 [2022-01-31 20:03:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:52,559 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 676 transitions. [2022-01-31 20:03:52,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.955223880597015) internal successors, (530), 133 states have internal predecessors, (530), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:03:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 676 transitions. [2022-01-31 20:03:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-01-31 20:03:52,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:52,561 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:52,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 20:03:52,562 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:52,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash -756753255, now seen corresponding path program 131 times [2022-01-31 20:03:52,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:52,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288453319] [2022-01-31 20:03:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:52,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:03:52,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:03:52,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:52,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:58,251 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 20:03:58,251 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:58,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288453319] [2022-01-31 20:03:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1288453319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:58,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:58,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 20:03:58,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979900614] [2022-01-31 20:03:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:58,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 20:03:58,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 20:03:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 20:03:58,255 INFO L87 Difference]: Start difference. First operand 543 states and 676 transitions. Second operand has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:02,989 INFO L93 Difference]: Finished difference Result 1222 states and 1623 transitions. [2022-01-31 20:04:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 20:04:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 538 [2022-01-31 20:04:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:02,991 INFO L225 Difference]: With dead ends: 1222 [2022-01-31 20:04:02,991 INFO L226 Difference]: Without dead ends: 1210 [2022-01-31 20:04:02,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9048, Invalid=9312, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:04:02,992 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 2780 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 1092 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2912 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1092 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:02,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2912 Valid, 909 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1092 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-01-31 20:04:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 547. [2022-01-31 20:04:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 541 states have (on average 1.2495378927911276) internal successors, (676), 541 states have internal predecessors, (676), 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 20:04:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 681 transitions. [2022-01-31 20:04:03,006 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 681 transitions. Word has length 538 [2022-01-31 20:04:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:03,006 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 681 transitions. [2022-01-31 20:04:03,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.9555555555555557) internal successors, (534), 134 states have internal predecessors, (534), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 681 transitions. [2022-01-31 20:04:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 20:04:03,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:03,009 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:03,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 20:04:03,009 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1022125950, now seen corresponding path program 132 times [2022-01-31 20:04:03,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:03,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164608706] [2022-01-31 20:04:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:03,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:03,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:03,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:08,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:08,634 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164608706] [2022-01-31 20:04:08,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164608706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:08,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:08,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 20:04:08,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002190091] [2022-01-31 20:04:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:08,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 20:04:08,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 20:04:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 20:04:08,639 INFO L87 Difference]: Start difference. First operand 547 states and 681 transitions. Second operand has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:13,608 INFO L93 Difference]: Finished difference Result 1231 states and 1635 transitions. [2022-01-31 20:04:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 20:04:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 542 [2022-01-31 20:04:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:13,610 INFO L225 Difference]: With dead ends: 1231 [2022-01-31 20:04:13,611 INFO L226 Difference]: Without dead ends: 1219 [2022-01-31 20:04:13,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9183, Invalid=9449, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:04:13,612 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 2900 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 1147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3033 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1147 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:13,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3033 Valid, 927 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1147 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-31 20:04:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 551. [2022-01-31 20:04:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 545 states have (on average 1.2495412844036697) internal successors, (681), 545 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 20:04:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 686 transitions. [2022-01-31 20:04:13,626 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 686 transitions. Word has length 542 [2022-01-31 20:04:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:13,626 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 686 transitions. [2022-01-31 20:04:13,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.9558823529411766) internal successors, (538), 135 states have internal predecessors, (538), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:13,626 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 686 transitions. [2022-01-31 20:04:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-01-31 20:04:13,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:13,628 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:13,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 20:04:13,629 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -256247837, now seen corresponding path program 133 times [2022-01-31 20:04:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595292691] [2022-01-31 20:04:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:13,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:13,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:13,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:13,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:19,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:19,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:19,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595292691] [2022-01-31 20:04:19,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [595292691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:19,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:19,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 20:04:19,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577787780] [2022-01-31 20:04:19,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:19,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 