/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-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:09:51,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:09:51,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:09:51,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:09:51,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:09:51,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:09:51,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:09:51,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:09:51,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:09:51,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:09:51,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:09:51,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:09:51,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:09:51,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:09:51,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:09:51,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:09:51,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:09:51,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:09:51,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:09:51,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:09:51,490 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 19:09:51,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:09:51,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:09:51,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:09:51,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:09:51,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:09:51,507 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:09:51,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:09:51,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:09:51,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:09:51,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:09:51,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:09:51,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:09:51,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:09:51,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:09:51,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:09:51,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:09:51,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:09:51,509 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:09:51,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:09:51,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:09:51,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:09:51,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:09:51,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:09:51,717 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:09:51,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2022-01-31 19:09:51,775 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8577a4396/a4e571b00a36443baba6b7fa6575b4fb/FLAGd6dc2c01c [2022-01-31 19:09:52,201 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:09:52,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-2.i [2022-01-31 19:09:52,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8577a4396/a4e571b00a36443baba6b7fa6575b4fb/FLAGd6dc2c01c [2022-01-31 19:09:52,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8577a4396/a4e571b00a36443baba6b7fa6575b4fb [2022-01-31 19:09:52,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:09:52,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:09:52,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:09:52,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:09:52,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:09:52,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670e7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52, skipping insertion in model container [2022-01-31 19:09:52,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:09:52,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:09:52,391 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-programs/copysome2-2.i[804,817] [2022-01-31 19:09:52,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:09:52,406 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:09:52,417 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-programs/copysome2-2.i[804,817] [2022-01-31 19:09:52,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:09:52,454 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:09:52,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52 WrapperNode [2022-01-31 19:09:52,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:09:52,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:09:52,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:09:52,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:09:52,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:09:52,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:09:52,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:09:52,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:09:52,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (1/1) ... [2022-01-31 19:09:52,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:09:52,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:09:52,522 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 19:09:52,523 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 19:09:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:09:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:09:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:09:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:09:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:09:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:09:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:09:52,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:09:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:09:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:09:52,620 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:09:52,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:09:52,786 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:09:52,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:09:52,791 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 19:09:52,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:09:52 BoogieIcfgContainer [2022-01-31 19:09:52,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:09:52,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:09:52,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:09:52,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:09:52,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:09:52" (1/3) ... [2022-01-31 19:09:52,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dfc3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:09:52, skipping insertion in model container [2022-01-31 19:09:52,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:09:52" (2/3) ... [2022-01-31 19:09:52,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dfc3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:09:52, skipping insertion in model container [2022-01-31 19:09:52,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:09:52" (3/3) ... [2022-01-31 19:09:52,804 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2022-01-31 19:09:52,808 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:09:52,808 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:09:52,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:09:52,891 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 19:09:52,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:09:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:09:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 19:09:52,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:52,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:52,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1171928275, now seen corresponding path program 1 times [2022-01-31 19:09:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:52,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219469480] [2022-01-31 19:09:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:52,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:52,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:53,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219469480] [2022-01-31 19:09:53,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [219469480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:53,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:53,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:09:53,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039414053] [2022-01-31 19:09:53,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:53,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:09:53,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:09:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:09:53,208 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:53,259 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2022-01-31 19:09:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:09:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 19:09:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:53,269 INFO L225 Difference]: With dead ends: 56 [2022-01-31 19:09:53,270 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 19:09:53,272 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 19:09:53,275 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:53,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:09:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 19:09:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 19:09:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 19:09:53,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2022-01-31 19:09:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:53,313 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 19:09:53,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 19:09:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 19:09:53,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:53,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:53,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:09:53,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1745597999, now seen corresponding path program 1 times [2022-01-31 19:09:53,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:53,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546967341] [2022-01-31 19:09:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:53,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:53,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:53,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:53,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546967341] [2022-01-31 19:09:53,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546967341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:53,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:53,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:09:53,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309691148] [2022-01-31 19:09:53,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:53,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:09:53,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:09:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:09:53,416 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:53,510 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-01-31 19:09:53,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:09:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 19:09:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:53,513 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:09:53,513 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 19:09:53,517 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 19:09:53,518 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:53,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 19:09:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-01-31 19:09:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-31 19:09:53,532 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-01-31 19:09:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:53,533 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-31 19:09:53,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-31 19:09:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 19:09:53,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:53,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:53,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:09:53,538 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1397711542, now seen corresponding path program 1 times [2022-01-31 19:09:53,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540562896] [2022-01-31 19:09:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:53,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:53,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:53,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:53,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:53,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:53,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540562896] [2022-01-31 19:09:53,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540562896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:53,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:53,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:09:53,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893660161] [2022-01-31 19:09:53,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:53,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:09:53,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:09:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:09:53,664 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:53,781 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-01-31 19:09:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:09:53,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 19:09:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:53,783 INFO L225 Difference]: With dead ends: 64 [2022-01-31 19:09:53,783 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 19:09:53,784 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 19:09:53,785 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:53,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 19:09:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-01-31 19:09:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-01-31 19:09:53,800 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2022-01-31 19:09:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:53,800 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-01-31 19:09:53,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-01-31 19:09:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 19:09:53,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:53,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:53,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:09:53,802 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:53,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2085873133, now seen corresponding path program 2 times [2022-01-31 19:09:53,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:53,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034978761] [2022-01-31 19:09:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:53,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:53,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:53,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:53,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:53,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034978761] [2022-01-31 19:09:53,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034978761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:53,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:53,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:09:53,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432291711] [2022-01-31 19:09:53,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:53,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:09:53,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:09:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:09:53,932 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:54,059 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2022-01-31 19:09:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:09:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 19:09:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:54,060 INFO L225 Difference]: With dead ends: 78 [2022-01-31 19:09:54,060 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 19:09:54,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:09:54,062 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:54,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 33 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 19:09:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-01-31 19:09:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-01-31 19:09:54,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 33 [2022-01-31 19:09:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:54,076 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-01-31 19:09:54,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-01-31 19:09:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 19:09:54,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:54,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:54,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:09:54,078 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1566069614, now seen corresponding path program 3 times [2022-01-31 19:09:54,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668999120] [2022-01-31 19:09:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:54,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:54,085 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:54,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:54,086 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,194 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 19:09:54,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668999120] [2022-01-31 19:09:54,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668999120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:54,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:54,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 19:09:54,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125136550] [2022-01-31 19:09:54,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:54,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 19:09:54,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 19:09:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 19:09:54,198 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:54,354 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2022-01-31 19:09:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:09:54,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 19:09:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:54,361 INFO L225 Difference]: With dead ends: 92 [2022-01-31 19:09:54,363 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 19:09:54,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:09:54,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:54,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 19:09:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-01-31 19:09:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-01-31 19:09:54,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2022-01-31 19:09:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:54,385 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-01-31 19:09:54,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-01-31 19:09:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 19:09:54,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:54,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:54,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:09:54,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash 874100745, now seen corresponding path program 4 times [2022-01-31 19:09:54,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581227005] [2022-01-31 19:09:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:54,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:54,394 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:54,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:54,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,507 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 19:09:54,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:54,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581227005] [2022-01-31 19:09:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581227005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:54,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:09:54,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136646062] [2022-01-31 19:09:54,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:09:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:09:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:09:54,509 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:54,686 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2022-01-31 19:09:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:09:54,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 19:09:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:54,687 INFO L225 Difference]: With dead ends: 106 [2022-01-31 19:09:54,687 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 19:09:54,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:09:54,688 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:54,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 19:09:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-01-31 19:09:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.25) internal successors, (70), 56 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-01-31 19:09:54,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 49 [2022-01-31 19:09:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:54,698 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-01-31 19:09:54,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-01-31 19:09:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 19:09:54,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:54,698 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:54,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:09:54,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1961860206, now seen corresponding path program 5 times [2022-01-31 19:09:54,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:54,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858705186] [2022-01-31 19:09:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:54,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:54,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:54,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:54,703 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:54,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858705186] [2022-01-31 19:09:54,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858705186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:54,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:54,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 19:09:54,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566161376] [2022-01-31 19:09:54,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:54,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 19:09:54,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 19:09:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 19:09:54,835 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:55,031 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2022-01-31 19:09:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 19:09:55,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 19:09:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:55,034 INFO L225 Difference]: With dead ends: 120 [2022-01-31 19:09:55,034 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 19:09:55,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:09:55,037 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:55,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 19:09:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-01-31 19:09:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-01-31 19:09:55,054 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 57 [2022-01-31 19:09:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:55,054 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-01-31 19:09:55,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-01-31 19:09:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 19:09:55,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:55,057 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:55,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:09:55,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash -992296923, now seen corresponding path program 6 times [2022-01-31 19:09:55,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:55,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796566466] [2022-01-31 19:09:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:55,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:55,062 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:55,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:55,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:55,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:55,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796566466] [2022-01-31 19:09:55,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796566466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:55,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:55,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:09:55,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641501967] [2022-01-31 19:09:55,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:55,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:09:55,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:09:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:09:55,203 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:55,389 INFO L93 Difference]: Finished difference Result 134 states and 170 transitions. [2022-01-31 19:09:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 19:09:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 19:09:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:55,390 INFO L225 Difference]: With dead ends: 134 [2022-01-31 19:09:55,390 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 19:09:55,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:09:55,392 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:55,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 28 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 19:09:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-01-31 19:09:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2022-01-31 19:09:55,403 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 65 [2022-01-31 19:09:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:55,403 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2022-01-31 19:09:55,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2022-01-31 19:09:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 19:09:55,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:55,405 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:55,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:09:55,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1657287242, now seen corresponding path program 7 times [2022-01-31 19:09:55,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:55,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327663118] [2022-01-31 19:09:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:55,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:55,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:55,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:55,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:55,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327663118] [2022-01-31 19:09:55,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [327663118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:55,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:55,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 19:09:55,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866027242] [2022-01-31 19:09:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:55,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 19:09:55,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 19:09:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 19:09:55,516 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:55,741 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2022-01-31 19:09:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:09:55,742 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 19:09:55,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:55,742 INFO L225 Difference]: With dead ends: 148 [2022-01-31 19:09:55,742 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:09:55,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:09:55,743 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 179 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:55,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 38 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:09:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-01-31 19:09:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2022-01-31 19:09:55,758 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 73 [2022-01-31 19:09:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:55,758 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2022-01-31 19:09:55,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2022-01-31 19:09:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 19:09:55,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:55,761 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:55,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:09:55,762 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:55,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1345060417, now seen corresponding path program 8 times [2022-01-31 19:09:55,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:55,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241673716] [2022-01-31 19:09:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:55,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:55,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:55,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:55,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:55,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:55,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241673716] [2022-01-31 19:09:55,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241673716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:55,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:55,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:09:55,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143045309] [2022-01-31 19:09:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:55,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:09:55,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:55,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:09:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:09:55,931 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:56,170 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2022-01-31 19:09:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:09:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 19:09:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:56,171 INFO L225 Difference]: With dead ends: 162 [2022-01-31 19:09:56,171 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 19:09:56,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:09:56,172 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 205 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:56,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 38 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:09:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 19:09:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-01-31 19:09:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.25) internal successors, (110), 88 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-01-31 19:09:56,184 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 81 [2022-01-31 19:09:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:56,184 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-01-31 19:09:56,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-01-31 19:09:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 19:09:56,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:56,185 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:56,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:09:56,185 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:56,186 INFO L85 PathProgramCache]: Analyzing trace with hash -674075098, now seen corresponding path program 9 times [2022-01-31 19:09:56,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:56,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050272370] [2022-01-31 19:09:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:56,188 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:56,188 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:56,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:56,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:56,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:56,319 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050272370] [2022-01-31 19:09:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050272370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:56,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:56,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 19:09:56,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027530142] [2022-01-31 19:09:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:56,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 19:09:56,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 19:09:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:09:56,321 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:56,615 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2022-01-31 19:09:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:09:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 19:09:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:56,616 INFO L225 Difference]: With dead ends: 176 [2022-01-31 19:09:56,616 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 19:09:56,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:09:56,617 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 213 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:56,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 43 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 19:09:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-01-31 19:09:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.25) internal successors, (120), 96 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2022-01-31 19:09:56,629 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 89 [2022-01-31 19:09:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:56,630 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2022-01-31 19:09:56,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2022-01-31 19:09:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 19:09:56,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:56,630 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:56,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:09:56,631 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1940025949, now seen corresponding path program 10 times [2022-01-31 19:09:56,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:56,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944207891] [2022-01-31 19:09:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:56,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:56,634 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:56,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:56,636 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:56,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:56,786 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:56,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944207891] [2022-01-31 19:09:56,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944207891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:56,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:56,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:09:56,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556739348] [2022-01-31 19:09:56,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:56,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:09:56,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:09:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:09:56,788 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:57,086 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2022-01-31 19:09:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:09:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 19:09:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:57,087 INFO L225 Difference]: With dead ends: 190 [2022-01-31 19:09:57,087 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:09:57,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:09:57,088 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 239 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:57,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 43 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:09:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-01-31 19:09:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.25) internal successors, (130), 104 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2022-01-31 19:09:57,101 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 97 [2022-01-31 19:09:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:57,101 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2022-01-31 19:09:57,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2022-01-31 19:09:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 19:09:57,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:57,102 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:57,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:09:57,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash 850350082, now seen corresponding path program 11 times [2022-01-31 19:09:57,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255886001] [2022-01-31 19:09:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:57,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:57,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:57,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:57,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:57,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:57,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:57,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255886001] [2022-01-31 19:09:57,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1255886001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:57,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:57,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:09:57,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241429068] [2022-01-31 19:09:57,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:57,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:09:57,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:09:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:09:57,299 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:57,614 INFO L93 Difference]: Finished difference Result 204 states and 260 transitions. [2022-01-31 19:09:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:09:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 19:09:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:57,615 INFO L225 Difference]: With dead ends: 204 [2022-01-31 19:09:57,615 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 19:09:57,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:09:57,616 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 253 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:57,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 43 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 19:09:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2022-01-31 19:09:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.25) internal successors, (140), 112 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2022-01-31 19:09:57,628 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 105 [2022-01-31 19:09:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:57,628 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2022-01-31 19:09:57,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2022-01-31 19:09:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 19:09:57,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:57,629 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:57,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:09:57,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1462559623, now seen corresponding path program 12 times [2022-01-31 19:09:57,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:57,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266601131] [2022-01-31 19:09:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:57,632 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:57,632 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:57,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:57,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:57,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:57,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266601131] [2022-01-31 19:09:57,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [266601131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:57,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:57,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:09:57,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290053476] [2022-01-31 19:09:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:57,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:09:57,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:09:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:09:57,828 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:58,184 INFO L93 Difference]: Finished difference Result 218 states and 278 transitions. [2022-01-31 19:09:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:09:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 19:09:58,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:58,185 INFO L225 Difference]: With dead ends: 218 [2022-01-31 19:09:58,185 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:09:58,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:09:58,186 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 351 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:58,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 33 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:09:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-01-31 19:09:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.25) internal successors, (150), 120 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2022-01-31 19:09:58,198 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 113 [2022-01-31 19:09:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:58,198 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2022-01-31 19:09:58,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2022-01-31 19:09:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 19:09:58,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:58,199 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:58,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:09:58,200 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash -452995106, now seen corresponding path program 13 times [2022-01-31 19:09:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139422463] [2022-01-31 19:09:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:58,202 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:58,202 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:58,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:58,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:58,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:58,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139422463] [2022-01-31 19:09:58,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1139422463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:58,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:58,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 19:09:58,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026163419] [2022-01-31 19:09:58,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:58,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 19:09:58,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 19:09:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 19:09:58,396 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:58,775 INFO L93 Difference]: Finished difference Result 232 states and 296 transitions. [2022-01-31 19:09:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:09:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 19:09:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:58,778 INFO L225 Difference]: With dead ends: 232 [2022-01-31 19:09:58,778 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:09:58,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:09:58,781 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 359 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:58,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 33 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:09:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-01-31 19:09:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.25) internal successors, (160), 128 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2022-01-31 19:09:58,798 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 121 [2022-01-31 19:09:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2022-01-31 19:09:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2022-01-31 19:09:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 19:09:58,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:58,799 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:58,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:09:58,800 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1521288043, now seen corresponding path program 14 times [2022-01-31 19:09:58,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602290048] [2022-01-31 19:09:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:58,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:58,805 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:58,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:58,808 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:09:59,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602290048] [2022-01-31 19:09:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [602290048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:59,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:59,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:09:59,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329299045] [2022-01-31 19:09:59,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:09:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:09:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:09:59,052 