20:04:19,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 20:04:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 20:04:19,457 INFO L87 Difference]: Start difference. First operand 551 states and 686 transitions. Second operand has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:24,412 INFO L93 Difference]: Finished difference Result 1240 states and 1647 transitions. [2022-01-31 20:04:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 20:04:24,413 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 546 [2022-01-31 20:04:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:24,415 INFO L225 Difference]: With dead ends: 1240 [2022-01-31 20:04:24,415 INFO L226 Difference]: Without dead ends: 1228 [2022-01-31 20:04:24,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9319, Invalid=9587, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:04:24,416 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 3323 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 1349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3457 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1349 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:24,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3457 Valid, 934 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1349 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-31 20:04:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 555. [2022-01-31 20:04:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 549 states have (on average 1.2495446265938068) internal successors, (686), 549 states have internal predecessors, (686), 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 20:04:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 691 transitions. [2022-01-31 20:04:24,430 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 691 transitions. Word has length 546 [2022-01-31 20:04:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:24,430 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 691 transitions. [2022-01-31 20:04:24,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.9562043795620436) internal successors, (542), 136 states have internal predecessors, (542), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 691 transitions. [2022-01-31 20:04:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 20:04:24,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:24,433 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:24,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 20:04:24,433 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -389100088, now seen corresponding path program 134 times [2022-01-31 20:04:24,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193165196] [2022-01-31 20:04:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:24,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:24,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:24,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:24,590 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:30,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:30,277 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:30,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193165196] [2022-01-31 20:04:30,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193165196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:30,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:30,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 20:04:30,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879625874] [2022-01-31 20:04:30,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:30,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 20:04:30,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 20:04:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 20:04:30,281 INFO L87 Difference]: Start difference. First operand 555 states and 691 transitions. Second operand has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:35,377 INFO L93 Difference]: Finished difference Result 1249 states and 1659 transitions. [2022-01-31 20:04:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 20:04:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 550 [2022-01-31 20:04:35,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:35,379 INFO L225 Difference]: With dead ends: 1249 [2022-01-31 20:04:35,379 INFO L226 Difference]: Without dead ends: 1237 [2022-01-31 20:04:35,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9456, Invalid=9726, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:04:35,380 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2809 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2944 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:35,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2944 Valid, 965 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-31 20:04:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 559. [2022-01-31 20:04:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 553 states have (on average 1.2495479204339963) internal successors, (691), 553 states have internal predecessors, (691), 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 20:04:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 696 transitions. [2022-01-31 20:04:35,395 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 696 transitions. Word has length 550 [2022-01-31 20:04:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:35,395 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 696 transitions. [2022-01-31 20:04:35,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 3.9565217391304346) internal successors, (546), 137 states have internal predecessors, (546), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 696 transitions. [2022-01-31 20:04:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-01-31 20:04:35,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:35,398 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:35,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 20:04:35,398 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2097948973, now seen corresponding path program 135 times [2022-01-31 20:04:35,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:35,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885485682] [2022-01-31 20:04:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:35,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:35,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:35,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:35,555 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:04:41,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885485682] [2022-01-31 20:04:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885485682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:41,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 20:04:41,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18535551] [2022-01-31 20:04:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 20:04:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 20:04:41,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 20:04:41,283 INFO L87 Difference]: Start difference. First operand 559 states and 696 transitions. Second operand has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:46,548 INFO L93 Difference]: Finished difference Result 1258 states and 1671 transitions. [2022-01-31 20:04:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 20:04:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 554 [2022-01-31 20:04:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:46,550 INFO L225 Difference]: With dead ends: 1258 [2022-01-31 20:04:46,550 INFO L226 Difference]: Without dead ends: 1246 [2022-01-31 20:04:46,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9594, Invalid=9866, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:04:46,551 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3392 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:46,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3528 Valid, 936 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-01-31 20:04:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 563. [2022-01-31 20:04:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 557 states have (on average 1.2495511669658887) internal successors, (696), 557 states have internal predecessors, (696), 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 20:04:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 701 transitions. [2022-01-31 20:04:46,566 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 701 transitions. Word has length 554 [2022-01-31 20:04:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:46,566 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 701 transitions. [2022-01-31 20:04:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 3.9568345323741005) internal successors, (550), 138 states have internal predecessors, (550), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 701 transitions. [2022-01-31 20:04:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 20:04:46,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:46,568 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:46,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 