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:09:59,451 INFO L93 Difference]: Finished difference Result 246 states and 314 transitions. [2022-01-31 19:09:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:09:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 19:09:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:09:59,452 INFO L225 Difference]: With dead ends: 246 [2022-01-31 19:09:59,452 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 19:09:59,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:09:59,454 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 349 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:09:59,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 43 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:09:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 19:09:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-01-31 19:09:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.25) internal successors, (170), 136 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:09:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 175 transitions. [2022-01-31 19:09:59,474 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 175 transitions. Word has length 129 [2022-01-31 19:09:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:09:59,475 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 175 transitions. [2022-01-31 19:09:59,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:09:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 175 transitions. [2022-01-31 19:09:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 19:09:59,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:09:59,476 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:09:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:09:59,477 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:09:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:09:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1822095942, now seen corresponding path program 15 times [2022-01-31 19:09:59,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:09:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463322390] [2022-01-31 19:09:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:09:59,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:09:59,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:09:59,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:09:59,484 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:09:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:09:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:09:59,719 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 19:09:59,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:09:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463322390] [2022-01-31 19:09:59,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463322390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:09:59,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:09:59,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:09:59,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558379699] [2022-01-31 19:09:59,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:09:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:09:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:09:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:09:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:09:59,720 INFO L87 Difference]: Start difference. First operand 142 states and 175 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:00,167 INFO L93 Difference]: Finished difference Result 260 states and 332 transitions. [2022-01-31 19:10:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:10:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 19:10:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:00,168 INFO L225 Difference]: With dead ends: 260 [2022-01-31 19:10:00,168 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 19:10:00,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:10:00,169 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 339 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:00,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 43 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:10:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 19:10:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2022-01-31 19:10:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.25) internal successors, (180), 144 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2022-01-31 19:10:00,189 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 137 [2022-01-31 19:10:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:00,189 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2022-01-31 19:10:00,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2022-01-31 19:10:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 19:10:00,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:00,190 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:00,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:10:00,190 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1162407247, now seen corresponding path program 16 times [2022-01-31 19:10:00,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:00,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176670204] [2022-01-31 19:10:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:00,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:00,193 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:00,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:00,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:00,487 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176670204] [2022-01-31 19:10:00,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176670204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:00,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:00,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:10:00,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222178059] [2022-01-31 19:10:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:10:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:10:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:10:00,488 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:00,966 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2022-01-31 19:10:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:10:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 19:10:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:00,968 INFO L225 Difference]: With dead ends: 274 [2022-01-31 19:10:00,968 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:10:00,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:10:00,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 461 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:00,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 38 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:10:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2022-01-31 19:10:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.25) internal successors, (190), 152 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2022-01-31 19:10:00,992 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 145 [2022-01-31 19:10:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:00,993 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2022-01-31 19:10:00,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2022-01-31 19:10:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 19:10:00,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:00,994 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:00,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:10:00,994 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 897571222, now seen corresponding path program 17 times [2022-01-31 19:10:00,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336293450] [2022-01-31 19:10:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:00,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:00,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:00,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:01,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:01,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:01,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336293450] [2022-01-31 19:10:01,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336293450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:01,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:01,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:10:01,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861032217] [2022-01-31 19:10:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:01,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:10:01,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:10:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:10:01,307 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:01,821 INFO L93 Difference]: Finished difference Result 288 states and 368 transitions. [2022-01-31 19:10:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:10:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 19:10:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:01,825 INFO L225 Difference]: With dead ends: 288 [2022-01-31 19:10:01,825 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:10:01,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:10:01,827 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 421 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:01,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 43 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:10:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2022-01-31 19:10:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.25) internal successors, (200), 160 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2022-01-31 19:10:01,851 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 153 [2022-01-31 19:10:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2022-01-31 19:10:01,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2022-01-31 19:10:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 19:10:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:01,853 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:01,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:10:01,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash 915693261, now seen corresponding path program 18 times [2022-01-31 19:10:01,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:01,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810484260] [2022-01-31 19:10:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:01,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:01,856 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:01,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:01,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:02,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:02,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:02,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810484260] [2022-01-31 19:10:02,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810484260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:02,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:02,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:10:02,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174013243] [2022-01-31 19:10:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:02,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:10:02,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:10:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:10:02,166 INFO L87 Difference]: Start difference. First operand 166 states and 205 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:02,728 INFO L93 Difference]: Finished difference Result 302 states and 386 transitions. [2022-01-31 19:10:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:10:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 19:10:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:02,729 INFO L225 Difference]: With dead ends: 302 [2022-01-31 19:10:02,730 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 19:10:02,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:10:02,731 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 495 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:02,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 33 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 19:10:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2022-01-31 19:10:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.25) internal successors, (210), 168 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-01-31 19:10:02,760 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 161 [2022-01-31 19:10:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:02,761 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-01-31 19:10:02,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-01-31 19:10:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 19:10:02,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:02,762 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:02,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:10:02,762 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 905007986, now seen corresponding path program 19 times [2022-01-31 19:10:02,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:02,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95200467] [2022-01-31 19:10:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:02,765 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:02,765 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:02,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:02,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:03,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95200467] [2022-01-31 19:10:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [95200467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:03,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:03,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:10:03,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447278380] [2022-01-31 19:10:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:03,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:10:03,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:10:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:10:03,090 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:03,679 INFO L93 Difference]: Finished difference Result 316 states and 404 transitions. [2022-01-31 19:10:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:10:03,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 19:10:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:03,680 INFO L225 Difference]: With dead ends: 316 [2022-01-31 19:10:03,680 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:10:03,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:10:03,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 617 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:03,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 33 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:10:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2022-01-31 19:10:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.25) internal successors, (220), 176 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 225 transitions. [2022-01-31 19:10:03,708 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 225 transitions. Word has length 169 [2022-01-31 19:10:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:03,708 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 225 transitions. [2022-01-31 19:10:03,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 225 transitions. [2022-01-31 19:10:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 19:10:03,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:03,710 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:10:03,710 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1031806743, now seen corresponding path program 20 times [2022-01-31 19:10:03,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:03,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781986208] [2022-01-31 19:10:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:03,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:03,713 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:03,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:03,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:04,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781986208] [2022-01-31 19:10:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781986208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:04,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:04,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:10:04,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918262687] [2022-01-31 19:10:04,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:04,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:10:04,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:10:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:10:04,038 INFO L87 Difference]: Start difference. First operand 182 states and 225 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:04,642 INFO L93 Difference]: Finished difference Result 330 states and 422 transitions. [2022-01-31 19:10:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:10:04,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 19:10:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:04,644 INFO L225 Difference]: With dead ends: 330 [2022-01-31 19:10:04,644 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 19:10:04,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:10:04,646 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 589 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:04,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 38 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 19:10:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2022-01-31 19:10:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.25) internal successors, (230), 184 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 235 transitions. [2022-01-31 19:10:04,668 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 235 transitions. Word has length 177 [2022-01-31 19:10:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:04,668 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 235 transitions. [2022-01-31 19:10:04,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 235 transitions. [2022-01-31 19:10:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 19:10:04,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:04,670 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:04,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:10:04,670 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1839566002, now seen corresponding path program 21 times [2022-01-31 19:10:04,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:04,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830118719] [2022-01-31 19:10:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:04,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:04,673 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:04,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:04,677 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:05,056 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:05,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830118719] [2022-01-31 19:10:05,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830118719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:05,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:05,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:10:05,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074349415] [2022-01-31 19:10:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:05,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:10:05,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:05,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:10:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:10:05,058 INFO L87 Difference]: Start difference. First operand 190 states and 235 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:05,681 INFO L93 Difference]: Finished difference Result 344 states and 440 transitions. [2022-01-31 19:10:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:10:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 19:10:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:05,682 INFO L225 Difference]: With dead ends: 344 [2022-01-31 19:10:05,682 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 19:10:05,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:10:05,684 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 555 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:05,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 38 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 19:10:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-01-31 19:10:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.25) internal successors, (240), 192 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2022-01-31 19:10:05,714 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 185 [2022-01-31 19:10:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:05,714 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2022-01-31 19:10:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2022-01-31 19:10:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 19:10:05,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:05,716 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:05,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:10:05,716 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:05,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1005676283, now seen corresponding path program 22 times [2022-01-31 19:10:05,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:05,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360502026] [2022-01-31 19:10:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:05,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:05,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:05,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:05,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:06,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:06,076 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:06,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360502026] [2022-01-31 19:10:06,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [360502026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:06,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:06,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:10:06,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829215661] [2022-01-31 19:10:06,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:10:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:06,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:10:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:10:06,077 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:06,770 INFO L93 Difference]: Finished difference Result 358 states and 458 transitions. [2022-01-31 19:10:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:10:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 19:10:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:06,772 INFO L225 Difference]: With dead ends: 358 [2022-01-31 19:10:06,772 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:10:06,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:10:06,773 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 557 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:06,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 48 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:10:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2022-01-31 19:10:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.25) internal successors, (250), 200 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 255 transitions. [2022-01-31 19:10:06,803 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 255 transitions. Word has length 193 [2022-01-31 19:10:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:06,803 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 255 transitions. [2022-01-31 19:10:06,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 255 transitions. [2022-01-31 19:10:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 19:10:06,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:06,805 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:06,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:10:06,805 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:06,806 INFO L85 PathProgramCache]: Analyzing trace with hash -77842134, now seen corresponding path program 23 times [2022-01-31 19:10:06,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:06,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914106986] [2022-01-31 19:10:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:06,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:06,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:06,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:06,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:07,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:07,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:07,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914106986] [2022-01-31 19:10:07,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914106986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:07,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:07,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:10:07,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504770628] [2022-01-31 19:10:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:07,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:10:07,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:10:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:10:07,183 INFO L87 Difference]: Start difference. First operand 206 states and 255 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:07,822 INFO L93 Difference]: Finished difference Result 372 states and 476 transitions. [2022-01-31 19:10:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:10:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 19:10:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:07,823 INFO L225 Difference]: With dead ends: 372 [2022-01-31 19:10:07,823 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 19:10:07,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:10:07,825 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 607 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:07,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 43 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 19:10:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 214. [2022-01-31 19:10:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2022-01-31 19:10:07,876 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 201 [2022-01-31 19:10:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:07,876 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2022-01-31 19:10:07,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2022-01-31 19:10:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 19:10:07,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:07,878 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:07,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:10:07,878 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1126856927, now seen corresponding path program 24 times [2022-01-31 19:10:07,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:07,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031030610] [2022-01-31 19:10:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:07,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:07,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:07,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:07,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:08,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:08,305 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031030610] [2022-01-31 19:10:08,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031030610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:08,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:08,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:10:08,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214302128] [2022-01-31 19:10:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:08,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:10:08,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:10:08,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:10:08,309 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:09,027 INFO L93 Difference]: Finished difference Result 386 states and 494 transitions. [2022-01-31 19:10:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:10:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 19:10:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:09,028 INFO L225 Difference]: With dead ends: 386 [2022-01-31 19:10:09,028 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:10:09,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:10:09,030 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 615 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:09,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 43 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:10:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 222. [2022-01-31 19:10:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.25) internal successors, (270), 216 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 275 transitions. [2022-01-31 19:10:09,060 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 275 transitions. Word has length 209 [2022-01-31 19:10:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 275 transitions. [2022-01-31 19:10:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 275 transitions. [2022-01-31 19:10:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 19:10:09,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:09,061 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:09,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:10:09,062 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -191388410, now seen corresponding path program 25 times [2022-01-31 19:10:09,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:09,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430985420] [2022-01-31 19:10:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:09,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:09,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:09,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:09,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:09,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430985420] [2022-01-31 19:10:09,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1430985420] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:09,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:09,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:10:09,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823514012] [2022-01-31 19:10:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:09,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:10:09,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:10:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:10:09,496 INFO L87 Difference]: Start difference. First operand 222 states and 275 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:10,179 INFO L93 Difference]: Finished difference Result 400 states and 512 transitions. [2022-01-31 19:10:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:10:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 19:10:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:10,181 INFO L225 Difference]: With dead ends: 400 [2022-01-31 19:10:10,181 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 19:10:10,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:10:10,183 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 893 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:10,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 33 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 19:10:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2022-01-31 19:10:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.25) internal successors, (280), 224 states have internal predecessors, (280), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 285 transitions. [2022-01-31 19:10:10,217 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 285 transitions. Word has length 217 [2022-01-31 19:10:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:10,217 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 285 transitions. [2022-01-31 19:10:10,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 285 transitions. [2022-01-31 19:10:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 19:10:10,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:10,218 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:10,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:10:10,218 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1435915459, now seen corresponding path program 26 times [2022-01-31 19:10:10,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083574803] [2022-01-31 19:10:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:10,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:10,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:10,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:10,227 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:10,711 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 19:10:10,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083574803] [2022-01-31 19:10:10,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2083574803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:10,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:10:10,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436926002] [2022-01-31 19:10:10,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:10,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:10:10,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:10:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:10:10,713 INFO L87 Difference]: Start difference. First operand 230 states and 285 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:11,446 INFO L93 Difference]: Finished difference Result 414 states and 530 transitions. [2022-01-31 19:10:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:10:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 19:10:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:11,448 INFO L225 Difference]: With dead ends: 414 [2022-01-31 19:10:11,448 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 19:10:11,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:10:11,450 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 745 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:11,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 38 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:10:11,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 19:10:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 238. [2022-01-31 19:10:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.25) internal successors, (290), 232 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 295 transitions. [2022-01-31 19:10:11,490 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 295 transitions. Word has length 225 [2022-01-31 19:10:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:11,490 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 295 transitions. [2022-01-31 19:10:11,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 295 transitions. [2022-01-31 19:10:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 19:10:11,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:11,492 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:11,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:10:11,492 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -189942046, now seen corresponding path program 27 times [2022-01-31 19:10:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:11,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517194026] [2022-01-31 19:10:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:11,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:11,495 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:11,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:11,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:11,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:11,955 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:11,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517194026] [2022-01-31 19:10:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517194026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:11,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:11,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:10:11,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415230660] [2022-01-31 19:10:11,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:11,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:10:11,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:10:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:10:11,957 INFO L87 Difference]: Start difference. First operand 238 states and 295 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:12,813 INFO L93 Difference]: Finished difference Result 428 states and 548 transitions. [2022-01-31 19:10:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:10:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 19:10:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:12,814 INFO L225 Difference]: With dead ends: 428 [2022-01-31 19:10:12,814 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 19:10:12,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:10:12,816 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 615 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:12,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 58 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 19:10:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2022-01-31 19:10:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.25) internal successors, (300), 240 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2022-01-31 19:10:12,859 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 233 [2022-01-31 19:10:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:12,860 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2022-01-31 19:10:12,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2022-01-31 19:10:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 19:10:12,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:12,861 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:12,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:10:12,861 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1717568857, now seen corresponding path program 28 times [2022-01-31 19:10:12,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030549536] [2022-01-31 19:10:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:12,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:12,864 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:12,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:12,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:13,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:13,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030549536] [2022-01-31 19:10:13,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2030549536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:13,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:13,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:10:13,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676118088] [2022-01-31 19:10:13,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:13,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:10:13,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:10:13,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:10:13,372 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:14,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:14,209 INFO L93 Difference]: Finished difference Result 442 states and 566 transitions. [2022-01-31 19:10:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:10:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 19:10:14,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:14,211 INFO L225 Difference]: With dead ends: 442 [2022-01-31 19:10:14,211 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 19:10:14,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:10:14,213 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 713 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:14,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 53 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:14,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 19:10:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 254. [2022-01-31 19:10:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.25) internal successors, (310), 248 states have internal predecessors, (310), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 315 transitions. [2022-01-31 19:10:14,258 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 315 transitions. Word has length 241 [2022-01-31 19:10:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:14,259 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 315 transitions. [2022-01-31 19:10:14,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 315 transitions. [2022-01-31 19:10:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 19:10:14,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:14,260 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:14,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:10:14,260 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2059440450, now seen corresponding path program 29 times [2022-01-31 19:10:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:14,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35475555] [2022-01-31 19:10:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:14,263 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:14,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:14,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:14,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:14,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:14,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35475555] [2022-01-31 19:10:14,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [35475555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:14,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:14,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:10:14,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915194799] [2022-01-31 19:10:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:14,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:10:14,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:10:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:10:14,824 INFO L87 Difference]: Start difference. First operand 254 states and 315 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:15,723 INFO L93 Difference]: Finished difference Result 456 states and 584 transitions. [2022-01-31 19:10:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:10:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 19:10:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:15,725 INFO L225 Difference]: With dead ends: 456 [2022-01-31 19:10:15,725 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 19:10:15,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:10:15,727 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 889 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:15,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 38 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 19:10:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 262. [2022-01-31 19:10:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.25) internal successors, (320), 256 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 325 transitions. [2022-01-31 19:10:15,772 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 325 transitions. Word has length 249 [2022-01-31 19:10:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:15,772 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 325 transitions. [2022-01-31 19:10:15,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 325 transitions. [2022-01-31 19:10:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 19:10:15,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:15,774 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:15,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:10:15,774 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:15,774 INFO L85 PathProgramCache]: Analyzing trace with hash 105747829, now seen corresponding path program 30 times [2022-01-31 19:10:15,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:15,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923677225] [2022-01-31 19:10:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:15,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:15,777 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:15,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:15,782 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:16,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:16,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923677225] [2022-01-31 19:10:16,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923677225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:16,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:16,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:10:16,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617090569] [2022-01-31 19:10:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:16,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:10:16,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:10:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:10:16,346 INFO L87 Difference]: Start difference. First operand 262 states and 325 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:17,268 INFO L93 Difference]: Finished difference Result 470 states and 602 transitions. [2022-01-31 19:10:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:10:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 19:10:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:17,269 INFO L225 Difference]: With dead ends: 470 [2022-01-31 19:10:17,269 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 19:10:17,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:10:17,271 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:17,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 38 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 19:10:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 270. [2022-01-31 19:10:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.25) internal successors, (330), 264 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 335 transitions. [2022-01-31 19:10:17,318 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 335 transitions. Word has length 257 [2022-01-31 19:10:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:17,318 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 335 transitions. [2022-01-31 19:10:17,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 335 transitions. [2022-01-31 19:10:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 19:10:17,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:17,319 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:17,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:10:17,320 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1659751578, now seen corresponding path program 31 times [2022-01-31 19:10:17,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:17,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672922592] [2022-01-31 19:10:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:17,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:17,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:17,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:17,329 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:17,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672922592] [2022-01-31 19:10:17,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672922592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:17,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:17,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:10:17,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902188249] [2022-01-31 19:10:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:17,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:10:17,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:10:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:10:17,926 INFO L87 Difference]: Start difference. First operand 270 states and 335 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:18,864 INFO L93 Difference]: Finished difference Result 484 states and 620 transitions. [2022-01-31 19:10:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:10:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 19:10:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:18,865 INFO L225 Difference]: With dead ends: 484 [2022-01-31 19:10:18,866 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 19:10:18,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:10:18,867 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 875 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:18,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 43 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 19:10:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2022-01-31 19:10:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.25) internal successors, (340), 272 states have internal predecessors, (340), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 345 transitions. [2022-01-31 19:10:18,921 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 345 transitions. Word has length 265 [2022-01-31 19:10:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 345 transitions. [2022-01-31 19:10:18,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 345 transitions. [2022-01-31 19:10:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 19:10:18,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:18,924 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:18,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:10:18,924 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1002920849, now seen corresponding path program 32 times [2022-01-31 19:10:18,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:18,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244386044] [2022-01-31 19:10:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:18,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:18,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:18,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:18,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:19,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:19,567 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:19,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244386044] [2022-01-31 19:10:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244386044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:19,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:19,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:10:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532440567] [2022-01-31 19:10:19,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:19,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:10:19,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:10:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:10:19,569 INFO L87 Difference]: Start difference. First operand 278 states and 345 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:20,616 INFO L93 Difference]: Finished difference Result 498 states and 638 transitions. [2022-01-31 19:10:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:10:20,616 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 19:10:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:20,617 INFO L225 Difference]: With dead ends: 498 [2022-01-31 19:10:20,617 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 19:10:20,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:10:20,619 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 823 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:20,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 48 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 19:10:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 286. [2022-01-31 19:10:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.25) internal successors, (350), 280 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 355 transitions. [2022-01-31 19:10:20,683 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 355 transitions. Word has length 273 [2022-01-31 19:10:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:20,684 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 355 transitions. [2022-01-31 19:10:20,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 355 transitions. [2022-01-31 19:10:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 19:10:20,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:20,685 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:20,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:10:20,685 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:20,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1655058314, now seen corresponding path program 33 times [2022-01-31 19:10:20,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:20,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280500038] [2022-01-31 19:10:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:20,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:20,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:20,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:20,699 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:21,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280500038] [2022-01-31 19:10:21,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280500038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:21,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:21,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:10:21,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126283693] [2022-01-31 19:10:21,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:21,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:10:21,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:10:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:10:21,286 INFO L87 Difference]: Start difference. First operand 286 states and 355 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:22,270 INFO L93 Difference]: Finished difference Result 512 states and 656 transitions. [2022-01-31 19:10:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:10:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 19:10:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:22,272 INFO L225 Difference]: With dead ends: 512 [2022-01-31 19:10:22,272 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 19:10:22,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:10:22,273 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1035 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:22,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 38 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 19:10:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2022-01-31 19:10:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.25) internal successors, (360), 288 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 365 transitions. [2022-01-31 19:10:22,322 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 365 transitions. Word has length 281 [2022-01-31 19:10:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:22,322 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 365 transitions. [2022-01-31 19:10:22,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 365 transitions. [2022-01-31 19:10:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 19:10:22,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:22,324 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:22,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:10:22,324 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1268623443, now seen corresponding path program 34 times [2022-01-31 19:10:22,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:22,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776137157] [2022-01-31 19:10:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:22,327 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:22,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:22,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:22,335 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:22,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:22,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776137157] [2022-01-31 19:10:22,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [776137157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:22,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:22,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:10:22,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706854752] [2022-01-31 19:10:22,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:22,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:10:22,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:10:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:10:22,959 INFO L87 Difference]: Start difference. First operand 294 states and 365 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:23,971 INFO L93 Difference]: Finished difference Result 526 states and 674 transitions. [2022-01-31 19:10:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:10:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 19:10:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:23,973 INFO L225 Difference]: With dead ends: 526 [2022-01-31 19:10:23,973 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 19:10:23,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:10:23,974 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 911 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:23,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 43 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 19:10:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2022-01-31 19:10:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 296 states have (on average 1.25) internal successors, (370), 296 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 375 transitions. [2022-01-31 19:10:24,039 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 375 transitions. Word has length 289 [2022-01-31 19:10:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:24,039 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 375 transitions. [2022-01-31 19:10:24,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 375 transitions. [2022-01-31 19:10:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 19:10:24,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:24,041 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:24,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:10:24,041 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1222346158, now seen corresponding path program 35 times [2022-01-31 19:10:24,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:24,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456003965] [2022-01-31 19:10:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:24,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:24,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:24,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:24,052 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:24,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:24,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456003965] [2022-01-31 19:10:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456003965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:24,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:24,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:10:24,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139406427] [2022-01-31 19:10:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:10:24,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:10:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:10:24,783 INFO L87 Difference]: Start difference. First operand 302 states and 375 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:25,821 INFO L93 Difference]: Finished difference Result 540 states and 692 transitions. [2022-01-31 19:10:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:10:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 19:10:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:25,823 INFO L225 Difference]: With dead ends: 540 [2022-01-31 19:10:25,823 INFO L226 Difference]: Without dead ends: 315 [2022-01-31 19:10:25,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:10:25,824 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 931 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:25,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 43 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-01-31 19:10:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 310. [2022-01-31 19:10:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.25) internal successors, (380), 304 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 385 transitions. [2022-01-31 19:10:25,878 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 385 transitions. Word has length 297 [2022-01-31 19:10:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:25,878 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 385 transitions. [2022-01-31 19:10:25,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 385 transitions. [2022-01-31 19:10:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 19:10:25,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:25,880 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:25,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:10:25,880 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2041809353, now seen corresponding path program 36 times [2022-01-31 19:10:25,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781684018] [2022-01-31 19:10:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:25,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:25,883 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:25,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:25,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:26,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:26,619 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:26,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781684018] [2022-01-31 19:10:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781684018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:26,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:26,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:10:26,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458789044] [2022-01-31 19:10:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:26,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:10:26,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:10:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:10:26,621 INFO L87 Difference]: Start difference. First operand 310 states and 385 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:27,744 INFO L93 Difference]: Finished difference Result 554 states and 710 transitions. [2022-01-31 19:10:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:10:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 19:10:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:27,746 INFO L225 Difference]: With dead ends: 554 [2022-01-31 19:10:27,746 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 19:10:27,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:10:27,747 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:27,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1180 Valid, 28 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 19:10:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 318. [2022-01-31 19:10:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 312 states have (on average 1.25) internal successors, (390), 312 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 395 transitions. [2022-01-31 19:10:27,804 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 395 transitions. Word has length 305 [2022-01-31 19:10:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:27,804 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 395 transitions. [2022-01-31 19:10:27,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 395 transitions. [2022-01-31 19:10:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 19:10:27,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:27,806 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:10:27,806 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash -974206418, now seen corresponding path program 37 times [2022-01-31 19:10:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110624592] [2022-01-31 19:10:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:27,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:27,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:27,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:27,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:28,569 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:28,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110624592] [2022-01-31 19:10:28,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110624592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:28,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:28,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 19:10:28,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396978509] [2022-01-31 19:10:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:28,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 19:10:28,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 19:10:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:10:28,570 INFO L87 Difference]: Start difference. First operand 318 states and 395 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:29,724 INFO L93 Difference]: Finished difference Result 568 states and 728 transitions. [2022-01-31 19:10:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:10:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 19:10:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:29,727 INFO L225 Difference]: With dead ends: 568 [2022-01-31 19:10:29,727 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 19:10:29,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:10:29,736 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1031 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:29,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 43 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 19:10:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 326. [2022-01-31 19:10:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 320 states have (on average 1.25) internal successors, (400), 320 states have internal predecessors, (400), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 405 transitions. [2022-01-31 19:10:29,813 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 405 transitions. Word has length 313 [2022-01-31 19:10:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:29,813 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 405 transitions. [2022-01-31 19:10:29,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 405 transitions. [2022-01-31 19:10:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 19:10:29,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:29,815 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:29,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:10:29,815 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:29,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1364193765, now seen corresponding path program 38 times [2022-01-31 19:10:29,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:29,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688332876] [2022-01-31 19:10:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:29,819 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:29,819 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:29,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:29,827 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:30,572 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 19:10:30,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:30,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688332876] [2022-01-31 19:10:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688332876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:30,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:10:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303865006] [2022-01-31 19:10:30,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:10:30,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:10:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:10:30,574 INFO L87 Difference]: Start difference. First operand 326 states and 405 transitions. Second operand has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 41 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:31,801 INFO L93 Difference]: Finished difference Result 582 states and 746 transitions. [2022-01-31 19:10:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:10:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 41 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 19:10:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:31,802 INFO L225 Difference]: With dead ends: 582 [2022-01-31 19:10:31,802 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 19:10:31,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:10:31,804 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1261 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:31,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1262 Valid, 38 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 19:10:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 334. [2022-01-31 19:10:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.25) internal successors, (410), 328 states have internal predecessors, (410), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 415 transitions. [2022-01-31 19:10:31,868 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 415 transitions. Word has length 321 [2022-01-31 19:10:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:31,868 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 415 transitions. [2022-01-31 19:10:31,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.261904761904762) internal successors, (95), 41 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 415 transitions. [2022-01-31 19:10:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 19:10:31,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:31,870 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:31,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:10:31,870 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1839611894, now seen corresponding path program 39 times [2022-01-31 19:10:31,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:31,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826199344] [2022-01-31 19:10:31,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:31,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:31,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:31,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:31,882 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:32,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:32,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:32,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826199344] [2022-01-31 19:10:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826199344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:32,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:32,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 19:10:32,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422336648] [2022-01-31 19:10:32,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:32,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 19:10:32,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 19:10:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:10:32,674 INFO L87 Difference]: Start difference. First operand 334 states and 415 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:33,946 INFO L93 Difference]: Finished difference Result 596 states and 764 transitions. [2022-01-31 19:10:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:10:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-01-31 19:10:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:33,947 INFO L225 Difference]: With dead ends: 596 [2022-01-31 19:10:33,947 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 19:10:33,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:10:33,948 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1125 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:33,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 38 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:10:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 19:10:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 342. [2022-01-31 19:10:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.25) internal successors, (420), 336 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 425 transitions. [2022-01-31 19:10:34,030 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 425 transitions. Word has length 329 [2022-01-31 19:10:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:34,030 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 425 transitions. [2022-01-31 19:10:34,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 425 transitions. [2022-01-31 19:10:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 19:10:34,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:34,032 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:34,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:10:34,032 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash 483168257, now seen corresponding path program 40 times [2022-01-31 19:10:34,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734756269] [2022-01-31 19:10:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:34,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:34,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:34,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:34,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:34,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:34,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734756269] [2022-01-31 19:10:34,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734756269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:34,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:34,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:10:34,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661873138] [2022-01-31 19:10:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:34,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:10:34,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:10:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:10:34,820 INFO L87 Difference]: Start difference. First operand 342 states and 425 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:36,163 INFO L93 Difference]: Finished difference Result 610 states and 782 transitions. [2022-01-31 19:10:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:10:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 337 [2022-01-31 19:10:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:36,164 INFO L225 Difference]: With dead ends: 610 [2022-01-31 19:10:36,164 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 19:10:36,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:10:36,166 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 983 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:36,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 53 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 19:10:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 350. [2022-01-31 19:10:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 344 states have (on average 1.25) internal successors, (430), 344 states have internal predecessors, (430), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 435 transitions. [2022-01-31 19:10:36,229 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 435 transitions. Word has length 337 [2022-01-31 19:10:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:36,229 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 435 transitions. [2022-01-31 19:10:36,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 435 transitions. [2022-01-31 19:10:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 19:10:36,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:36,231 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:36,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:10:36,231 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1207542810, now seen corresponding path program 41 times [2022-01-31 19:10:36,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989544854] [2022-01-31 19:10:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:36,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:36,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:36,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:36,245 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:37,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:37,073 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989544854] [2022-01-31 19:10:37,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989544854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:37,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:37,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 19:10:37,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122212151] [2022-01-31 19:10:37,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 19:10:37,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 19:10:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:10:37,075 INFO L87 Difference]: Start difference. First operand 350 states and 435 transitions. Second operand has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:38,420 INFO L93 Difference]: Finished difference Result 624 states and 800 transitions. [2022-01-31 19:10:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:10:38,420 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 19:10:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:38,421 INFO L225 Difference]: With dead ends: 624 [2022-01-31 19:10:38,421 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 19:10:38,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:10:38,423 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 895 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:38,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 68 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 19:10:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 358. [2022-01-31 19:10:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.25) internal successors, (440), 352 states have internal predecessors, (440), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 445 transitions. [2022-01-31 19:10:38,499 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 445 transitions. Word has length 345 [2022-01-31 19:10:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:38,499 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 445 transitions. [2022-01-31 19:10:38,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2444444444444445) internal successors, (101), 44 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 445 transitions. [2022-01-31 19:10:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 19:10:38,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:38,501 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:38,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:10:38,501 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 968778781, now seen corresponding path program 42 times [2022-01-31 19:10:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:38,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100359654] [2022-01-31 19:10:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:38,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:38,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:38,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:38,515 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:39,444 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:39,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100359654] [2022-01-31 19:10:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100359654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:39,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:39,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:10:39,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539595785] [2022-01-31 19:10:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:39,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:10:39,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:10:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:10:39,445 INFO L87 Difference]: Start difference. First operand 358 states and 445 transitions. Second operand has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 45 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:40,935 INFO L93 Difference]: Finished difference Result 638 states and 818 transitions. [2022-01-31 19:10:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:10:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 45 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-01-31 19:10:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:40,936 INFO L225 Difference]: With dead ends: 638 [2022-01-31 19:10:40,936 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 19:10:40,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:10:40,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:40,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 33 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 19:10:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 366. [2022-01-31 19:10:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.25) internal successors, (450), 360 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 455 transitions. [2022-01-31 19:10:41,016 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 455 transitions. Word has length 353 [2022-01-31 19:10:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:41,016 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 455 transitions. [2022-01-31 19:10:41,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.239130434782609) internal successors, (103), 45 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 455 transitions. [2022-01-31 19:10:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 19:10:41,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:41,018 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:41,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:10:41,019 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash -980050494, now seen corresponding path program 43 times [2022-01-31 19:10:41,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:41,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828740933] [2022-01-31 19:10:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:41,022 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:41,022 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:41,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:41,032 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:41,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828740933] [2022-01-31 19:10:41,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [828740933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:41,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:41,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:10:41,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157597558] [2022-01-31 19:10:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:41,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:10:41,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:41,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:10:41,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:10:41,912 INFO L87 Difference]: Start difference. First operand 366 states and 455 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:43,351 INFO L93 Difference]: Finished difference Result 652 states and 836 transitions. [2022-01-31 19:10:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:10:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 19:10:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:43,352 INFO L225 Difference]: With dead ends: 652 [2022-01-31 19:10:43,352 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 19:10:43,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:10:43,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1211 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:43,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 53 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 19:10:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 374. [2022-01-31 19:10:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 368 states have (on average 1.25) internal successors, (460), 368 states have internal predecessors, (460), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 465 transitions. [2022-01-31 19:10:43,455 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 465 transitions. Word has length 361 [2022-01-31 19:10:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:43,455 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 465 transitions. [2022-01-31 19:10:43,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 465 transitions. [2022-01-31 19:10:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 19:10:43,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:43,457 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:43,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:10:43,458 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash -507875783, now seen corresponding path program 44 times [2022-01-31 19:10:43,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:43,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907915611] [2022-01-31 19:10:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:43,461 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:43,461 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:43,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:43,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:44,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907915611] [2022-01-31 19:10:44,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [907915611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:44,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:44,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:10:44,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504792070] [2022-01-31 19:10:44,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:44,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:10:44,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:10:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:10:44,440 INFO L87 Difference]: Start difference. First operand 374 states and 465 transitions. Second operand has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:45,981 INFO L93 Difference]: Finished difference Result 666 states and 854 transitions. [2022-01-31 19:10:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:10:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 19:10:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:45,982 INFO L225 Difference]: With dead ends: 666 [2022-01-31 19:10:45,982 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 19:10:45,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:10:45,983 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1099 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:45,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 58 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 19:10:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 382. [2022-01-31 19:10:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.25) internal successors, (470), 376 states have internal predecessors, (470), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 475 transitions. [2022-01-31 19:10:46,081 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 475 transitions. Word has length 369 [2022-01-31 19:10:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 475 transitions. [2022-01-31 19:10:46,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2291666666666665) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 475 transitions. [2022-01-31 19:10:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 19:10:46,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:46,084 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:46,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:10:46,084 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1554548126, now seen corresponding path program 45 times [2022-01-31 19:10:46,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:46,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647396651] [2022-01-31 19:10:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:46,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:46,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:46,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:46,100 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:47,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647396651] [2022-01-31 19:10:47,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [647396651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:47,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:47,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:10:47,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992591755] [2022-01-31 19:10:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:47,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:10:47,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:10:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:10:47,200 INFO L87 Difference]: Start difference. First operand 382 states and 475 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:48,812 INFO L93 Difference]: Finished difference Result 680 states and 872 transitions. [2022-01-31 19:10:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:10:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-01-31 19:10:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:48,814 INFO L225 Difference]: With dead ends: 680 [2022-01-31 19:10:48,814 INFO L226 Difference]: Without dead ends: 395 [2022-01-31 19:10:48,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:10:48,815 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1125 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:48,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 63 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-31 19:10:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 390. [2022-01-31 19:10:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 384 states have (on average 1.25) internal successors, (480), 384 states have internal predecessors, (480), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 485 transitions. [2022-01-31 19:10:48,890 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 485 transitions. Word has length 377 [2022-01-31 19:10:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:48,890 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 485 transitions. [2022-01-31 19:10:48,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 485 transitions. [2022-01-31 19:10:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-01-31 19:10:48,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:48,893 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:48,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:10:48,893 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1974096299, now seen corresponding path program 46 times [2022-01-31 19:10:48,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:48,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276873347] [2022-01-31 19:10:48,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:48,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:48,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:48,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:49,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:49,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276873347] [2022-01-31 19:10:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276873347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:49,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:49,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:10:49,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727570102] [2022-01-31 19:10:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:10:49,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:10:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:10:49,935 INFO L87 Difference]: Start difference. First operand 390 states and 485 transitions. Second operand has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:51,583 INFO L93 Difference]: Finished difference Result 694 states and 890 transitions. [2022-01-31 19:10:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:10:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2022-01-31 19:10:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:51,585 INFO L225 Difference]: With dead ends: 694 [2022-01-31 19:10:51,585 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 19:10:51,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:10:51,586 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1295 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:51,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 58 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 19:10:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 398. [2022-01-31 19:10:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 392 states have (on average 1.25) internal successors, (490), 392 states have internal predecessors, (490), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 495 transitions. [2022-01-31 19:10:51,689 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 495 transitions. Word has length 385 [2022-01-31 19:10:51,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:51,689 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 495 transitions. [2022-01-31 19:10:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.22) internal successors, (111), 49 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 495 transitions. [2022-01-31 19:10:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 19:10:51,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:51,692 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:51,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:10:51,692 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1373639546, now seen corresponding path program 47 times [2022-01-31 19:10:51,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326631001] [2022-01-31 