20:04:46,569 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1296872942, now seen corresponding path program 136 times [2022-01-31 20:04:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973593059] [2022-01-31 20:04:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:46,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:46,572 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:46,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:46,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:52,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:52,618 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 20:04:52,618 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:52,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973593059] [2022-01-31 20:04:52,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973593059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:52,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:52,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 20:04:52,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789746335] [2022-01-31 20:04:52,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 20:04:52,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 20:04:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 20:04:52,621 INFO L87 Difference]: Start difference. First operand 563 states and 701 transitions. Second operand has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:58,352 INFO L93 Difference]: Finished difference Result 1267 states and 1683 transitions. [2022-01-31 20:04:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 20:04:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have 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 20:04:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:58,354 INFO L225 Difference]: With dead ends: 1267 [2022-01-31 20:04:58,354 INFO L226 Difference]: Without dead ends: 1255 [2022-01-31 20:04:58,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9733, Invalid=10007, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:04:58,355 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 2794 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2931 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:58,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2931 Valid, 951 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:04:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2022-01-31 20:04:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 567. [2022-01-31 20:04:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.249554367201426) internal successors, (701), 561 states have internal predecessors, (701), 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 20:04:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 706 transitions. [2022-01-31 20:04:58,370 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 706 transitions. Word has length 558 [2022-01-31 20:04:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 706 transitions. [2022-01-31 20:04:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.9571428571428573) internal successors, (554), 139 states have internal predecessors, (554), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:04:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 706 transitions. [2022-01-31 20:04:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2022-01-31 20:04:58,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:58,372 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:58,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 20:04:58,373 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1939509129, now seen corresponding path program 137 times [2022-01-31 20:04:58,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543669686] [2022-01-31 20:04:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:58,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:04:58,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:04:58,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:58,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:04,426 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543669686] [2022-01-31 20:05:04,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543669686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:04,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:04,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 20:05:04,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346183734] [2022-01-31 20:05:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:04,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 20:05:04,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:04,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 20:05:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 20:05:04,430 INFO L87 Difference]: Start difference. First operand 567 states and 706 transitions. Second operand has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:09,999 INFO L93 Difference]: Finished difference Result 1276 states and 1695 transitions. [2022-01-31 20:05:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 20:05:10,000 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 562 [2022-01-31 20:05:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:10,002 INFO L225 Difference]: With dead ends: 1276 [2022-01-31 20:05:10,002 INFO L226 Difference]: Without dead ends: 1264 [2022-01-31 20:05:10,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9873, Invalid=10149, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:05:10,003 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 2560 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:10,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2698 Valid, 972 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:05:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-01-31 20:05:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 571. [2022-01-31 20:05:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 565 states have (on average 1.2495575221238937) internal successors, (706), 565 states have internal predecessors, (706), 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 20:05:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 711 transitions. [2022-01-31 20:05:10,018 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 711 transitions. Word has length 562 [2022-01-31 20:05:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:10,018 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 711 transitions. [2022-01-31 20:05:10,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 140 states have internal predecessors, (558), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 711 transitions. [2022-01-31 20:05:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 20:05:10,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:10,021 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:10,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 20:05:10,021 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1512299612, now seen corresponding path program 138 times [2022-01-31 20:05:10,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:10,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325771561] [2022-01-31 20:05:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:10,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:10,025 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:10,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:10,183 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:16,237 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 20:05:16,237 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:16,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325771561] [2022-01-31 20:05:16,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325771561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:16,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:16,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 20:05:16,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228785521] [2022-01-31 20:05:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:16,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 20:05:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 20:05:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 20:05:16,241 INFO L87 Difference]: Start difference. First operand 571 states and 711 transitions. Second operand has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:21,704 INFO L93 Difference]: Finished difference Result 1285 states and 1707 transitions. [2022-01-31 20:05:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 20:05:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 566 [2022-01-31 20:05:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:21,706 INFO L225 Difference]: With dead ends: 1285 [2022-01-31 20:05:21,706 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 20:05:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=10014, Invalid=10292, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:05:21,707 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2836 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2975 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:21,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2975 Valid, 969 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:05:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 20:05:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 575. [2022-01-31 20:05:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 569 states have (on average 1.249560632688928) internal successors, (711), 569 states have internal predecessors, (711), 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 20:05:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 716 transitions. [2022-01-31 20:05:21,722 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 716 transitions. Word has length 566 [2022-01-31 20:05:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:21,723 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 716 transitions. [2022-01-31 20:05:21,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.9577464788732395) internal successors, (562), 141 states have internal predecessors, (562), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 716 transitions. [2022-01-31 20:05:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-01-31 20:05:21,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:21,726 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:21,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 20:05:21,726 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash 156224961, now seen corresponding path program 139 times [2022-01-31 20:05:21,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534100280] [2022-01-31 20:05:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:21,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:21,733 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:21,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:21,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:28,042 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 20:05:28,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:28,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534100280] [2022-01-31 20:05:28,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534100280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:28,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:28,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 20:05:28,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162066183] [2022-01-31 20:05:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:28,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 20:05:28,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 20:05:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 20:05:28,046 INFO L87 Difference]: Start difference. First operand 575 states and 716 transitions. Second operand has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:33,765 INFO L93 Difference]: Finished difference Result 1294 states and 1719 transitions. [2022-01-31 20:05:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 20:05:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 570 [2022-01-31 20:05:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:33,767 INFO L225 Difference]: With dead ends: 1294 [2022-01-31 20:05:33,767 INFO L226 Difference]: Without dead ends: 1282 [2022-01-31 20:05:33,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10156, Invalid=10436, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:05:33,768 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 3882 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4022 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1622 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:33,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4022 Valid, 980 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1622 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:05:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-31 20:05:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 579. [2022-01-31 20:05:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 573 states have (on average 1.24956369982548) internal successors, (716), 573 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 20:05:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 721 transitions. [2022-01-31 20:05:33,796 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 721 transitions. Word has length 570 [2022-01-31 20:05:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:33,796 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 721 transitions. [2022-01-31 20:05:33,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.958041958041958) internal successors, (566), 142 states have internal predecessors, (566), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 721 transitions. [2022-01-31 20:05:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-01-31 20:05:33,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:33,799 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:33,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 20:05:33,799 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1957332134, now seen corresponding path program 140 times [2022-01-31 20:05:33,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:33,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531551456] [2022-01-31 20:05:33,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:33,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:33,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:33,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:33,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:05:40,163 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:40,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531551456] [2022-01-31 20:05:40,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531551456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:40,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 20:05:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364445796] [2022-01-31 20:05:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 20:05:40,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 20:05:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 20:05:40,166 INFO L87 Difference]: Start difference. First operand 579 states and 721 transitions. Second operand has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:45,595 INFO L93 Difference]: Finished difference Result 1303 states and 1731 transitions. [2022-01-31 20:05:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 20:05:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-01-31 20:05:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:45,598 INFO L225 Difference]: With dead ends: 1303 [2022-01-31 20:05:45,598 INFO L226 Difference]: Without dead ends: 1291 [2022-01-31 20:05:45,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=10299, Invalid=10581, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:05:45,599 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 2712 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2853 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:45,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2853 Valid, 989 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:05:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-01-31 20:05:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 583. [2022-01-31 20:05:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 577 states have (on average 1.2495667244367417) internal successors, (721), 577 states have internal predecessors, (721), 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 20:05:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 726 transitions. [2022-01-31 20:05:45,614 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 726 transitions. Word has length 574 [2022-01-31 20:05:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:45,615 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 726 transitions. [2022-01-31 20:05:45,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.9583333333333335) internal successors, (570), 143 states have internal predecessors, (570), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 726 transitions. [2022-01-31 20:05:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2022-01-31 20:05:45,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:45,617 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:45,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 20:05:45,617 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1269481205, now seen corresponding path program 141 times [2022-01-31 20:05:45,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:45,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045970712] [2022-01-31 20:05:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:45,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:45,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:45,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:45,780 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:52,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:52,548 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 20:05:52,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045970712] [2022-01-31 