19:10:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:51,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:51,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:51,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:51,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:52,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:52,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326631001] [2022-01-31 19:10:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [326631001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:52,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:52,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 19:10:52,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178805032] [2022-01-31 19:10:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:52,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 19:10:52,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 19:10:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:10:52,693 INFO L87 Difference]: Start difference. First operand 398 states and 495 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:54,375 INFO L93 Difference]: Finished difference Result 708 states and 908 transitions. [2022-01-31 19:10:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:10:54,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 393 [2022-01-31 19:10:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:54,376 INFO L225 Difference]: With dead ends: 708 [2022-01-31 19:10:54,376 INFO L226 Difference]: Without dead ends: 411 [2022-01-31 19:10:54,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:10:54,379 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1423 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:54,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 38 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:10:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-31 19:10:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 406. [2022-01-31 19:10:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 400 states have (on average 1.25) internal successors, (500), 400 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 505 transitions. [2022-01-31 19:10:54,471 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 505 transitions. Word has length 393 [2022-01-31 19:10:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:54,471 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 505 transitions. [2022-01-31 19:10:54,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 505 transitions. [2022-01-31 19:10:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 19:10:54,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:54,473 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:54,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:10:54,475 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1160062065, now seen corresponding path program 48 times [2022-01-31 19:10:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791411538] [2022-01-31 19:10:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:54,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:54,478 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:54,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:54,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:55,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:55,556 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:55,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791411538] [2022-01-31 19:10:55,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791411538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:55,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:55,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:10:55,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44828860] [2022-01-31 19:10:55,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:10:55,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:10:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:10:55,558 INFO L87 Difference]: Start difference. First operand 406 states and 505 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:10:57,313 INFO L93 Difference]: Finished difference Result 722 states and 926 transitions. [2022-01-31 19:10:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:10:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-01-31 19:10:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:10:57,315 INFO L225 Difference]: With dead ends: 722 [2022-01-31 19:10:57,315 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 19:10:57,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:10:57,316 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1305 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:10:57,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 58 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:10:57,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 19:10:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 414. [2022-01-31 19:10:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 408 states have (on average 1.25) internal successors, (510), 408 states have internal predecessors, (510), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:10:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 515 transitions. [2022-01-31 19:10:57,396 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 515 transitions. Word has length 401 [2022-01-31 19:10:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:10:57,396 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 515 transitions. [2022-01-31 19:10:57,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:10:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 515 transitions. [2022-01-31 19:10:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-01-31 19:10:57,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:10:57,398 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:10:57,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:10:57,399 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:10:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:10:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash -857913514, now seen corresponding path program 49 times [2022-01-31 19:10:57,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:10:57,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049017494] [2022-01-31 19:10:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:10:57,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:10:57,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:10:57,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:10:57,414 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:10:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:58,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:10:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:10:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:10:58,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:10:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049017494] [2022-01-31 19:10:58,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049017494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:10:58,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:10:58,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 19:10:58,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948558454] [2022-01-31 19:10:58,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:10:58,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 19:10:58,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:10:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 19:10:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:10:58,530 INFO L87 Difference]: Start difference. First operand 414 states and 515 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 52 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:00,371 INFO L93 Difference]: Finished difference Result 736 states and 944 transitions. [2022-01-31 19:11:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:11:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 52 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 409 [2022-01-31 19:11:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:00,373 INFO L225 Difference]: With dead ends: 736 [2022-01-31 19:11:00,373 INFO L226 Difference]: Without dead ends: 427 [2022-01-31 19:11:00,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:11:00,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1523 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:00,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 38 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-01-31 19:11:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 422. [2022-01-31 19:11:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 416 states have (on average 1.25) internal successors, (520), 416 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 525 transitions. [2022-01-31 19:11:00,454 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 525 transitions. Word has length 409 [2022-01-31 19:11:00,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:00,454 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 525 transitions. [2022-01-31 19:11:00,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 52 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 525 transitions. [2022-01-31 19:11:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-01-31 19:11:00,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:00,457 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:00,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:11:00,457 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 532533389, now seen corresponding path program 50 times [2022-01-31 19:11:00,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:00,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758003534] [2022-01-31 19:11:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:00,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:00,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:00,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:00,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:01,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:01,583 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:01,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758003534] [2022-01-31 19:11:01,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758003534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:01,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:01,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:11:01,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320865219] [2022-01-31 19:11:01,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:01,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:11:01,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:01,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:11:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:11:01,585 INFO L87 Difference]: Start difference. First operand 422 states and 525 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 53 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:03,498 INFO L93 Difference]: Finished difference Result 750 states and 962 transitions. [2022-01-31 19:11:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:11:03,499 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 53 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 417 [2022-01-31 19:11:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:03,500 INFO L225 Difference]: With dead ends: 750 [2022-01-31 19:11:03,500 INFO L226 Difference]: Without dead ends: 435 [2022-01-31 19:11:03,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:11:03,504 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1393 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:03,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 63 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-31 19:11:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 430. [2022-01-31 19:11:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 1.25) internal successors, (530), 424 states have internal predecessors, (530), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 535 transitions. [2022-01-31 19:11:03,600 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 535 transitions. Word has length 417 [2022-01-31 19:11:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:03,601 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 535 transitions. [2022-01-31 19:11:03,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 53 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 535 transitions. [2022-01-31 19:11:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-01-31 19:11:03,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:03,603 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:03,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:11:03,603 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1749098802, now seen corresponding path program 51 times [2022-01-31 19:11:03,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:03,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929481106] [2022-01-31 19:11:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:03,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:03,606 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:03,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:03,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:04,749 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 19:11:04,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:04,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929481106] [2022-01-31 19:11:04,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [929481106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:04,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:04,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 19:11:04,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019624456] [2022-01-31 19:11:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 19:11:04,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 19:11:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:11:04,751 INFO L87 Difference]: Start difference. First operand 430 states and 535 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:06,711 INFO L93 Difference]: Finished difference Result 764 states and 980 transitions. [2022-01-31 19:11:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 19:11:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 425 [2022-01-31 19:11:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:06,712 INFO L225 Difference]: With dead ends: 764 [2022-01-31 19:11:06,712 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 19:11:06,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:11:06,714 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1749 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:06,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 38 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 19:11:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 438. [2022-01-31 19:11:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 432 states have (on average 1.25) internal successors, (540), 432 states have internal predecessors, (540), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2022-01-31 19:11:06,815 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 425 [2022-01-31 19:11:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:06,816 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2022-01-31 19:11:06,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2022-01-31 19:11:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-01-31 19:11:06,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:06,817 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:06,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:11:06,818 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2085309783, now seen corresponding path program 52 times [2022-01-31 19:11:06,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901665643] [2022-01-31 19:11:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:06,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:06,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:06,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:06,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:07,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901665643] [2022-01-31 19:11:07,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901665643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:07,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:07,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:11:07,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027314387] [2022-01-31 19:11:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:11:07,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:11:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:11:07,996 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 55 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:10,046 INFO L93 Difference]: Finished difference Result 778 states and 998 transitions. [2022-01-31 19:11:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:11:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 55 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 433 [2022-01-31 19:11:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:10,048 INFO L225 Difference]: With dead ends: 778 [2022-01-31 19:11:10,048 INFO L226 Difference]: Without dead ends: 451 [2022-01-31 19:11:10,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:11:10,049 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1751 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:10,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 43 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-31 19:11:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 446. [2022-01-31 19:11:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 440 states have (on average 1.25) internal successors, (550), 440 states have internal predecessors, (550), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 555 transitions. [2022-01-31 19:11:10,155 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 555 transitions. Word has length 433 [2022-01-31 19:11:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 555 transitions. [2022-01-31 19:11:10,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 55 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 555 transitions. [2022-01-31 19:11:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-01-31 19:11:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:10,157 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:10,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:11:10,157 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1370267918, now seen corresponding path program 53 times [2022-01-31 19:11:10,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:10,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205237843] [2022-01-31 19:11:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:10,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:10,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:10,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:10,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:11,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205237843] [2022-01-31 19:11:11,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205237843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:11,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:11,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 19:11:11,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080006481] [2022-01-31 19:11:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:11,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 19:11:11,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 19:11:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:11:11,375 INFO L87 Difference]: Start difference. First operand 446 states and 555 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:13,447 INFO L93 Difference]: Finished difference Result 792 states and 1016 transitions. [2022-01-31 19:11:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:11:13,447 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 441 [2022-01-31 19:11:13,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:13,448 INFO L225 Difference]: With dead ends: 792 [2022-01-31 19:11:13,448 INFO L226 Difference]: Without dead ends: 459 [2022-01-31 19:11:13,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:11:13,449 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1603 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:13,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1604 Valid, 48 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-31 19:11:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 454. [2022-01-31 19:11:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 448 states have (on average 1.25) internal successors, (560), 448 states have internal predecessors, (560), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 565 transitions. [2022-01-31 19:11:13,540 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 565 transitions. Word has length 441 [2022-01-31 19:11:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:13,540 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 565 transitions. [2022-01-31 19:11:13,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 565 transitions. [2022-01-31 19:11:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-01-31 19:11:13,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:13,542 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:13,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:11:13,542 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1767978299, now seen corresponding path program 54 times [2022-01-31 19:11:13,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:13,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971089584] [2022-01-31 19:11:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:13,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:13,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:13,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:13,574 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:14,809 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 19:11:14,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:14,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971089584] [2022-01-31 19:11:14,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971089584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:14,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:14,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:11:14,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888779325] [2022-01-31 19:11:14,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:14,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:11:14,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:14,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:11:14,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:11:14,811 INFO L87 Difference]: Start difference. First operand 454 states and 565 transitions. Second operand has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 57 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:16,971 INFO L93 Difference]: Finished difference Result 806 states and 1034 transitions. [2022-01-31 19:11:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:11:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 57 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 449 [2022-01-31 19:11:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:16,972 INFO L225 Difference]: With dead ends: 806 [2022-01-31 19:11:16,972 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 19:11:16,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:11:16,974 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1599 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:16,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 53 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 19:11:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 462. [2022-01-31 19:11:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 456 states have (on average 1.25) internal successors, (570), 456 states have internal predecessors, (570), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 575 transitions. [2022-01-31 19:11:17,071 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 575 transitions. Word has length 449 [2022-01-31 19:11:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:17,072 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 575 transitions. [2022-01-31 19:11:17,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.189655172413793) internal successors, (127), 57 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 575 transitions. [2022-01-31 19:11:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-01-31 19:11:17,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:17,074 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:17,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:11:17,074 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:17,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1774241514, now seen corresponding path program 55 times [2022-01-31 19:11:17,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:17,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145004273] [2022-01-31 19:11:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:17,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:17,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:17,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:17,090 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:18,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:18,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:18,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145004273] [2022-01-31 19:11:18,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145004273] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:18,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:18,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:11:18,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415688727] [2022-01-31 19:11:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:18,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:11:18,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:11:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:11:18,366 INFO L87 Difference]: Start difference. First operand 462 states and 575 transitions. Second operand has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 58 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:20,563 INFO L93 Difference]: Finished difference Result 820 states and 1052 transitions. [2022-01-31 19:11:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:11:20,563 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 58 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 457 [2022-01-31 19:11:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:20,564 INFO L225 Difference]: With dead ends: 820 [2022-01-31 19:11:20,564 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 19:11:20,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:11:20,566 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1607 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:20,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 48 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 19:11:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 470. [2022-01-31 19:11:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 464 states have (on average 1.25) internal successors, (580), 464 states have internal predecessors, (580), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 585 transitions. [2022-01-31 19:11:20,664 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 585 transitions. Word has length 457 [2022-01-31 19:11:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 585 transitions. [2022-01-31 19:11:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1864406779661016) internal successors, (129), 58 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 585 transitions. [2022-01-31 19:11:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-01-31 19:11:20,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:20,666 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:20,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:11:20,667 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1710155551, now seen corresponding path program 56 times [2022-01-31 19:11:20,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:20,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110896594] [2022-01-31 19:11:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:20,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:20,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:20,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:20,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:22,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:22,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:22,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110896594] [2022-01-31 19:11:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110896594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:22,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:22,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:11:22,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304612211] [2022-01-31 19:11:22,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:11:22,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:11:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:11:22,006 INFO L87 Difference]: Start difference. First operand 470 states and 585 transitions. Second operand has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 59 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:24,285 INFO L93 Difference]: Finished difference Result 834 states and 1070 transitions. [2022-01-31 19:11:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:11:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 59 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 465 [2022-01-31 19:11:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:24,287 INFO L225 Difference]: With dead ends: 834 [2022-01-31 19:11:24,287 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 19:11:24,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:11:24,288 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1453 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:24,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 58 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 19:11:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 478. [2022-01-31 19:11:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 472 states have (on average 1.25) internal successors, (590), 472 states have internal predecessors, (590), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 595 transitions. [2022-01-31 19:11:24,388 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 595 transitions. Word has length 465 [2022-01-31 19:11:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:24,388 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 595 transitions. [2022-01-31 19:11:24,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.183333333333333) internal successors, (131), 59 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 595 transitions. [2022-01-31 19:11:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-01-31 19:11:24,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:24,390 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:24,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:11:24,390 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1679725254, now seen corresponding path program 57 times [2022-01-31 19:11:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788406490] [2022-01-31 19:11:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:24,392 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:24,392 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:24,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:24,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:25,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:25,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788406490] [2022-01-31 19:11:25,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788406490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:25,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:25,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 19:11:25,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751308515] [2022-01-31 19:11:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:25,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 19:11:25,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 19:11:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:11:25,772 INFO L87 Difference]: Start difference. First operand 478 states and 595 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:28,089 INFO L93 Difference]: Finished difference Result 848 states and 1088 transitions. [2022-01-31 19:11:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:11:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 473 [2022-01-31 19:11:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:28,090 INFO L225 Difference]: With dead ends: 848 [2022-01-31 19:11:28,091 INFO L226 Difference]: Without dead ends: 491 [2022-01-31 19:11:28,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:11:28,092 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1653 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:28,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 48 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-31 19:11:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 486. [2022-01-31 19:11:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.25) internal successors, (600), 480 states have internal predecessors, (600), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 605 transitions. [2022-01-31 19:11:28,230 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 605 transitions. Word has length 473 [2022-01-31 19:11:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:28,231 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 605 transitions. [2022-01-31 19:11:28,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 605 transitions. [2022-01-31 19:11:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-01-31 19:11:28,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:28,233 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:28,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:11:28,234 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1268817149, now seen corresponding path program 58 times [2022-01-31 19:11:28,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646262709] [2022-01-31 19:11:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:28,236 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:28,236 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:28,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:28,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:29,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:29,800 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 19:11:29,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:29,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646262709] [2022-01-31 19:11:29,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646262709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:29,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:29,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:11:29,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212370872] [2022-01-31 19:11:29,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:29,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:11:29,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:11:29,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:11:29,801 INFO L87 Difference]: Start difference. First operand 486 states and 605 transitions. Second operand has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:32,224 INFO L93 Difference]: Finished difference Result 862 states and 1106 transitions. [2022-01-31 19:11:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:11:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 481 [2022-01-31 19:11:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:32,226 INFO L225 Difference]: With dead ends: 862 [2022-01-31 19:11:32,226 INFO L226 Difference]: Without dead ends: 499 [2022-01-31 19:11:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:11:32,227 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1817 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:32,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 38 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:11:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-31 19:11:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 494. [2022-01-31 19:11:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 488 states have (on average 1.25) internal successors, (610), 488 states have internal predecessors, (610), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 615 transitions. [2022-01-31 19:11:32,357 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 615 transitions. Word has length 481 [2022-01-31 19:11:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:32,357 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 615 transitions. [2022-01-31 19:11:32,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.1774193548387095) internal successors, (135), 61 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 615 transitions. [2022-01-31 19:11:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-01-31 19:11:32,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:32,360 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:32,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:11:32,360 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash -412679006, now seen corresponding path program 59 times [2022-01-31 19:11:32,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:32,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877203597] [2022-01-31 19:11:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:32,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:32,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:32,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:32,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:33,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:33,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877203597] [2022-01-31 19:11:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [877203597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:33,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 19:11:33,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328544266] [2022-01-31 19:11:33,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 19:11:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 19:11:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:11:33,772 INFO L87 Difference]: Start difference. First operand 494 states and 615 transitions. Second operand has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 62 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:36,312 INFO L93 Difference]: Finished difference Result 876 states and 1124 transitions. [2022-01-31 19:11:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 19:11:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 62 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 489 [2022-01-31 19:11:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:36,314 INFO L225 Difference]: With dead ends: 876 [2022-01-31 19:11:36,314 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 19:11:36,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:11:36,315 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1957 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:36,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 33 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 19:11:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 502. [2022-01-31 19:11:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 496 states have (on average 1.25) internal successors, (620), 496 states have internal predecessors, (620), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 625 transitions. [2022-01-31 19:11:36,427 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 625 transitions. Word has length 489 [2022-01-31 19:11:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:36,427 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 625 transitions. [2022-01-31 19:11:36,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 62 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 625 transitions. [2022-01-31 19:11:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2022-01-31 19:11:36,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:36,429 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:36,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:11:36,429 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1155684121, now seen corresponding path program 60 times [2022-01-31 19:11:36,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:36,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781972417] [2022-01-31 19:11:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:36,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:36,431 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:36,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:36,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:37,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781972417] [2022-01-31 19:11:37,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781972417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:37,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:37,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 19:11:37,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719125154] [2022-01-31 19:11:37,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:37,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 19:11:37,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:37,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 19:11:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:11:37,945 INFO L87 Difference]: Start difference. First operand 502 states and 625 transitions. Second operand has 64 states, 64 states have (on average 2.171875) internal successors, (139), 63 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:40,520 INFO L93 Difference]: Finished difference Result 890 states and 1142 transitions. [2022-01-31 19:11:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:11:40,520 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 63 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 497 [2022-01-31 19:11:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:40,522 INFO L225 Difference]: With dead ends: 890 [2022-01-31 19:11:40,522 INFO L226 Difference]: Without dead ends: 515 [2022-01-31 19:11:40,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:11:40,523 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1743 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:40,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 53 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-31 19:11:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 510. [2022-01-31 19:11:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 504 states have (on average 1.25) internal successors, (630), 504 states have internal predecessors, (630), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:40,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 635 transitions. [2022-01-31 19:11:40,655 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 635 transitions. Word has length 497 [2022-01-31 19:11:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:40,655 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 635 transitions. [2022-01-31 19:11:40,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.171875) internal successors, (139), 63 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 635 transitions. [2022-01-31 19:11:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-01-31 19:11:40,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:40,657 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:40,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:11:40,657 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1388635010, now seen corresponding path program 61 times [2022-01-31 19:11:40,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:40,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286869978] [2022-01-31 19:11:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:40,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:40,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:40,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:42,151 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:42,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286869978] [2022-01-31 19:11:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [286869978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:42,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:42,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:11:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194332809] [2022-01-31 19:11:42,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:42,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:11:42,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:11:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:11:42,153 INFO L87 Difference]: Start difference. First operand 510 states and 635 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 64 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:44,802 INFO L93 Difference]: Finished difference Result 904 states and 1160 transitions. [2022-01-31 19:11:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:11:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 64 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 505 [2022-01-31 19:11:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:44,804 INFO L225 Difference]: With dead ends: 904 [2022-01-31 19:11:44,804 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 19:11:44,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 19:11:44,805 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2027 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:44,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 38 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 19:11:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 518. [2022-01-31 19:11:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 512 states have (on average 1.25) internal successors, (640), 512 states have internal predecessors, (640), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 645 transitions. [2022-01-31 19:11:44,922 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 645 transitions. Word has length 505 [2022-01-31 19:11:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:44,922 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 645 transitions. [2022-01-31 19:11:44,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 64 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 645 transitions. [2022-01-31 19:11:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-01-31 19:11:44,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:44,925 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:44,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:11:44,925 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1533757237, now seen corresponding path program 62 times [2022-01-31 19:11:44,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:44,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741772643] [2022-01-31 19:11:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:44,927 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:44,927 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:44,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:44,943 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:46,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741772643] [2022-01-31 19:11:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741772643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:46,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:46,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:11:46,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94858898] [2022-01-31 19:11:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:46,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:11:46,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:11:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:11:46,525 INFO L87 Difference]: Start difference. First operand 518 states and 645 transitions. Second operand has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:49,270 INFO L93 Difference]: Finished difference Result 918 states and 1178 transitions. [2022-01-31 19:11:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 19:11:49,270 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 513 [2022-01-31 19:11:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:49,272 INFO L225 Difference]: With dead ends: 918 [2022-01-31 19:11:49,272 INFO L226 Difference]: Without dead ends: 531 [2022-01-31 19:11:49,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 19:11:49,273 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1999 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:49,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2000 Valid, 43 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-31 19:11:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 526. [2022-01-31 19:11:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 520 states have (on average 1.25) internal successors, (650), 520 states have internal predecessors, (650), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 655 transitions. [2022-01-31 19:11:49,405 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 655 transitions. Word has length 513 [2022-01-31 19:11:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:49,405 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 655 transitions. [2022-01-31 19:11:49,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1666666666666665) internal successors, (143), 65 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 655 transitions. [2022-01-31 19:11:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-01-31 19:11:49,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:49,409 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:49,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:11:49,409 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1573135782, now seen corresponding path program 63 times [2022-01-31 19:11:49,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:49,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137946700] [2022-01-31 19:11:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:49,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:49,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:49,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:49,434 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:51,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137946700] [2022-01-31 19:11:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [137946700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:51,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 19:11:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393249997] [2022-01-31 19:11:51,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:51,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 19:11:51,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 19:11:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:11:51,220 INFO L87 Difference]: Start difference. First operand 526 states and 655 transitions. Second operand has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 66 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:54,022 INFO L93 Difference]: Finished difference Result 932 states and 1196 transitions. [2022-01-31 19:11:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:11:54,023 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 66 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 521 [2022-01-31 19:11:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:54,024 INFO L225 Difference]: With dead ends: 932 [2022-01-31 19:11:54,024 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 19:11:54,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 19:11:54,026 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1827 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 631 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:54,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 38 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [631 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 19:11:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 534. [2022-01-31 19:11:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 528 states have (on average 1.25) internal successors, (660), 528 states have internal predecessors, (660), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 665 transitions. [2022-01-31 19:11:54,169 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 665 transitions. Word has length 521 [2022-01-31 19:11:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:54,170 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 665 transitions. [2022-01-31 19:11:54,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 66 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 665 transitions. [2022-01-31 19:11:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-01-31 19:11:54,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:54,172 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:54,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:11:54,172 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 13659473, now seen corresponding path program 64 times [2022-01-31 19:11:54,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:54,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182221563] [2022-01-31 19:11:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:54,175 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:54,175 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:54,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:54,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:55,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:11:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:11:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:11:55,845 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:11:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182221563] [2022-01-31 19:11:55,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [182221563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:11:55,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:11:55,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 19:11:55,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813907808] [2022-01-31 19:11:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:11:55,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 19:11:55,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:11:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 19:11:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:11:55,846 INFO L87 Difference]: Start difference. First operand 534 states and 665 transitions. Second operand has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 67 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:11:58,775 INFO L93 Difference]: Finished difference Result 946 states and 1214 transitions. [2022-01-31 19:11:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:11:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 67 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 529 [2022-01-31 19:11:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:11:58,776 INFO L225 Difference]: With dead ends: 946 [2022-01-31 19:11:58,776 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 19:11:58,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 19:11:58,778 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2021 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2022 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:11:58,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2022 Valid, 43 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:11:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 19:11:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 542. [2022-01-31 19:11:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 536 states have (on average 1.25) internal successors, (670), 536 states have internal predecessors, (670), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:11:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 675 transitions. [2022-01-31 19:11:58,908 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 675 transitions. Word has length 529 [2022-01-31 19:11:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:11:58,908 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 675 transitions. [2022-01-31 19:11:58,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.161764705882353) internal successors, (147), 67 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:11:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 675 transitions. [2022-01-31 19:11:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-01-31 19:11:58,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:11:58,911 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:11:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:11:58,911 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:11:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:11:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 101334582, now seen corresponding path program 65 times [2022-01-31 19:11:58,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:11:58,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126692766] [2022-01-31 19:11:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:11:58,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:11:58,913 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:11:58,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:11:58,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:11:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:00,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:00,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:00,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126692766] [2022-01-31 19:12:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2126692766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:00,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:00,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:12:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191539651] [2022-01-31 19:12:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:00,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:12:00,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:12:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:12:00,635 INFO L87 Difference]: Start difference. First operand 542 states and 675 transitions. Second operand has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 68 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:03,626 INFO L93 Difference]: Finished difference Result 960 states and 1232 transitions. [2022-01-31 19:12:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:12:03,626 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 68 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 537 [2022-01-31 19:12:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:03,628 INFO L225 Difference]: With dead ends: 960 [2022-01-31 19:12:03,628 INFO L226 Difference]: Without dead ends: 555 [2022-01-31 19:12:03,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:12:03,629 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2029 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:03,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2030 Valid, 43 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:12:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-31 19:12:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 550. [2022-01-31 19:12:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 544 states have (on average 1.25) internal successors, (680), 544 states have internal predecessors, (680), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 685 transitions. [2022-01-31 19:12:03,765 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 685 transitions. Word has length 537 [2022-01-31 19:12:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:03,765 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 685 transitions. [2022-01-31 19:12:03,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 68 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 685 transitions. [2022-01-31 19:12:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-01-31 19:12:03,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:03,768 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:03,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:12:03,769 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1566127763, now seen corresponding path program 66 times [2022-01-31 19:12:03,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:03,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561582730] [2022-01-31 19:12:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:03,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:03,771 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:03,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:05,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:05,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:05,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561582730] [2022-01-31 19:12:05,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561582730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:05,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:05,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 19:12:05,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618846971] [2022-01-31 19:12:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:05,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 19:12:05,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 19:12:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:12:05,628 INFO L87 Difference]: Start difference. First operand 550 states and 685 transitions. Second operand has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 69 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:08,737 INFO L93 Difference]: Finished difference Result 974 states and 1250 transitions. [2022-01-31 19:12:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 19:12:08,738 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 69 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 545 [2022-01-31 19:12:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:08,739 INFO L225 Difference]: With dead ends: 974 [2022-01-31 19:12:08,739 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 19:12:08,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:12:08,741 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2475 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:08,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2476 Valid, 43 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 19:12:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 558. [2022-01-31 19:12:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 552 states have (on average 1.25) internal successors, (690), 552 states have internal predecessors, (690), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 695 transitions. [2022-01-31 19:12:08,889 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 695 transitions. Word has length 545 [2022-01-31 19:12:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:08,890 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 695 transitions. [2022-01-31 19:12:08,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.157142857142857) internal successors, (151), 69 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 695 transitions. [2022-01-31 19:12:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-01-31 19:12:08,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:08,893 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:12:08,893 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262766, now seen corresponding path program 67 times [2022-01-31 19:12:08,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:08,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787744936] [2022-01-31 19:12:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:08,896 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:08,896 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:08,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:08,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:10,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787744936] [2022-01-31 19:12:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787744936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:10,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 19:12:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672761204] [2022-01-31 19:12:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 19:12:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 19:12:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:12:10,803 INFO L87 Difference]: Start difference. First operand 558 states and 695 transitions. Second operand has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 70 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:14,057 INFO L93 Difference]: Finished difference Result 988 states and 1268 transitions. [2022-01-31 19:12:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:12:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 70 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 553 [2022-01-31 19:12:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:14,059 INFO L225 Difference]: With dead ends: 988 [2022-01-31 19:12:14,059 INFO L226 Difference]: Without dead ends: 571 [2022-01-31 19:12:14,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:12:14,060 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2057 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:14,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 58 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-31 19:12:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 566. [2022-01-31 19:12:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 560 states have (on average 1.25) internal successors, (700), 560 states have internal predecessors, (700), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 705 transitions. [2022-01-31 19:12:14,201 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 705 transitions. Word has length 553 [2022-01-31 19:12:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:14,201 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 705 transitions. [2022-01-31 19:12:14,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 70 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 705 transitions. [2022-01-31 19:12:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2022-01-31 19:12:14,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:14,204 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:14,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:12:14,204 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 176380809, now seen corresponding path program 68 times [2022-01-31 19:12:14,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:14,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611987042] [2022-01-31 19:12:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:14,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:14,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:14,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:14,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:16,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:16,067 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611987042] [2022-01-31 19:12:16,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [611987042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:16,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:16,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 19:12:16,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346489270] [2022-01-31 19:12:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:16,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 19:12:16,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 19:12:16,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:12:16,069 INFO L87 Difference]: Start difference. First operand 566 states and 705 transitions. Second operand has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 71 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:19,386 INFO L93 Difference]: Finished difference Result 1002 states and 1286 transitions. [2022-01-31 19:12:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 19:12:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 71 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 561 [2022-01-31 19:12:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:19,388 INFO L225 Difference]: With dead ends: 1002 [2022-01-31 19:12:19,388 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 19:12:19,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 19:12:19,389 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2125 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 731 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2126 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:19,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2126 Valid, 43 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 19:12:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2022-01-31 19:12:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 568 states have (on average 1.25) internal successors, (710), 568 states have internal predecessors, (710), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 715 transitions. [2022-01-31 19:12:19,533 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 715 transitions. Word has length 561 [2022-01-31 19:12:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:19,533 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 715 transitions. [2022-01-31 19:12:19,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 71 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 715 transitions. [2022-01-31 19:12:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2022-01-31 19:12:19,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:19,536 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:19,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:12:19,536 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2006185966, now seen corresponding path program 69 times [2022-01-31 19:12:19,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:19,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570907203] [2022-01-31 19:12:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:19,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:19,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:19,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:19,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:21,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:21,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:21,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570907203] [2022-01-31 19:12:21,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [570907203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:21,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:21,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 19:12:21,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995380366] [2022-01-31 19:12:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:21,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 19:12:21,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 19:12:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:12:21,439 INFO L87 Difference]: Start difference. First operand 574 states and 715 transitions. Second operand has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:24,755 INFO L93 Difference]: Finished difference Result 1016 states and 1304 transitions. [2022-01-31 19:12:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:12:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 569 [2022-01-31 19:12:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:24,757 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 19:12:24,757 INFO L226 Difference]: Without dead ends: 587 [2022-01-31 19:12:24,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 19:12:24,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2013 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2014 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:24,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2014 Valid, 58 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-31 19:12:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 582. [2022-01-31 19:12:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 576 states have (on average 1.25) internal successors, (720), 576 states have internal predecessors, (720), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 725 transitions. [2022-01-31 19:12:24,934 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 725 transitions. Word has length 569 [2022-01-31 19:12:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:24,934 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 725 transitions. [2022-01-31 19:12:24,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.1506849315068495) internal successors, (157), 72 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 725 transitions. [2022-01-31 19:12:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2022-01-31 19:12:24,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:24,937 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:24,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:12:24,937 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:24,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1107614811, now seen corresponding path program 70 times [2022-01-31 19:12:24,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:24,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240690793] [2022-01-31 19:12:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:24,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:24,939 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:24,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:24,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:26,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240690793] [2022-01-31 19:12:26,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240690793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:26,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:26,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 19:12:26,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966317472] [2022-01-31 19:12:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:26,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 19:12:26,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 19:12:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:12:26,886 INFO L87 Difference]: Start difference. First operand 582 states and 725 transitions. Second operand has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 73 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:30,364 INFO L93 Difference]: Finished difference Result 1030 states and 1322 transitions. [2022-01-31 19:12:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:12:30,365 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 73 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 577 [2022-01-31 19:12:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:30,366 INFO L225 Difference]: With dead ends: 1030 [2022-01-31 19:12:30,366 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 19:12:30,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 19:12:30,368 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2435 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:30,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 43 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 19:12:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 590. [2022-01-31 19:12:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 584 states have (on average 1.25) internal successors, (730), 584 states have internal predecessors, (730), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 735 transitions. [2022-01-31 19:12:30,546 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 735 transitions. Word has length 577 [2022-01-31 19:12:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:30,547 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 735 transitions. [2022-01-31 19:12:30,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 73 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 735 transitions. [2022-01-31 19:12:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2022-01-31 19:12:30,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:30,550 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:30,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:12:30,550 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1013887542, now seen corresponding path program 71 times [2022-01-31 19:12:30,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:30,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37922876] [2022-01-31 19:12:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:30,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:30,553 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:30,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:30,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:32,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37922876] [2022-01-31 19:12:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37922876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:32,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:32,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:12:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587706855] [2022-01-31 19:12:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:32,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:12:32,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:12:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:12:32,520 INFO L87 Difference]: Start difference. First operand 590 states and 735 transitions. Second operand has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 74 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:36,111 INFO L93 Difference]: Finished difference Result 1044 states and 1340 transitions. [2022-01-31 19:12:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 19:12:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 74 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 585 [2022-01-31 19:12:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:36,113 INFO L225 Difference]: With dead ends: 1044 [2022-01-31 19:12:36,113 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 19:12:36,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 19:12:36,114 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2761 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:36,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2762 Valid, 33 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 19:12:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 598. [2022-01-31 19:12:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 592 states have (on average 1.25) internal successors, (740), 592 states have internal predecessors, (740), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 745 transitions. [2022-01-31 19:12:36,295 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 745 transitions. Word has length 585 [2022-01-31 19:12:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:36,295 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 745 transitions. [2022-01-31 19:12:36,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 74 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 745 transitions. [2022-01-31 19:12:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-01-31 19:12:36,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:36,298 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:36,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:12:36,298 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1587749313, now seen corresponding path program 72 times [2022-01-31 19:12:36,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:36,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596268831] [2022-01-31 19:12:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:36,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:36,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:36,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:36,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:38,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:38,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596268831] [2022-01-31 19:12:38,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596268831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:38,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:38,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 19:12:38,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053254461] [2022-01-31 19:12:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:38,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 19:12:38,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 19:12:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:12:38,318 INFO L87 Difference]: Start difference. First operand 598 states and 745 transitions. Second operand has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 75 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:41,992 INFO L93 Difference]: Finished difference Result 1058 states and 1358 transitions. [2022-01-31 19:12:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 19:12:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 75 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 593 [2022-01-31 19:12:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:41,994 INFO L225 Difference]: With dead ends: 1058 [2022-01-31 19:12:41,994 INFO L226 Difference]: Without dead ends: 611 [2022-01-31 19:12:41,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 19:12:41,995 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2187 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2188 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:41,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2188 Valid, 48 Invalid, 1566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-31 19:12:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 606. [2022-01-31 19:12:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 600 states have (on average 1.25) internal successors, (750), 600 states have internal predecessors, (750), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 755 transitions. [2022-01-31 19:12:42,181 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 755 transitions. Word has length 593 [2022-01-31 19:12:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:42,181 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 755 transitions. [2022-01-31 19:12:42,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.1447368421052633) internal successors, (163), 75 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 755 transitions. [2022-01-31 19:12:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-01-31 19:12:42,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:42,184 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:12:42,184 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:42,184 INFO L85 PathProgramCache]: Analyzing trace with hash 987777446, now seen corresponding path program 73 times [2022-01-31 19:12:42,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:42,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734298513] [2022-01-31 19:12:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:42,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:42,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:42,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:42,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:44,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734298513] [2022-01-31 19:12:44,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734298513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:44,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:44,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:12:44,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275431070] [2022-01-31 19:12:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:44,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:12:44,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:12:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:12:44,256 INFO L87 Difference]: Start difference. First operand 606 states and 755 transitions. Second operand has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 76 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:47,996 INFO L93 Difference]: Finished difference Result 1072 states and 1376 transitions. [2022-01-31 19:12:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:12:47,996 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 76 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 601 [2022-01-31 19:12:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:47,998 INFO L225 Difference]: With dead ends: 1072 [2022-01-31 19:12:47,998 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 19:12:47,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:12:48,000 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2315 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2316 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:48,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2316 Valid, 43 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 19:12:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 614. [2022-01-31 19:12:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 608 states have (on average 1.25) internal successors, (760), 608 states have internal predecessors, (760), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 765 transitions. [2022-01-31 19:12:48,194 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 765 transitions. Word has length 601 [2022-01-31 19:12:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:48,194 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 765 transitions. [2022-01-31 19:12:48,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.142857142857143) internal successors, (165), 76 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 765 transitions. [2022-01-31 19:12:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2022-01-31 19:12:48,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:48,197 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:12:48,197 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 168842717, now seen corresponding path program 74 times [2022-01-31 19:12:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087002091] [2022-01-31 19:12:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:48,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:48,200 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:48,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:48,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:50,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:50,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:50,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087002091] [2022-01-31 19:12:50,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087002091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:50,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:50,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 19:12:50,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245098604] [2022-01-31 19:12:50,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:50,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 19:12:50,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 19:12:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:12:50,432 INFO L87 Difference]: Start difference. First operand 614 states and 765 transitions. Second operand has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 77 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:12:54,323 INFO L93 Difference]: Finished difference Result 1086 states and 1394 transitions. [2022-01-31 19:12:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 19:12:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 77 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 609 [2022-01-31 19:12:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:12:54,325 INFO L225 Difference]: With dead ends: 1086 [2022-01-31 19:12:54,325 INFO L226 Difference]: Without dead ends: 627 [2022-01-31 19:12:54,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 19:12:54,326 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2497 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:12:54,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2498 Valid, 33 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:12:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-31 19:12:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 622. [2022-01-31 19:12:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 616 states have (on average 1.25) internal successors, (770), 616 states have internal predecessors, (770), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:12:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 775 transitions. [2022-01-31 19:12:54,528 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 775 transitions. Word has length 609 [2022-01-31 19:12:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:12:54,529 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 775 transitions. [2022-01-31 19:12:54,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.141025641025641) internal successors, (167), 77 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:12:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 775 transitions. [2022-01-31 19:12:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-01-31 19:12:54,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:12:54,532 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:12:54,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:12:54,532 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:12:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:12:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1675498622, now seen corresponding path program 75 times [2022-01-31 19:12:54,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:12:54,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153165054] [2022-01-31 19:12:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:12:54,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:12:54,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:12:54,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:12:54,562 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:12:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:56,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:12:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:12:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:12:56,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:12:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153165054] [2022-01-31 19:12:56,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153165054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:12:56,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:12:56,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:12:56,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743136625] [2022-01-31 19:12:56,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:12:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:12:56,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:12:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:12:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:12:56,737 INFO L87 Difference]: Start difference. First operand 622 states and 775 transitions. Second operand has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 78 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:00,659 INFO L93 Difference]: Finished difference Result 1100 states and 1412 transitions. [2022-01-31 19:13:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:13:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 78 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 617 [2022-01-31 19:13:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:00,660 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 19:13:00,661 INFO L226 Difference]: Without dead ends: 635 [2022-01-31 19:13:00,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 19:13:00,662 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2403 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 828 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:00,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 53 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:13:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-31 19:13:00,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 630. [2022-01-31 19:13:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 624 states have (on average 1.25) internal successors, (780), 624 states have internal predecessors, (780), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 785 transitions. [2022-01-31 19:13:00,838 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 785 transitions. Word has length 617 [2022-01-31 19:13:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:00,838 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 785 transitions. [2022-01-31 19:13:00,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 78 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 785 transitions. [2022-01-31 19:13:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2022-01-31 19:13:00,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:00,841 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:00,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:13:00,841 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1177042951, now seen corresponding path program 76 times [2022-01-31 19:13:00,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:00,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522378968] [2022-01-31 19:13:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:00,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:00,843 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:00,873 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:03,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:03,196 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 19:13:03,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:03,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522378968] [2022-01-31 19:13:03,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522378968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:03,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:03,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:13:03,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877681416] [2022-01-31 19:13:03,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:03,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:13:03,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:03,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:13:03,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:13:03,198 