20:05:52,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045970712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:52,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:52,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 20:05:52,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536487503] [2022-01-31 20:05:52,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:52,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 20:05:52,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 20:05:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 20:05:52,554 INFO L87 Difference]: Start difference. First operand 583 states and 726 transitions. Second operand has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:58,913 INFO L93 Difference]: Finished difference Result 1312 states and 1743 transitions. [2022-01-31 20:05:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 20:05:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 578 [2022-01-31 20:05:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:58,916 INFO L225 Difference]: With dead ends: 1312 [2022-01-31 20:05:58,916 INFO L226 Difference]: Without dead ends: 1300 [2022-01-31 20:05:58,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=10443, Invalid=10727, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:05:58,917 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 3424 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3566 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:58,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3566 Valid, 996 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1387 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:05:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-31 20:05:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 587. [2022-01-31 20:05:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 581 states have (on average 1.2495697074010328) internal successors, (726), 581 states have internal predecessors, (726), 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 20:05:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 731 transitions. [2022-01-31 20:05:58,933 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 731 transitions. Word has length 578 [2022-01-31 20:05:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:58,934 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 731 transitions. [2022-01-31 20:05:58,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.9586206896551723) internal successors, (574), 144 states have internal predecessors, (574), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:05:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 731 transitions. [2022-01-31 20:05:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 20:05:58,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:58,936 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 20:05:58,937 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1842430704, now seen corresponding path program 142 times [2022-01-31 20:05:58,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139863713] [2022-01-31 20:05:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:58,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:05:58,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:05:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:59,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:05,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:05,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139863713] [2022-01-31 20:06:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139863713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:05,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 20:06:05,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713277857] [2022-01-31 20:06:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:05,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 20:06:05,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 20:06:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 20:06:05,502 INFO L87 Difference]: Start difference. First operand 587 states and 731 transitions. Second operand has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:12,547 INFO L93 Difference]: Finished difference Result 1321 states and 1755 transitions. [2022-01-31 20:06:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 20:06:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 20:06:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:12,550 INFO L225 Difference]: With dead ends: 1321 [2022-01-31 20:06:12,550 INFO L226 Difference]: Without dead ends: 1309 [2022-01-31 20:06:12,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=10588, Invalid=10874, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:06:12,551 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 3320 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 1329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1329 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:12,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 1002 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1329 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:06:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-01-31 20:06:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 591. [2022-01-31 20:06:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 585 states have (on average 1.2495726495726496) internal successors, (731), 585 states have internal predecessors, (731), 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 20:06:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 736 transitions. [2022-01-31 20:06:12,567 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 736 transitions. Word has length 582 [2022-01-31 20:06:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:12,567 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 736 transitions. [2022-01-31 20:06:12,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.958904109589041) internal successors, (578), 145 states have internal predecessors, (578), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 736 transitions. [2022-01-31 20:06:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-31 20:06:12,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:12,570 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:12,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 20:06:12,570 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash 603966037, now seen corresponding path program 143 times [2022-01-31 20:06:12,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:12,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287767111] [2022-01-31 20:06:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:12,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:12,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:12,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:12,732 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:19,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287767111] [2022-01-31 20:06:19,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1287767111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:19,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:19,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 20:06:19,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543114742] [2022-01-31 20:06:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:19,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 20:06:19,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 20:06:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 20:06:19,136 INFO L87 Difference]: Start difference. First operand 591 states and 736 transitions. Second operand has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:26,447 INFO L93 Difference]: Finished difference Result 1330 states and 1767 transitions. [2022-01-31 20:06:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 20:06:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have 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 20:06:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:26,450 INFO L225 Difference]: With dead ends: 1330 [2022-01-31 20:06:26,450 INFO L226 Difference]: Without dead ends: 1318 [2022-01-31 20:06:26,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=10734, Invalid=11022, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:06:26,451 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 3017 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 1182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3161 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1182 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:26,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3161 Valid, 1009 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1182 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 20:06:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-01-31 20:06:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 595. [2022-01-31 20:06:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 589 states have (on average 1.2495755517826825) internal successors, (736), 589 states have internal predecessors, (736), 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 