INFO L87 Difference]: Start difference. First operand 630 states and 785 transitions. Second operand has 80 states, 80 states have (on average 2.1375) internal successors, (171), 79 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:07,383 INFO L93 Difference]: Finished difference Result 1114 states and 1430 transitions. [2022-01-31 19:13:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:13:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 79 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 625 [2022-01-31 19:13:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:07,385 INFO L225 Difference]: With dead ends: 1114 [2022-01-31 19:13:07,385 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 19:13:07,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 19:13:07,387 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2645 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:07,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 33 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 19:13:07,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 638. [2022-01-31 19:13:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 632 states have (on average 1.25) internal successors, (790), 632 states have internal predecessors, (790), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 795 transitions. [2022-01-31 19:13:07,566 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 795 transitions. Word has length 625 [2022-01-31 19:13:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:07,566 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 795 transitions. [2022-01-31 19:13:07,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.1375) internal successors, (171), 79 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 795 transitions. [2022-01-31 19:13:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2022-01-31 19:13:07,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:07,569 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:07,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:13:07,569 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1191759010, now seen corresponding path program 77 times [2022-01-31 19:13:07,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:07,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758613764] [2022-01-31 19:13:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:07,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:07,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:07,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:07,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:09,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758613764] [2022-01-31 19:13:09,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758613764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:09,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:09,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 19:13:09,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327827029] [2022-01-31 19:13:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 19:13:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 19:13:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:13:09,948 INFO L87 Difference]: Start difference. First operand 638 states and 795 transitions. Second operand has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 80 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:14,241 INFO L93 Difference]: Finished difference Result 1128 states and 1448 transitions. [2022-01-31 19:13:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 19:13:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 80 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 633 [2022-01-31 19:13:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:14,243 INFO L225 Difference]: With dead ends: 1128 [2022-01-31 19:13:14,243 INFO L226 Difference]: Without dead ends: 651 [2022-01-31 19:13:14,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 19:13:14,245 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2785 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:14,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 43 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-01-31 19:13:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 646. [2022-01-31 19:13:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.25) internal successors, (800), 640 states have internal predecessors, (800), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 805 transitions. [2022-01-31 19:13:14,467 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 805 transitions. Word has length 633 [2022-01-31 19:13:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:14,468 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 805 transitions. [2022-01-31 19:13:14,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.1358024691358026) internal successors, (173), 80 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 805 transitions. [2022-01-31 19:13:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-01-31 19:13:14,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:14,471 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:14,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:13:14,471 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1550950379, now seen corresponding path program 78 times [2022-01-31 19:13:14,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:14,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635148138] [2022-01-31 19:13:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:14,473 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:14,473 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:14,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:14,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:16,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:16,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635148138] [2022-01-31 19:13:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635148138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:16,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:16,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 19:13:16,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739570013] [2022-01-31 19:13:16,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 19:13:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 19:13:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:13:16,776 INFO L87 Difference]: Start difference. First operand 646 states and 805 transitions. Second operand has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 81 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:21,095 INFO L93 Difference]: Finished difference Result 1142 states and 1466 transitions. [2022-01-31 19:13:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 19:13:21,095 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 81 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 641 [2022-01-31 19:13:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:21,098 INFO L225 Difference]: With dead ends: 1142 [2022-01-31 19:13:21,098 INFO L226 Difference]: Without dead ends: 659 [2022-01-31 19:13:21,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 19:13:21,101 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2541 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:21,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2542 Valid, 58 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-31 19:13:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 654. [2022-01-31 19:13:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 648 states have (on average 1.25) internal successors, (810), 648 states have internal predecessors, (810), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 815 transitions. [2022-01-31 19:13:21,329 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 815 transitions. Word has length 641 [2022-01-31 19:13:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:21,330 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 815 transitions. [2022-01-31 19:13:21,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 81 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 815 transitions. [2022-01-31 19:13:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2022-01-31 19:13:21,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:21,333 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:21,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:13:21,333 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1778310854, now seen corresponding path program 79 times [2022-01-31 19:13:21,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:21,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480040719] [2022-01-31 19:13:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:21,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:21,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:21,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:21,368 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:23,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:23,704 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 19:13:23,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:23,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480040719] [2022-01-31 19:13:23,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [480040719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:23,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:13:23,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917846830] [2022-01-31 19:13:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:23,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:13:23,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:13:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:13:23,706 INFO L87 Difference]: Start difference. First operand 654 states and 815 transitions. Second operand has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 82 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:28,398 INFO L93 Difference]: Finished difference Result 1156 states and 1484 transitions. [2022-01-31 19:13:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:13:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 82 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 649 [2022-01-31 19:13:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:28,400 INFO L225 Difference]: With dead ends: 1156 [2022-01-31 19:13:28,400 INFO L226 Difference]: Without dead ends: 667 [2022-01-31 19:13:28,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 19:13:28,402 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3173 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3174 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:28,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3174 Valid, 43 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-31 19:13:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 662. [2022-01-31 19:13:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 656 states have (on average 1.25) internal successors, (820), 656 states have internal predecessors, (820), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 825 transitions. [2022-01-31 19:13:28,597 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 825 transitions. Word has length 649 [2022-01-31 19:13:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:28,597 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 825 transitions. [2022-01-31 19:13:28,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 82 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 825 transitions. [2022-01-31 19:13:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2022-01-31 19:13:28,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:28,601 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:28,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:13:28,601 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1731643855, now seen corresponding path program 80 times [2022-01-31 19:13:28,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:28,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829337671] [2022-01-31 19:13:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:28,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:28,603 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:28,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:31,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:31,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:31,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829337671] [2022-01-31 19:13:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [829337671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:31,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:31,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:13:31,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112845319] [2022-01-31 19:13:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:31,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:13:31,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:13:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:13:31,164 INFO L87 Difference]: Start difference. First operand 662 states and 825 transitions. Second operand has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 83 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:35,676 INFO L93 Difference]: Finished difference Result 1170 states and 1502 transitions. [2022-01-31 19:13:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 19:13:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 83 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 657 [2022-01-31 19:13:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:35,681 INFO L225 Difference]: With dead ends: 1170 [2022-01-31 19:13:35,681 INFO L226 Difference]: Without dead ends: 675 [2022-01-31 19:13:35,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 19:13:35,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2371 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:35,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2372 Valid, 43 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-31 19:13:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 670. [2022-01-31 19:13:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 664 states have (on average 1.25) internal successors, (830), 664 states have internal predecessors, (830), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 835 transitions. [2022-01-31 19:13:35,882 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 835 transitions. Word has length 657 [2022-01-31 19:13:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:35,883 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 835 transitions. [2022-01-31 19:13:35,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.130952380952381) internal successors, (179), 83 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 835 transitions. [2022-01-31 19:13:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2022-01-31 19:13:35,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:35,886 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:35,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:13:35,886 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1964985066, now seen corresponding path program 81 times [2022-01-31 19:13:35,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:35,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676080815] [2022-01-31 19:13:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:35,888 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:35,888 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:35,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:35,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:38,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:38,412 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:38,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676080815] [2022-01-31 19:13:38,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676080815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:38,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:38,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 19:13:38,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364430324] [2022-01-31 19:13:38,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:38,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 19:13:38,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 19:13:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:13:38,414 INFO L87 Difference]: Start difference. First operand 670 states and 835 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:43,053 INFO L93 Difference]: Finished difference Result 1184 states and 1520 transitions. [2022-01-31 19:13:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:13:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 665 [2022-01-31 19:13:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:43,054 INFO L225 Difference]: With dead ends: 1184 [2022-01-31 19:13:43,054 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 19:13:43,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 19:13:43,056 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2673 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2674 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:43,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2674 Valid, 38 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 19:13:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 678. [2022-01-31 19:13:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 672 states have (on average 1.25) internal successors, (840), 672 states have internal predecessors, (840), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 845 transitions. [2022-01-31 19:13:43,291 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 845 transitions. Word has length 665 [2022-01-31 19:13:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:43,291 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 845 transitions. [2022-01-31 19:13:43,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 845 transitions. [2022-01-31 19:13:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2022-01-31 19:13:43,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:43,295 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:43,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:13:43,295 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1729970765, now seen corresponding path program 82 times [2022-01-31 19:13:43,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:43,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697490913] [2022-01-31 19:13:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:43,297 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:43,297 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:43,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:43,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:45,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:13:45,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:45,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697490913] [2022-01-31 19:13:45,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697490913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:45,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 19:13:45,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952638614] [2022-01-31 19:13:45,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:45,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 19:13:45,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 19:13:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:13:45,843 INFO L87 Difference]: Start difference. First operand 678 states and 845 transitions. Second operand has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 85 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:50,777 INFO L93 Difference]: Finished difference Result 1198 states and 1538 transitions. [2022-01-31 19:13:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:13:50,778 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 85 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 673 [2022-01-31 19:13:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:50,779 INFO L225 Difference]: With dead ends: 1198 [2022-01-31 19:13:50,779 INFO L226 Difference]: Without dead ends: 691 [2022-01-31 19:13:50,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 19:13:50,780 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3047 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3048 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:50,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3048 Valid, 43 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:13:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-31 19:13:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 686. [2022-01-31 19:13:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 680 states have (on average 1.25) internal successors, (850), 680 states have internal predecessors, (850), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 855 transitions. [2022-01-31 19:13:50,992 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 855 transitions. Word has length 673 [2022-01-31 19:13:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 855 transitions. [2022-01-31 19:13:50,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.127906976744186) internal successors, (183), 85 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 855 transitions. [2022-01-31 19:13:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-01-31 19:13:50,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:50,996 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:50,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:13:50,996 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1647767282, now seen corresponding path program 83 times [2022-01-31 19:13:50,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:50,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813399656] [2022-01-31 19:13:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:50,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:50,998 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:50,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:51,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:13:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:13:53,656 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 19:13:53,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:13:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813399656] [2022-01-31 19:13:53,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1813399656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:13:53,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:13:53,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 19:13:53,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027256966] [2022-01-31 19:13:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:13:53,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 19:13:53,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:13:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 19:13:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:13:53,658 INFO L87 Difference]: Start difference. First operand 686 states and 855 transitions. Second operand has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 86 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:13:58,610 INFO L93 Difference]: Finished difference Result 1212 states and 1556 transitions. [2022-01-31 19:13:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 19:13:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 86 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 681 [2022-01-31 19:13:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:13:58,612 INFO L225 Difference]: With dead ends: 1212 [2022-01-31 19:13:58,612 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 19:13:58,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 19:13:58,613 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2485 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2486 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:13:58,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2486 Valid, 38 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:13:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 19:13:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 694. [2022-01-31 19:13:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 688 states have (on average 1.25) internal successors, (860), 688 states have internal predecessors, (860), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:13:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 865 transitions. [2022-01-31 19:13:58,860 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 865 transitions. Word has length 681 [2022-01-31 19:13:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:13:58,861 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 865 transitions. [2022-01-31 19:13:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.1264367816091956) internal successors, (185), 86 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:13:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 865 transitions. [2022-01-31 19:13:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-01-31 19:13:58,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:13:58,865 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:13:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:13:58,866 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:13:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:13:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash 941589609, now seen corresponding path program 84 times [2022-01-31 19:13:58,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:13:58,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755992032] [2022-01-31 19:13:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:13:58,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:13:58,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:13:58,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:13:58,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:13:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:01,577 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:01,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755992032] [2022-01-31 19:14:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755992032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:01,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:01,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 19:14:01,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675214659] [2022-01-31 19:14:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:01,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 19:14:01,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 19:14:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:14:01,580 INFO L87 Difference]: Start difference. First operand 694 states and 865 transitions. Second operand has 88 states, 88 states have (on average 2.125) internal successors, (187), 87 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:06,628 INFO L93 Difference]: Finished difference Result 1226 states and 1574 transitions. [2022-01-31 19:14:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 19:14:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 87 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 689 [2022-01-31 19:14:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:06,630 INFO L225 Difference]: With dead ends: 1226 [2022-01-31 19:14:06,630 INFO L226 Difference]: Without dead ends: 707 [2022-01-31 19:14:06,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 19:14:06,632 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2871 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2872 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:06,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2872 Valid, 33 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:14:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-31 19:14:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 702. [2022-01-31 19:14:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.25) internal successors, (870), 696 states have internal predecessors, (870), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 875 transitions. [2022-01-31 19:14:06,883 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 875 transitions. Word has length 689 [2022-01-31 19:14:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:06,883 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 875 transitions. [2022-01-31 19:14:06,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.125) internal successors, (187), 87 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 875 transitions. [2022-01-31 19:14:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2022-01-31 19:14:06,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:06,887 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:06,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:14:06,887 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2040843982, now seen corresponding path program 85 times [2022-01-31 19:14:06,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:06,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178800061] [2022-01-31 19:14:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:06,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:06,889 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:06,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:09,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:09,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178800061] [2022-01-31 19:14:09,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1178800061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:09,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:09,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 19:14:09,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255420002] [2022-01-31 19:14:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 19:14:09,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 19:14:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 19:14:09,636 INFO L87 Difference]: Start difference. First operand 702 states and 875 transitions. Second operand has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 88 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:14,906 INFO L93 Difference]: Finished difference Result 1240 states and 1592 transitions. [2022-01-31 19:14:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:14:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 88 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 697 [2022-01-31 19:14:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:14,907 INFO L225 Difference]: With dead ends: 1240 [2022-01-31 19:14:14,907 INFO L226 Difference]: Without dead ends: 715 [2022-01-31 19:14:14,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 19:14:14,909 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2507 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2508 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:14,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2508 Valid, 53 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:14:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-31 19:14:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 710. [2022-01-31 19:14:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 704 states have (on average 1.25) internal successors, (880), 704 states have internal predecessors, (880), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 885 transitions. [2022-01-31 19:14:15,135 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 885 transitions. Word has length 697 [2022-01-31 19:14:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:15,135 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 885 transitions. [2022-01-31 19:14:15,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 88 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 885 transitions. [2022-01-31 19:14:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2022-01-31 19:14:15,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:15,139 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:15,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:14:15,139 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash -245039995, now seen corresponding path program 86 times [2022-01-31 19:14:15,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:15,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146889237] [2022-01-31 19:14:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:15,141 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:15,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:15,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:15,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:18,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:18,043 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146889237] [2022-01-31 19:14:18,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146889237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:18,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:18,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:14:18,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911345616] [2022-01-31 19:14:18,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:18,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:14:18,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:14:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:14:18,045 INFO L87 Difference]: Start difference. First operand 710 states and 885 transitions. Second operand has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 89 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:23,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:23,755 INFO L93 Difference]: Finished difference Result 1254 states and 1610 transitions. [2022-01-31 19:14:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 19:14:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 89 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 705 [2022-01-31 19:14:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:23,756 INFO L225 Difference]: With dead ends: 1254 [2022-01-31 19:14:23,757 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 19:14:23,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 19:14:23,758 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3169 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:23,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3170 Valid, 38 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:14:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 19:14:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 718. [2022-01-31 19:14:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 712 states have (on average 1.25) internal successors, (890), 712 states have internal predecessors, (890), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 895 transitions. [2022-01-31 19:14:24,010 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 895 transitions. Word has length 705 [2022-01-31 19:14:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 895 transitions. [2022-01-31 19:14:24,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 89 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 895 transitions. [2022-01-31 19:14:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2022-01-31 19:14:24,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:24,014 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:24,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:14:24,014 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:24,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:24,014 INFO L85 PathProgramCache]: Analyzing trace with hash -506768214, now seen corresponding path program 87 times [2022-01-31 19:14:24,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:24,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173443210] [2022-01-31 19:14:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:24,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:24,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:24,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:24,081 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:26,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:26,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:26,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173443210] [2022-01-31 19:14:26,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173443210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:26,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:26,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 19:14:26,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126318693] [2022-01-31 19:14:26,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:26,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 19:14:26,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 19:14:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:14:26,965 INFO L87 Difference]: Start difference. First operand 718 states and 895 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 90 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:32,561 INFO L93 Difference]: Finished difference Result 1268 states and 1628 transitions. [2022-01-31 19:14:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 19:14:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 90 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 713 [2022-01-31 19:14:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:32,576 INFO L225 Difference]: With dead ends: 1268 [2022-01-31 19:14:32,576 INFO L226 Difference]: Without dead ends: 731 [2022-01-31 19:14:32,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 19:14:32,578 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2673 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2674 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:32,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2674 Valid, 48 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:14:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-31 19:14:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 726. [2022-01-31 19:14:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 720 states have (on average 1.25) internal successors, (900), 720 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 905 transitions. [2022-01-31 19:14:32,867 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 905 transitions. Word has length 713 [2022-01-31 19:14:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:32,867 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 905 transitions. [2022-01-31 19:14:32,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 90 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 905 transitions. [2022-01-31 19:14:32,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2022-01-31 19:14:32,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:32,871 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:32,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:14:32,871 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:32,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1803375967, now seen corresponding path program 88 times [2022-01-31 19:14:32,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:32,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484053008] [2022-01-31 19:14:32,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:32,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:32,873 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:32,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:32,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:35,852 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:35,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484053008] [2022-01-31 19:14:35,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [484053008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:35,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:35,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:14:35,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543501037] [2022-01-31 19:14:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:35,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:14:35,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:14:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:14:35,855 INFO L87 Difference]: Start difference. First operand 726 states and 905 transitions. Second operand has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 91 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:42,318 INFO L93 Difference]: Finished difference Result 1282 states and 1646 transitions. [2022-01-31 19:14:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:14:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 91 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 721 [2022-01-31 19:14:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:42,320 INFO L225 Difference]: With dead ends: 1282 [2022-01-31 19:14:42,320 INFO L226 Difference]: Without dead ends: 739 [2022-01-31 19:14:42,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 19:14:42,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2747 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 945 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2748 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 945 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:42,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2748 Valid, 43 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [945 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:14:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-31 19:14:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 734. [2022-01-31 19:14:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 728 states have (on average 1.25) internal successors, (910), 728 states have internal predecessors, (910), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 915 transitions. [2022-01-31 19:14:42,600 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 915 transitions. Word has length 721 [2022-01-31 19:14:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:42,601 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 915 transitions. [2022-01-31 19:14:42,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.119565217391304) internal successors, (195), 91 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 915 transitions. [2022-01-31 19:14:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2022-01-31 19:14:42,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:42,605 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:42,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:14:42,605 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2118877318, now seen corresponding path program 89 times [2022-01-31 19:14:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503675990] [2022-01-31 19:14:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:42,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:42,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:42,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:42,640 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:46,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:46,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:46,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503675990] [2022-01-31 19:14:46,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503675990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:46,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:46,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 19:14:46,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996782917] [2022-01-31 19:14:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:46,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 19:14:46,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 19:14:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:14:46,129 INFO L87 Difference]: Start difference. First operand 734 states and 915 transitions. Second operand has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 92 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:14:52,371 INFO L93 Difference]: Finished difference Result 1296 states and 1664 transitions. [2022-01-31 19:14:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 19:14:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 92 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 729 [2022-01-31 19:14:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:14:52,373 INFO L225 Difference]: With dead ends: 1296 [2022-01-31 19:14:52,373 INFO L226 Difference]: Without dead ends: 747 [2022-01-31 19:14:52,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 19:14:52,375 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2707 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 931 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2708 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 931 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:14:52,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2708 Valid, 53 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [931 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:14:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-31 19:14:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 742. [2022-01-31 19:14:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 736 states have (on average 1.25) internal successors, (920), 736 states have internal predecessors, (920), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:14:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 925 transitions. [2022-01-31 19:14:52,807 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 925 transitions. Word has length 729 [2022-01-31 19:14:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:14:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 925 transitions. [2022-01-31 19:14:52,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.118279569892473) internal successors, (197), 92 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:14:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 925 transitions. [2022-01-31 19:14:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2022-01-31 19:14:52,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:14:52,815 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:14:52,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:14:52,815 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:14:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:14:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1626501443, now seen corresponding path program 90 times [2022-01-31 19:14:52,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:14:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262369502] [2022-01-31 19:14:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:14:52,818 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:14:52,818 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:14:52,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:14:52,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:14:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:14:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:14:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:14:56,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:14:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262369502] [2022-01-31 19:14:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [262369502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:14:56,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:14:56,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 19:14:56,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994110521] [2022-01-31 19:14:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:14:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 19:14:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:14:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 19:14:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:14:56,024 INFO L87 Difference]: Start difference. First operand 742 states and 925 transitions. Second operand has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 93 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:02,806 INFO L93 Difference]: Finished difference Result 1310 states and 1682 transitions. [2022-01-31 19:15:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 19:15:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 93 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 737 [2022-01-31 19:15:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:02,807 INFO L225 Difference]: With dead ends: 1310 [2022-01-31 19:15:02,807 INFO L226 Difference]: Without dead ends: 755 [2022-01-31 19:15:02,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 19:15:02,809 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3063 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:02,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 33 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:15:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-31 19:15:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 750. [2022-01-31 19:15:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 744 states have (on average 1.25) internal successors, (930), 744 states have internal predecessors, (930), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 935 transitions. [2022-01-31 19:15:03,061 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 935 transitions. Word has length 737 [2022-01-31 19:15:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:03,061 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 935 transitions. [2022-01-31 19:15:03,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.117021276595745) internal successors, (199), 93 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 935 transitions. [2022-01-31 19:15:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2022-01-31 19:15:03,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:03,065 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:15:03,066 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 633754210, now seen corresponding path program 91 times [2022-01-31 19:15:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128961672] [2022-01-31 19:15:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:03,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:03,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:03,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:03,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:06,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:06,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128961672] [2022-01-31 19:15:06,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128961672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:06,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:06,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 19:15:06,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098412272] [2022-01-31 19:15:06,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:06,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 19:15:06,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 19:15:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 19:15:06,344 INFO L87 Difference]: Start difference. First operand 750 states and 935 transitions. Second operand has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 94 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:13,349 INFO L93 Difference]: Finished difference Result 1324 states and 1700 transitions. [2022-01-31 19:15:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:15:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 94 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 745 [2022-01-31 19:15:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:13,350 INFO L225 Difference]: With dead ends: 1324 [2022-01-31 19:15:13,350 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 19:15:13,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 19:15:13,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 1073 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1073 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:13,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3126 Valid, 48 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1073 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:15:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 19:15:13,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 758. [2022-01-31 19:15:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 752 states have (on average 1.25) internal successors, (940), 752 states have internal predecessors, (940), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 945 transitions. [2022-01-31 19:15:13,613 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 945 transitions. Word has length 745 [2022-01-31 19:15:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:13,613 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 945 transitions. [2022-01-31 19:15:13,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1157894736842104) internal successors, (201), 94 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 945 transitions. [2022-01-31 19:15:13,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2022-01-31 19:15:13,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:13,617 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:13,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:15:13,617 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:13,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1788520665, now seen corresponding path program 92 times [2022-01-31 19:15:13,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:13,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422918340] [2022-01-31 19:15:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:13,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:13,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:13,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:13,663 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:16,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422918340] [2022-01-31 19:15:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422918340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:16,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:16,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 19:15:16,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261171749] [2022-01-31 19:15:16,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:16,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 19:15:16,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 19:15:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:15:16,881 INFO L87 Difference]: Start difference. First operand 758 states and 945 transitions. Second operand has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 95 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:23,292 INFO L93 Difference]: Finished difference Result 1338 states and 1718 transitions. [2022-01-31 19:15:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 19:15:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 95 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 753 [2022-01-31 19:15:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:23,294 INFO L225 Difference]: With dead ends: 1338 [2022-01-31 19:15:23,294 INFO L226 Difference]: Without dead ends: 771 [2022-01-31 19:15:23,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 19:15:23,295 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3325 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 1139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3326 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1139 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:23,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3326 Valid, 38 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1139 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:15:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-31 19:15:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 766. [2022-01-31 19:15:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 760 states have (on average 1.25) internal successors, (950), 760 states have internal predecessors, (950), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 955 transitions. [2022-01-31 19:15:23,571 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 955 transitions. Word has length 753 [2022-01-31 19:15:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:23,572 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 955 transitions. [2022-01-31 19:15:23,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 95 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 955 transitions. [2022-01-31 19:15:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-01-31 19:15:23,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:23,576 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:23,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:15:23,576 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1042494914, now seen corresponding path program 93 times [2022-01-31 19:15:23,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:23,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173273507] [2022-01-31 19:15:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:23,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:23,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:23,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:23,624 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:26,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:26,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173273507] [2022-01-31 19:15:26,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [173273507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:26,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:26,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:15:26,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974088242] [2022-01-31 19:15:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:26,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:15:26,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:15:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:15:26,786 INFO L87 Difference]: Start difference. First operand 766 states and 955 transitions. Second operand has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 96 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:33,443 INFO L93 Difference]: Finished difference Result 1352 states and 1736 transitions. [2022-01-31 19:15:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 19:15:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 96 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 761 [2022-01-31 19:15:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:33,445 INFO L225 Difference]: With dead ends: 1352 [2022-01-31 19:15:33,445 INFO L226 Difference]: Without dead ends: 779 [2022-01-31 19:15:33,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 19:15:33,447 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3189 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 1096 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3190 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1096 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:33,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3190 Valid, 58 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1096 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:15:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-31 19:15:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 774. [2022-01-31 19:15:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 768 states have (on average 1.25) internal successors, (960), 768 states have internal predecessors, (960), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 965 transitions. [2022-01-31 19:15:33,714 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 965 transitions. Word has length 761 [2022-01-31 19:15:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:33,714 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 965 transitions. [2022-01-31 19:15:33,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.11340206185567) internal successors, (205), 96 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 965 transitions. [2022-01-31 19:15:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2022-01-31 19:15:33,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:33,719 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:33,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 19:15:33,719 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1933641483, now seen corresponding path program 94 times [2022-01-31 19:15:33,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:33,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881391360] [2022-01-31 19:15:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:33,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:33,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:33,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:33,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:37,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881391360] [2022-01-31 19:15:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881391360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:37,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 19:15:37,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896982993] [2022-01-31 19:15:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 19:15:37,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 19:15:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 19:15:37,052 INFO L87 Difference]: Start difference. First operand 774 states and 965 transitions. Second operand has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 97 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:43,407 INFO L93 Difference]: Finished difference Result 1366 states and 1754 transitions. [2022-01-31 19:15:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:15:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 97 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 769 [2022-01-31 19:15:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:43,409 INFO L225 Difference]: With dead ends: 1366 [2022-01-31 19:15:43,409 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 19:15:43,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 19:15:43,411 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3347 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 1146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3348 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:43,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3348 Valid, 53 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1146 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:15:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 19:15:43,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 782. [2022-01-31 19:15:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 776 states have (on average 1.25) internal successors, (970), 776 states have internal predecessors, (970), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 975 transitions. [2022-01-31 19:15:43,738 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 975 transitions. Word has length 769 [2022-01-31 19:15:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:43,739 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 975 transitions. [2022-01-31 19:15:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 97 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 975 transitions. [2022-01-31 19:15:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2022-01-31 19:15:43,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:43,744 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 19:15:43,744 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1865410586, now seen corresponding path program 95 times [2022-01-31 19:15:43,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900683314] [2022-01-31 19:15:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:43,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:43,746 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:43,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:43,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:47,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:47,087 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900683314] [2022-01-31 19:15:47,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [900683314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:47,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:47,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 19:15:47,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738549852] [2022-01-31 19:15:47,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 19:15:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 19:15:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:15:47,090 INFO L87 Difference]: Start difference. First operand 782 states and 975 transitions. Second operand has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 98 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:15:53,900 INFO L93 Difference]: Finished difference Result 1380 states and 1772 transitions. [2022-01-31 19:15:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 19:15:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 98 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 777 [2022-01-31 19:15:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:15:53,902 INFO L225 Difference]: With dead ends: 1380 [2022-01-31 19:15:53,902 INFO L226 Difference]: Without dead ends: 795 [2022-01-31 19:15:53,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 19:15:53,904 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3139 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3140 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:15:53,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3140 Valid, 48 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1082 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:15:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-31 19:15:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 790. [2022-01-31 19:15:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 784 states have (on average 1.25) internal successors, (980), 784 states have internal predecessors, (980), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:15:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 985 transitions. [2022-01-31 19:15:54,199 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 985 transitions. Word has length 777 [2022-01-31 19:15:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:15:54,199 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 985 transitions. [2022-01-31 19:15:54,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.111111111111111) internal successors, (209), 98 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:15:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 985 transitions. [2022-01-31 19:15:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-01-31 19:15:54,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:15:54,204 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:15:54,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 19:15:54,204 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:15:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:15:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 923762449, now seen corresponding path program 96 times [2022-01-31 19:15:54,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:15:54,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020504966] [2022-01-31 19:15:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:15:54,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:15:54,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:15:54,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:15:54,252 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:15:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:15:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:15:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:15:57,730 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:15:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020504966] [2022-01-31 19:15:57,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020504966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:15:57,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:15:57,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 19:15:57,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298495441] [2022-01-31 19:15:57,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:15:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 19:15:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:15:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 19:15:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:15:57,733 INFO L87 Difference]: Start difference. First operand 790 states and 985 transitions. Second operand has 100 states, 100 states have (on average 2.11) internal successors, (211), 99 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:04,753 INFO L93 Difference]: Finished difference Result 1394 states and 1790 transitions. [2022-01-31 19:16:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 19:16:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.11) internal successors, (211), 99 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 785 [2022-01-31 19:16:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:04,755 INFO L225 Difference]: With dead ends: 1394 [2022-01-31 19:16:04,755 INFO L226 Difference]: Without dead ends: 803 [2022-01-31 19:16:04,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 19:16:04,757 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3051 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3052 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:04,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3052 Valid, 53 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:16:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-31 19:16:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 798. [2022-01-31 19:16:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 792 states have (on average 1.25) internal successors, (990), 792 states have internal predecessors, (990), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 995 transitions. [2022-01-31 19:16:05,097 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 995 transitions. Word has length 785 [2022-01-31 19:16:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:05,097 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 995 transitions. [2022-01-31 19:16:05,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.11) internal successors, (211), 99 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 995 transitions. [2022-01-31 19:16:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2022-01-31 19:16:05,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:05,102 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:05,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 19:16:05,102 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1654608906, now seen corresponding path program 97 times [2022-01-31 19:16:05,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802157610] [2022-01-31 19:16:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:05,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:05,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:05,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:05,157 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:08,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:08,625 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 19:16:08,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802157610] [2022-01-31 19:16:08,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802157610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:08,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:08,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 19:16:08,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928089871] [2022-01-31 19:16:08,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:08,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 19:16:08,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 19:16:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 19:16:08,628 INFO L87 Difference]: Start difference. First operand 798 states and 995 transitions. Second operand has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 100 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:15,590 INFO L93 Difference]: Finished difference Result 1408 states and 1808 transitions. [2022-01-31 19:16:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 19:16:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 100 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 793 [2022-01-31 19:16:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:15,592 INFO L225 Difference]: With dead ends: 1408 [2022-01-31 19:16:15,592 INFO L226 Difference]: Without dead ends: 811 [2022-01-31 19:16:15,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:16:15,594 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3005 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3006 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:15,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3006 Valid, 43 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1035 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:16:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-31 19:16:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 806. [2022-01-31 19:16:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 800 states have (on average 1.25) internal successors, (1000), 800 states have internal predecessors, (1000), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1005 transitions. [2022-01-31 19:16:15,935 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1005 transitions. Word has length 793 [2022-01-31 19:16:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:15,935 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1005 transitions. [2022-01-31 19:16:15,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.108910891089109) internal successors, (213), 100 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1005 transitions. [2022-01-31 19:16:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2022-01-31 19:16:15,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:15,941 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:15,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 19:16:15,941 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1759429843, now seen corresponding path program 98 times [2022-01-31 19:16:15,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:15,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516374210] [2022-01-31 19:16:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:15,944 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:15,944 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:15,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:15,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:19,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516374210] [2022-01-31 19:16:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516374210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:19,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:16:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988732756] [2022-01-31 19:16:19,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:19,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:16:19,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:16:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:16:19,513 INFO L87 Difference]: Start difference. First operand 806 states and 1005 transitions. Second operand has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:26,831 INFO L93 Difference]: Finished difference Result 1422 states and 1826 transitions. [2022-01-31 19:16:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 19:16:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 801 [2022-01-31 19:16:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:26,833 INFO L225 Difference]: With dead ends: 1422 [2022-01-31 19:16:26,833 INFO L226 Difference]: Without dead ends: 819 [2022-01-31 19:16:26,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:16:26,835 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3433 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 1176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1176 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:26,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3434 Valid, 48 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1176 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:16:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-31 19:16:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 814. [2022-01-31 19:16:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 808 states have (on average 1.25) internal successors, (1010), 808 states have internal predecessors, (1010), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1015 transitions. [2022-01-31 19:16:27,131 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1015 transitions. Word has length 801 [2022-01-31 19:16:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:27,131 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1015 transitions. [2022-01-31 19:16:27,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1015 transitions. [2022-01-31 19:16:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2022-01-31 19:16:27,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:27,136 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:27,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 19:16:27,137 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash 789583314, now seen corresponding path program 99 times [2022-01-31 19:16:27,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488347674] [2022-01-31 19:16:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:27,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:27,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:27,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:27,194 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:30,821 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 19:16:30,821 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488347674] [2022-01-31 19:16:30,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [488347674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:30,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:30,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 19:16:30,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288118391] [2022-01-31 19:16:30,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:30,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 19:16:30,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 19:16:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 19:16:30,824 INFO L87 Difference]: Start difference. First operand 814 states and 1015 transitions. Second operand has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 102 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:38,350 INFO L93 Difference]: Finished difference Result 1436 states and 1844 transitions. [2022-01-31 19:16:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 19:16:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 102 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 809 [2022-01-31 19:16:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:38,352 INFO L225 Difference]: With dead ends: 1436 [2022-01-31 19:16:38,352 INFO L226 Difference]: Without dead ends: 827 [2022-01-31 19:16:38,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 19:16:38,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3285 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3286 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:38,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3286 Valid, 53 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:16:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-31 19:16:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 822. [2022-01-31 19:16:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 816 states have (on average 1.25) internal successors, (1020), 816 states have internal predecessors, (1020), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1025 transitions. [2022-01-31 19:16:38,658 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1025 transitions. Word has length 809 [2022-01-31 19:16:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:38,659 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1025 transitions. [2022-01-31 19:16:38,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 102 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1025 transitions. [2022-01-31 19:16:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2022-01-31 19:16:38,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:38,663 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:38,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 19:16:38,663 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 914959689, now seen corresponding path program 100 times [2022-01-31 19:16:38,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868957642] [2022-01-31 19:16:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:38,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:38,666 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:38,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:38,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:42,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:42,403 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868957642] [2022-01-31 19:16:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [868957642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:42,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 19:16:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433259170] [2022-01-31 19:16:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 19:16:42,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 19:16:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:16:42,406 INFO L87 Difference]: Start difference. First operand 822 states and 1025 transitions. Second operand has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 103 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:16:50,002 INFO L93 Difference]: Finished difference Result 1450 states and 1862 transitions. [2022-01-31 19:16:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:16:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 103 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 817 [2022-01-31 19:16:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:16:50,004 INFO L225 Difference]: With dead ends: 1450 [2022-01-31 19:16:50,004 INFO L226 Difference]: Without dead ends: 835 [2022-01-31 19:16:50,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 19:16:50,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3623 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 1242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3624 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1242 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:16:50,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3624 Valid, 38 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1242 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:16:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-31 19:16:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 830. [2022-01-31 19:16:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 824 states have (on average 1.25) internal successors, (1030), 824 states have internal predecessors, (1030), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:16:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1035 transitions. [2022-01-31 19:16:50,366 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1035 transitions. Word has length 817 [2022-01-31 19:16:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:16:50,366 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1035 transitions. [2022-01-31 19:16:50,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.105769230769231) internal successors, (219), 103 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:16:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1035 transitions. [2022-01-31 19:16:50,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2022-01-31 19:16:50,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:16:50,371 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:16:50,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 19:16:50,372 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:16:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:16:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1713429074, now seen corresponding path program 101 times [2022-01-31 19:16:50,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:16:50,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813291867] [2022-01-31 19:16:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:16:50,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:16:50,374 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:16:50,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:16:50,426 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:16:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:16:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:16:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:16:54,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:16:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813291867] [2022-01-31 19:16:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [813291867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:16:54,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:16:54,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 19:16:54,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589090017] [2022-01-31 19:16:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:16:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 19:16:54,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:16:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 19:16:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 19:16:54,153 INFO L87 Difference]: Start difference. First operand 830 states and 1035 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 104 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:01,803 INFO L93 Difference]: Finished difference Result 1464 states and 1880 transitions. [2022-01-31 19:17:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 19:17:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 104 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 825 [2022-01-31 19:17:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:01,805 INFO L225 Difference]: With dead ends: 1464 [2022-01-31 19:17:01,805 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 19:17:01,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 19:17:01,807 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3253 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 1120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3254 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:01,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3254 Valid, 48 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1120 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:17:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 19:17:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 838. [2022-01-31 19:17:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 832 states have (on average 1.25) internal successors, (1040), 832 states have internal predecessors, (1040), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1045 transitions. [2022-01-31 19:17:02,140 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1045 transitions. Word has length 825 [2022-01-31 19:17:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:02,140 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1045 transitions. [2022-01-31 19:17:02,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 104 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1045 transitions. [2022-01-31 19:17:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2022-01-31 19:17:02,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:02,145 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:02,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 19:17:02,145 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1524389221, now seen corresponding path program 102 times [2022-01-31 19:17:02,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:02,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624445934] [2022-01-31 19:17:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:02,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:02,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:02,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:02,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:06,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:06,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624445934] [2022-01-31 19:17:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624445934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:06,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:06,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 19:17:06,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840635849] [2022-01-31 19:17:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:06,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 19:17:06,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 19:17:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 19:17:06,246 INFO L87 Difference]: Start difference. First operand 838 states and 1045 transitions. Second operand has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 105 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:13,856 INFO L93 Difference]: Finished difference Result 1478 states and 1898 transitions. [2022-01-31 19:17:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 19:17:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 105 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 833 [2022-01-31 19:17:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:13,858 INFO L225 Difference]: With dead ends: 1478 [2022-01-31 19:17:13,858 INFO L226 Difference]: Without dead ends: 851 [2022-01-31 19:17:13,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 19:17:13,861 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3735 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3736 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:13,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3736 Valid, 38 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:17:13,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-01-31 19:17:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 846. [2022-01-31 19:17:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 840 states have (on average 1.25) internal successors, (1050), 840 states have internal predecessors, (1050), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1055 transitions. [2022-01-31 19:17:14,291 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1055 transitions. Word has length 833 [2022-01-31 19:17:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:14,291 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1055 transitions. [2022-01-31 19:17:14,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 105 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1055 transitions. [2022-01-31 19:17:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2022-01-31 19:17:14,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:14,296 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 19:17:14,296 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 107928458, now seen corresponding path program 103 times [2022-01-31 19:17:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985941397] [2022-01-31 19:17:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:14,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:14,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:14,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:14,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:18,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:18,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:18,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985941397] [2022-01-31 19:17:18,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985941397] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:18,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:18,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 19:17:18,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240945036] [2022-01-31 19:17:18,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:18,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 19:17:18,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:18,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 19:17:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 19:17:18,276 INFO L87 Difference]: Start difference. First operand 846 states and 1055 transitions. Second operand has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 106 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:26,123 INFO L93 Difference]: Finished difference Result 1492 states and 1916 transitions. [2022-01-31 19:17:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 19:17:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 106 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 841 [2022-01-31 19:17:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:26,125 INFO L225 Difference]: With dead ends: 1492 [2022-01-31 19:17:26,125 INFO L226 Difference]: Without dead ends: 859 [2022-01-31 19:17:26,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 19:17:26,127 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3431 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:26,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3432 Valid, 43 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1177 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:17:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-31 19:17:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 854. [2022-01-31 19:17:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 848 states have (on average 1.25) internal successors, (1060), 848 states have internal predecessors, (1060), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1065 transitions. [2022-01-31 19:17:26,499 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1065 transitions. Word has length 841 [2022-01-31 19:17:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:26,499 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1065 transitions. [2022-01-31 19:17:26,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 106 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1065 transitions. [2022-01-31 19:17:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2022-01-31 19:17:26,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:26,504 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:26,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 19:17:26,504 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1706013569, now seen corresponding path program 104 times [2022-01-31 19:17:26,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:26,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369828194] [2022-01-31 