20:06:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 741 transitions. [2022-01-31 20:06:26,466 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 741 transitions. Word has length 586 [2022-01-31 20:06:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:26,467 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 741 transitions. [2022-01-31 20:06:26,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.9591836734693877) internal successors, (582), 146 states have internal predecessors, (582), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 741 transitions. [2022-01-31 20:06:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 20:06:26,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:26,469 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:26,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 20:06:26,470 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:26,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2027808966, now seen corresponding path program 144 times [2022-01-31 20:06:26,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:26,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924264773] [2022-01-31 20:06:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:26,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:26,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:26,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:26,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:33,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:06:33,472 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924264773] [2022-01-31 20:06:33,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924264773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:33,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:33,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 20:06:33,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555624957] [2022-01-31 20:06:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:33,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 20:06:33,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 20:06:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 20:06:33,477 INFO L87 Difference]: Start difference. First operand 595 states and 741 transitions. Second operand has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:41,678 INFO L93 Difference]: Finished difference Result 1339 states and 1779 transitions. [2022-01-31 20:06:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 20:06:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 590 [2022-01-31 20:06:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:41,681 INFO L225 Difference]: With dead ends: 1339 [2022-01-31 20:06:41,681 INFO L226 Difference]: Without dead ends: 1327 [2022-01-31 20:06:41,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10881, Invalid=11171, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:06:41,682 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 3422 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 1370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1370 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:41,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3567 Valid, 1004 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1370 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:06:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-01-31 20:06:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 599. [2022-01-31 20:06:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 593 states have (on average 1.2495784148397977) internal successors, (741), 593 states have internal predecessors, (741), 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 20:06:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 746 transitions. [2022-01-31 20:06:41,698 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 746 transitions. Word has length 590 [2022-01-31 20:06:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 746 transitions. [2022-01-31 20:06:41,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.9594594594594597) internal successors, (586), 147 states have internal predecessors, (586), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 746 transitions. [2022-01-31 20:06:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-01-31 20:06:41,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:41,701 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:41,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 20:06:41,701 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash -992384609, now seen corresponding path program 145 times [2022-01-31 20:06:41,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:41,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061191299] [2022-01-31 20:06:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:41,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:41,705 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:41,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:41,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,447 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 20:06:48,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061191299] [2022-01-31 20:06:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061191299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:48,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:48,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 20:06:48,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992257392] [2022-01-31 20:06:48,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:48,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 20:06:48,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 20:06:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 20:06:48,453 INFO L87 Difference]: Start difference. First operand 599 states and 746 transitions. Second operand has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:56,511 INFO L93 Difference]: Finished difference Result 1348 states and 1791 transitions. [2022-01-31 20:06:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 20:06:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 594 [2022-01-31 20:06:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:56,513 INFO L225 Difference]: With dead ends: 1348 [2022-01-31 20:06:56,513 INFO L226 Difference]: Without dead ends: 1336 [2022-01-31 20:06:56,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=11029, Invalid=11321, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 20:06:56,514 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 3075 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3221 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:56,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3221 Valid, 1024 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:06:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-01-31 20:06:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 603. [2022-01-31 20:06:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 597 states have (on average 1.2495812395309882) internal successors, (746), 597 states have internal predecessors, (746), 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 20:06:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 751 transitions. [2022-01-31 20:06:56,596 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 751 transitions. Word has length 594 [2022-01-31 20:06:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:56,596 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 751 transitions. [2022-01-31 20:06:56,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.959731543624161) internal successors, (590), 148 states have internal predecessors, (590), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:06:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 751 transitions. [2022-01-31 20:06:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-01-31 20:06:56,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:56,599 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:56,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 20:06:56,599 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash -668532348, now seen corresponding path program 146 times [2022-01-31 20:06:56,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:56,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867207211] [2022-01-31 20:06:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:56,614 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:06:56,614 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:06:56,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:56,784 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,367 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 20:07:03,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867207211] [2022-01-31 20:07:03,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [867207211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:03,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:03,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 20:07:03,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028283469] [2022-01-31 20:07:03,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:03,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 20:07:03,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 20:07:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 20:07:03,372 INFO L87 Difference]: Start difference. First operand 603 states and 751 transitions. Second operand has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:11,729 INFO L93 Difference]: Finished difference Result 1357 states and 1803 transitions. [2022-01-31 20:07:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 20:07:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 598 [2022-01-31 20:07:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:11,731 INFO L225 Difference]: With dead ends: 1357 [2022-01-31 20:07:11,731 INFO L226 Difference]: Without dead ends: 1345 [2022-01-31 20:07:11,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=11178, Invalid=11472, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:07:11,732 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2991 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3138 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:11,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3138 Valid, 1019 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 20:07:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-01-31 20:07:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 607. [2022-01-31 20:07:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 601 states have (on average 1.2495840266222962) internal successors, (751), 601 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 20:07:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 756 transitions. [2022-01-31 20:07:11,748 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 756 transitions. Word has length 598 [2022-01-31 20:07:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 756 transitions. [2022-01-31 20:07:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.96) internal successors, (594), 149 states have internal predecessors, (594), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 756 transitions. [2022-01-31 20:07:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2022-01-31 20:07:11,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:11,751 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:11,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 20:07:11,752 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash -647225623, now seen corresponding path program 147 times [2022-01-31 20:07:11,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:11,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671254021] [2022-01-31 20:07:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:11,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:11,755 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:11,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:11,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:18,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:18,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671254021] [2022-01-31 20:07:18,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671254021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:18,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:18,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 20:07:18,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432903973] [2022-01-31 20:07:18,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:18,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 20:07:18,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:18,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 20:07:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 20:07:18,593 INFO L87 Difference]: Start difference. First operand 607 states and 756 transitions. Second operand has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:26,755 INFO L93 Difference]: Finished difference Result 1366 states and 1815 transitions. [2022-01-31 20:07:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 20:07:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 602 [2022-01-31 20:07:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:26,757 INFO L225 Difference]: With dead ends: 1366 [2022-01-31 20:07:26,757 INFO L226 Difference]: Without dead ends: 1354 [2022-01-31 20:07:26,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11328, Invalid=11624, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 20:07:26,758 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 3462 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3610 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:26,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3610 Valid, 1021 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:07:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-31 20:07:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 611. [2022-01-31 20:07:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 605 states have (on average 1.2495867768595041) internal successors, (756), 605 states have internal predecessors, (756), 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 20:07:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 761 transitions. [2022-01-31 20:07:26,775 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 761 transitions. Word has length 602 [2022-01-31 20:07:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:26,775 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 761 transitions. [2022-01-31 20:07:26,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.9602649006622515) internal successors, (598), 150 states have internal predecessors, (598), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 761 transitions. [2022-01-31 20:07:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 20:07:26,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:26,778 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:26,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 20:07:26,778 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1315570126, now seen corresponding path program 148 times [2022-01-31 20:07:26,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:26,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866137437] [2022-01-31 20:07:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:26,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:26,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:26,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:26,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:33,859 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 20:07:33,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866137437] [2022-01-31 20:07:33,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [866137437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:33,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:33,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 20:07:33,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552227517] [2022-01-31 20:07:33,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:33,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 20:07:33,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:33,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 20:07:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 20:07:33,865 INFO L87 Difference]: Start difference. First operand 611 states and 761 transitions. Second operand has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:42,032 INFO L93 Difference]: Finished difference Result 1375 states and 1827 transitions. [2022-01-31 20:07:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 20:07:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 606 [2022-01-31 20:07:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:42,035 INFO L225 Difference]: With dead ends: 1375 [2022-01-31 20:07:42,035 INFO L226 Difference]: Without dead ends: 1363 [2022-01-31 20:07:42,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=11479, Invalid=11777, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 20:07:42,036 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 3289 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3438 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:42,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3438 Valid, 1071 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:07:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2022-01-31 20:07:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 615. [2022-01-31 20:07:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 609 states have (on average 1.2495894909688012) internal successors, (761), 609 states have internal predecessors, (761), 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 20:07:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 766 transitions. [2022-01-31 20:07:42,053 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 766 transitions. Word has length 606 [2022-01-31 20:07:42,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:42,053 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 766 transitions. [2022-01-31 20:07:42,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 3.960526315789474) internal successors, (602), 151 states have internal predecessors, (602), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 766 transitions. [2022-01-31 20:07:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2022-01-31 20:07:42,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:42,056 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:42,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 20:07:42,056 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2051140147, now seen corresponding path program 149 times [2022-01-31 20:07:42,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769567945] [2022-01-31 20:07:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:42,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:42,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:42,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:42,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:49,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:07:49,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:49,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769567945] [2022-01-31 20:07:49,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [769567945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:49,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:49,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 20:07:49,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958438355] [2022-01-31 20:07:49,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:49,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 20:07:49,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 20:07:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 20:07:49,236 INFO L87 Difference]: Start difference. First operand 615 states and 766 transitions. Second operand has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:57,826 INFO L93 Difference]: Finished difference Result 1384 states and 1839 transitions. [2022-01-31 20:07:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 20:07:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 610 [2022-01-31 20:07:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:57,828 INFO L225 Difference]: With dead ends: 1384 [2022-01-31 20:07:57,828 INFO L226 Difference]: Without dead ends: 1372 [2022-01-31 20:07:57,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=11631, Invalid=11931, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 20:07:57,829 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 3216 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:57,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3366 Valid, 1045 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:07:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-01-31 20:07:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 619. [2022-01-31 20:07:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 613 states have (on average 1.2495921696574226) internal successors, (766), 613 states have internal predecessors, (766), 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 20:07:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 771 transitions. [2022-01-31 20:07:57,846 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 771 transitions. Word has length 610 [2022-01-31 20:07:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:57,846 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 771 transitions. [2022-01-31 20:07:57,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 3.9607843137254903) internal successors, (606), 152 states have internal predecessors, (606), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:07:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 771 transitions. [2022-01-31 20:07:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-01-31 20:07:57,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:57,849 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 150, 150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:57,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 20:07:57,850 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1384835048, now seen corresponding path program 150 times [2022-01-31 20:07:57,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:57,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838151519] [2022-01-31 20:07:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:57,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:07:57,853 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:07:57,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:58,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:05,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838151519] [2022-01-31 20:08:05,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838151519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:05,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:05,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 20:08:05,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648181106] [2022-01-31 20:08:05,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:05,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 20:08:05,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 20:08:05,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 20:08:05,015 INFO L87 Difference]: Start difference. First operand 619 states and 771 transitions. Second operand has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:14,354 INFO L93 Difference]: Finished difference Result 1393 states and 1851 transitions. [2022-01-31 20:08:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 20:08:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 3 states have 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 20:08:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:14,356 INFO L225 Difference]: With dead ends: 1393 [2022-01-31 20:08:14,356 INFO L226 Difference]: Without dead ends: 1381 [2022-01-31 20:08:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11784, Invalid=12086, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 20:08:14,357 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 3111 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 1224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1224 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:14,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3262 Valid, 1075 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1224 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 20:08:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-01-31 20:08:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 623. [2022-01-31 20:08:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 617 states have (on average 1.2495948136142625) internal successors, (771), 617 states have internal predecessors, (771), 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 20:08:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 776 transitions. [2022-01-31 20:08:14,374 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 776 transitions. Word has length 614 [2022-01-31 20:08:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:14,374 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 776 transitions. [2022-01-31 20:08:14,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.961038961038961) internal successors, (610), 153 states have internal predecessors, (610), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 20:08:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 776 transitions. [2022-01-31 20:08:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-01-31 20:08:14,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:14,377 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 151, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:14,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 20:08:14,377 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1780167811, now seen corresponding path program 151 times [2022-01-31 20:08:14,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478764684] [2022-01-31 20:08:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:14,389 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 20:08:14,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 20:08:14,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:14,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:21,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 20:08:21,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478764684] [2022-01-31 20:08:21,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478764684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:21,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:21,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 20:08:21,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884236600] [2022-01-31 20:08:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:21,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 20:08:21,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 20:08:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 20:08:21,704 INFO L87 Difference]: Start difference. First operand 623 states and 776 transitions. Second operand has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 154 states have internal predecessors, (614), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)