19:17:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:26,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:26,506 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:26,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:26,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:30,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:30,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369828194] [2022-01-31 19:17:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [369828194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:30,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 19:17:30,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275806478] [2022-01-31 19:17:30,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:30,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 19:17:30,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 19:17:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:17:30,567 INFO L87 Difference]: Start difference. First operand 854 states and 1065 transitions. Second operand has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 107 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:38,695 INFO L93 Difference]: Finished difference Result 1506 states and 1934 transitions. [2022-01-31 19:17:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 19:17:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 107 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 849 [2022-01-31 19:17:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:38,697 INFO L225 Difference]: With dead ends: 1506 [2022-01-31 19:17:38,697 INFO L226 Difference]: Without dead ends: 867 [2022-01-31 19:17:38,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 19:17:38,699 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3367 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3368 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:38,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3368 Valid, 48 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:17:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-31 19:17:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 862. [2022-01-31 19:17:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 856 states have (on average 1.25) internal successors, (1070), 856 states have internal predecessors, (1070), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1075 transitions. [2022-01-31 19:17:39,071 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1075 transitions. Word has length 849 [2022-01-31 19:17:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:39,071 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1075 transitions. [2022-01-31 19:17:39,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1018518518518516) internal successors, (227), 107 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1075 transitions. [2022-01-31 19:17:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 858 [2022-01-31 19:17:39,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:39,076 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:39,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 19:17:39,076 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1885353830, now seen corresponding path program 105 times [2022-01-31 19:17:39,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201517901] [2022-01-31 19:17:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:39,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:39,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:39,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:39,139 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:43,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:43,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201517901] [2022-01-31 19:17:43,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [201517901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:43,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:43,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 19:17:43,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383509043] [2022-01-31 19:17:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:43,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 19:17:43,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 19:17:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 19:17:43,203 INFO L87 Difference]: Start difference. First operand 862 states and 1075 transitions. Second operand has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 108 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:17:51,655 INFO L93 Difference]: Finished difference Result 1520 states and 1952 transitions. [2022-01-31 19:17:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 19:17:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 108 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 857 [2022-01-31 19:17:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:17:51,656 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 19:17:51,656 INFO L226 Difference]: Without dead ends: 875 [2022-01-31 19:17:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 19:17:51,659 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3567 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 1225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1225 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:17:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3568 Valid, 48 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1225 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:17:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-31 19:17:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 870. [2022-01-31 19:17:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 864 states have (on average 1.25) internal successors, (1080), 864 states have internal predecessors, (1080), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:17:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1085 transitions. [2022-01-31 19:17:52,041 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1085 transitions. Word has length 857 [2022-01-31 19:17:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:17:52,041 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1085 transitions. [2022-01-31 19:17:52,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 108 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:17:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1085 transitions. [2022-01-31 19:17:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2022-01-31 19:17:52,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:17:52,046 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:17:52,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 19:17:52,046 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:17:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:17:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash 882395037, now seen corresponding path program 106 times [2022-01-31 19:17:52,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:17:52,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261467041] [2022-01-31 19:17:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:17:52,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:17:52,048 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:17:52,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:17:52,108 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:17:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:56,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:17:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:17:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:17:56,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:17:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261467041] [2022-01-31 19:17:56,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261467041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:17:56,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:17:56,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 19:17:56,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266752242] [2022-01-31 19:17:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:17:56,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 19:17:56,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:17:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 19:17:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:17:56,528 INFO L87 Difference]: Start difference. First operand 870 states and 1085 transitions. Second operand has 110 states, 110 states have (on average 2.1) internal successors, (231), 109 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:05,121 INFO L93 Difference]: Finished difference Result 1534 states and 1970 transitions. [2022-01-31 19:18:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 19:18:05,121 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.1) internal successors, (231), 109 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 865 [2022-01-31 19:18:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:05,123 INFO L225 Difference]: With dead ends: 1534 [2022-01-31 19:18:05,123 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 19:18:05,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 19:18:05,126 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3593 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 1232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3594 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1232 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:05,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3594 Valid, 38 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1232 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:18:05,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 19:18:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 878. [2022-01-31 19:18:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 872 states have (on average 1.25) internal successors, (1090), 872 states have internal predecessors, (1090), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1095 transitions. [2022-01-31 19:18:05,617 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1095 transitions. Word has length 865 [2022-01-31 19:18:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1095 transitions. [2022-01-31 19:18:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.1) internal successors, (231), 109 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1095 transitions. [2022-01-31 19:18:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2022-01-31 19:18:05,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:05,623 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:05,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 19:18:05,623 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -967558846, now seen corresponding path program 107 times [2022-01-31 19:18:05,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:05,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888902378] [2022-01-31 19:18:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:05,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:05,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:05,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:05,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:09,988 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:09,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888902378] [2022-01-31 19:18:09,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [888902378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:09,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:09,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 19:18:09,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858423487] [2022-01-31 19:18:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:09,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 19:18:09,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 19:18:09,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:18:09,991 INFO L87 Difference]: Start difference. First operand 878 states and 1095 transitions. Second operand has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 110 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:19,225 INFO L93 Difference]: Finished difference Result 1548 states and 1988 transitions. [2022-01-31 19:18:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 19:18:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 110 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 873 [2022-01-31 19:18:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:19,227 INFO L225 Difference]: With dead ends: 1548 [2022-01-31 19:18:19,227 INFO L226 Difference]: Without dead ends: 891 [2022-01-31 19:18:19,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 19:18:19,229 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3721 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3722 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:19,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3722 Valid, 38 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:18:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-31 19:18:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-01-31 19:18:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 880 states have (on average 1.25) internal successors, (1100), 880 states have internal predecessors, (1100), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1105 transitions. [2022-01-31 19:18:19,608 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1105 transitions. Word has length 873 [2022-01-31 19:18:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:19,608 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1105 transitions. [2022-01-31 19:18:19,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.099099099099099) internal successors, (233), 110 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1105 transitions. [2022-01-31 19:18:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2022-01-31 19:18:19,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:19,614 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:19,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 19:18:19,614 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2127883847, now seen corresponding path program 108 times [2022-01-31 19:18:19,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:19,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470052953] [2022-01-31 19:18:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:19,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:19,615 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:19,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:19,681 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:23,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:23,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:23,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470052953] [2022-01-31 19:18:23,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [470052953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:23,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:23,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 19:18:23,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068997945] [2022-01-31 19:18:23,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:23,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 19:18:23,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 19:18:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:18:23,963 INFO L87 Difference]: Start difference. First operand 886 states and 1105 transitions. Second operand has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 111 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:33,479 INFO L93 Difference]: Finished difference Result 1562 states and 2006 transitions. [2022-01-31 19:18:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 19:18:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 111 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 881 [2022-01-31 19:18:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:33,481 INFO L225 Difference]: With dead ends: 1562 [2022-01-31 19:18:33,481 INFO L226 Difference]: Without dead ends: 899 [2022-01-31 19:18:33,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 19:18:33,483 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3465 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:33,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3466 Valid, 53 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:18:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-31 19:18:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 894. [2022-01-31 19:18:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 888 states have (on average 1.25) internal successors, (1110), 888 states have internal predecessors, (1110), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1115 transitions. [2022-01-31 19:18:33,983 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1115 transitions. Word has length 881 [2022-01-31 19:18:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:33,983 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1115 transitions. [2022-01-31 19:18:33,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 111 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1115 transitions. [2022-01-31 19:18:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2022-01-31 19:18:33,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:33,989 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:33,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 19:18:33,989 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash 166453534, now seen corresponding path program 109 times [2022-01-31 19:18:33,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:33,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254080939] [2022-01-31 19:18:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:33,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:33,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:33,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:34,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:38,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:38,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254080939] [2022-01-31 19:18:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [254080939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:38,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:38,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 19:18:38,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604395500] [2022-01-31 19:18:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:38,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 19:18:38,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 19:18:38,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 19:18:38,718 INFO L87 Difference]: Start difference. First operand 894 states and 1115 transitions. Second operand has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 112 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:18:49,603 INFO L93 Difference]: Finished difference Result 1576 states and 2024 transitions. [2022-01-31 19:18:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:18:49,604 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 112 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 889 [2022-01-31 19:18:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:18:49,606 INFO L225 Difference]: With dead ends: 1576 [2022-01-31 19:18:49,606 INFO L226 Difference]: Without dead ends: 907 [2022-01-31 19:18:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 19:18:49,608 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3725 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3726 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:18:49,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3726 Valid, 48 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:18:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-31 19:18:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 902. [2022-01-31 19:18:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 896 states have (on average 1.25) internal successors, (1120), 896 states have internal predecessors, (1120), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:18:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1125 transitions. [2022-01-31 19:18:50,144 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1125 transitions. Word has length 889 [2022-01-31 19:18:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:18:50,144 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1125 transitions. [2022-01-31 19:18:50,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 112 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:18:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1125 transitions. [2022-01-31 19:18:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-01-31 19:18:50,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:18:50,151 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:18:50,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 19:18:50,151 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:18:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:18:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1090326997, now seen corresponding path program 110 times [2022-01-31 19:18:50,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:18:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063106865] [2022-01-31 19:18:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:18:50,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:18:50,153 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:18:50,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:18:50,238 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:18:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:54,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:18:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:18:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:18:54,817 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:18:54,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063106865] [2022-01-31 19:18:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063106865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:18:54,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:18:54,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 19:18:54,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939384301] [2022-01-31 19:18:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:18:54,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 19:18:54,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:18:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 19:18:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 19:18:54,820 INFO L87 Difference]: Start difference. First operand 902 states and 1125 transitions. Second operand has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 113 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:05,712 INFO L93 Difference]: Finished difference Result 1590 states and 2042 transitions. [2022-01-31 19:19:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 19:19:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 113 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 897 [2022-01-31 19:19:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:05,714 INFO L225 Difference]: With dead ends: 1590 [2022-01-31 19:19:05,714 INFO L226 Difference]: Without dead ends: 915 [2022-01-31 19:19:05,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 19:19:05,719 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3493 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 1204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:05,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3494 Valid, 58 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1204 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:19:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-01-31 19:19:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 910. [2022-01-31 19:19:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 904 states have (on average 1.25) internal successors, (1130), 904 states have internal predecessors, (1130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1135 transitions. [2022-01-31 19:19:06,355 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1135 transitions. Word has length 897 [2022-01-31 19:19:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1135 transitions. [2022-01-31 19:19:06,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 113 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1135 transitions. [2022-01-31 19:19:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2022-01-31 19:19:06,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:06,362 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:06,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 19:19:06,362 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1875390202, now seen corresponding path program 111 times [2022-01-31 19:19:06,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:06,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856696739] [2022-01-31 19:19:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:06,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:06,364 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:06,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:06,461 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:11,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:19:11,492 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856696739] [2022-01-31 19:19:11,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856696739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:11,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:11,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 19:19:11,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412529886] [2022-01-31 19:19:11,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:11,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 19:19:11,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 19:19:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 19:19:11,497 INFO L87 Difference]: Start difference. First operand 910 states and 1135 transitions. Second operand has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 114 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:22,576 INFO L93 Difference]: Finished difference Result 1604 states and 2060 transitions. [2022-01-31 19:19:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 19:19:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 114 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 905 [2022-01-31 19:19:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:22,577 INFO L225 Difference]: With dead ends: 1604 [2022-01-31 19:19:22,577 INFO L226 Difference]: Without dead ends: 923 [2022-01-31 19:19:22,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 19:19:22,582 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3405 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:22,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3406 Valid, 53 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1175 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:19:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-31 19:19:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 918. [2022-01-31 19:19:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.25) internal successors, (1140), 912 states have internal predecessors, (1140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1145 transitions. [2022-01-31 19:19:23,108 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1145 transitions. Word has length 905 [2022-01-31 19:19:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:23,108 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1145 transitions. [2022-01-31 19:19:23,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 114 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1145 transitions. [2022-01-31 19:19:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2022-01-31 19:19:23,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:23,114 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:23,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 19:19:23,114 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 94586865, now seen corresponding path program 112 times [2022-01-31 19:19:23,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920941034] [2022-01-31 19:19:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:23,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:23,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:23,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:23,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:28,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:19:28,018 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:28,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920941034] [2022-01-31 19:19:28,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920941034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:28,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:28,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 19:19:28,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770094232] [2022-01-31 19:19:28,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:28,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 19:19:28,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 19:19:28,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 19:19:28,022 INFO L87 Difference]: Start difference. First operand 918 states and 1145 transitions. Second operand has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 115 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:38,032 INFO L93 Difference]: Finished difference Result 1618 states and 2078 transitions. [2022-01-31 19:19:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 19:19:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 115 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 913 [2022-01-31 19:19:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:38,034 INFO L225 Difference]: With dead ends: 1618 [2022-01-31 19:19:38,034 INFO L226 Difference]: Without dead ends: 931 [2022-01-31 19:19:38,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 19:19:38,036 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3707 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3708 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1273 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:38,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3708 Valid, 58 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1273 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:19:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-31 19:19:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 926. [2022-01-31 19:19:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 920 states have (on average 1.25) internal successors, (1150), 920 states have internal predecessors, (1150), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1155 transitions. [2022-01-31 19:19:38,428 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1155 transitions. Word has length 913 [2022-01-31 19:19:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:38,429 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1155 transitions. [2022-01-31 19:19:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 115 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1155 transitions. [2022-01-31 19:19:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2022-01-31 19:19:38,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:38,434 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:38,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 19:19:38,434 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2139759318, now seen corresponding path program 113 times [2022-01-31 19:19:38,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:38,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331945144] [2022-01-31 19:19:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:38,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:38,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:38,502 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:43,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:43,353 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 19:19:43,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331945144] [2022-01-31 19:19:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331945144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:43,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:43,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 19:19:43,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24812262] [2022-01-31 19:19:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 19:19:43,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 19:19:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:19:43,357 INFO L87 Difference]: Start difference. First operand 926 states and 1155 transitions. Second operand has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:19:53,046 INFO L93 Difference]: Finished difference Result 1632 states and 2096 transitions. [2022-01-31 19:19:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 19:19:53,047 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 921 [2022-01-31 19:19:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:19:53,048 INFO L225 Difference]: With dead ends: 1632 [2022-01-31 19:19:53,048 INFO L226 Difference]: Without dead ends: 939 [2022-01-31 19:19:53,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 19:19:53,050 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4285 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 1464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4286 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:19:53,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4286 Valid, 43 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1464 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:19:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-31 19:19:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 934. [2022-01-31 19:19:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 928 states have (on average 1.25) internal successors, (1160), 928 states have internal predecessors, (1160), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:19:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1165 transitions. [2022-01-31 19:19:53,502 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1165 transitions. Word has length 921 [2022-01-31 19:19:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:19:53,503 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1165 transitions. [2022-01-31 19:19:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:19:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1165 transitions. [2022-01-31 19:19:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2022-01-31 19:19:53,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:19:53,508 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:19:53,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 19:19:53,509 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:19:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:19:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1555215373, now seen corresponding path program 114 times [2022-01-31 19:19:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:19:53,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022827756] [2022-01-31 19:19:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:19:53,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:19:53,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:19:53,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:19:53,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:19:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:58,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:19:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:19:58,306 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 19:19:58,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:19:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022827756] [2022-01-31 19:19:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022827756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:19:58,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:19:58,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 19:19:58,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247827095] [2022-01-31 19:19:58,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:19:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 19:19:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:19:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 19:19:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 19:19:58,308 INFO L87 Difference]: Start difference. First operand 934 states and 1165 transitions. Second operand has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 117 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:08,529 INFO L93 Difference]: Finished difference Result 1646 states and 2114 transitions. [2022-01-31 19:20:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 19:20:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 117 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 929 [2022-01-31 19:20:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:08,530 INFO L225 Difference]: With dead ends: 1646 [2022-01-31 19:20:08,530 INFO L226 Difference]: Without dead ends: 947 [2022-01-31 19:20:08,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 19:20:08,532 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 5025 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 1716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5026 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1716 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:08,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5026 Valid, 38 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1716 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:20:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-31 19:20:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 942. [2022-01-31 19:20:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.25) internal successors, (1170), 936 states have internal predecessors, (1170), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1175 transitions. [2022-01-31 19:20:08,938 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1175 transitions. Word has length 929 [2022-01-31 19:20:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1175 transitions. [2022-01-31 19:20:08,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.093220338983051) internal successors, (247), 117 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1175 transitions. [2022-01-31 19:20:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2022-01-31 19:20:08,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:08,944 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:08,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 19:20:08,944 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 869448882, now seen corresponding path program 115 times [2022-01-31 19:20:08,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225737032] [2022-01-31 19:20:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:08,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:08,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:08,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:09,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:13,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225737032] [2022-01-31 19:20:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225737032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:13,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:20:13,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481357976] [2022-01-31 19:20:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:13,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:20:13,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:20:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:20:13,875 INFO L87 Difference]: Start difference. First operand 942 states and 1175 transitions. Second operand has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 118 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:24,572 INFO L93 Difference]: Finished difference Result 1660 states and 2132 transitions. [2022-01-31 19:20:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 19:20:24,572 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 118 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 937 [2022-01-31 19:20:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:24,573 INFO L225 Difference]: With dead ends: 1660 [2022-01-31 19:20:24,573 INFO L226 Difference]: Without dead ends: 955 [2022-01-31 19:20:24,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 19:20:24,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3443 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:24,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3444 Valid, 63 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:20:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-31 19:20:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 950. [2022-01-31 19:20:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 944 states have (on average 1.25) internal successors, (1180), 944 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1185 transitions. [2022-01-31 19:20:25,036 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1185 transitions. Word has length 937 [2022-01-31 19:20:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:25,036 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1185 transitions. [2022-01-31 19:20:25,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.092436974789916) internal successors, (249), 118 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1185 transitions. [2022-01-31 19:20:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2022-01-31 19:20:25,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:25,042 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 19:20:25,042 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:25,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:25,042 INFO L85 PathProgramCache]: Analyzing trace with hash 801134121, now seen corresponding path program 116 times [2022-01-31 19:20:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:25,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377007974] [2022-01-31 19:20:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:25,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:25,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:25,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:25,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:30,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:30,013 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377007974] [2022-01-31 19:20:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377007974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:30,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:30,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 19:20:30,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949902849] [2022-01-31 19:20:30,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:30,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 19:20:30,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 19:20:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:20:30,017 INFO L87 Difference]: Start difference. First operand 950 states and 1185 transitions. Second operand has 120 states, 120 states have (on average 2.091666666666667) internal successors, (251), 119 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:40,541 INFO L93 Difference]: Finished difference Result 1674 states and 2150 transitions. [2022-01-31 19:20:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 19:20:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.091666666666667) internal successors, (251), 119 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 945 [2022-01-31 19:20:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:40,543 INFO L225 Difference]: With dead ends: 1674 [2022-01-31 19:20:40,543 INFO L226 Difference]: Without dead ends: 963 [2022-01-31 19:20:40,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 19:20:40,545 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4447 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 1523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4448 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1523 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:40,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4448 Valid, 33 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1523 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:20:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-31 19:20:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 958. [2022-01-31 19:20:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 952 states have (on average 1.25) internal successors, (1190), 952 states have internal predecessors, (1190), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1195 transitions. [2022-01-31 19:20:40,960 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1195 transitions. Word has length 945 [2022-01-31 19:20:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:40,960 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1195 transitions. [2022-01-31 19:20:40,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.091666666666667) internal successors, (251), 119 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1195 transitions. [2022-01-31 19:20:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2022-01-31 19:20:41,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:41,008 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:41,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 19:20:41,009 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash 440597646, now seen corresponding path program 117 times [2022-01-31 19:20:41,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336601222] [2022-01-31 19:20:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:41,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:41,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:41,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:41,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:45,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:20:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:20:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:20:45,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:20:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336601222] [2022-01-31 19:20:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [336601222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:20:45,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:20:45,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 19:20:45,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140958349] [2022-01-31 19:20:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:20:45,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 19:20:45,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:20:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 19:20:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 19:20:45,983 INFO L87 Difference]: Start difference. First operand 958 states and 1195 transitions. Second operand has 121 states, 121 states have (on average 2.090909090909091) internal successors, (253), 120 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:20:57,037 INFO L93 Difference]: Finished difference Result 1688 states and 2168 transitions. [2022-01-31 19:20:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 19:20:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.090909090909091) internal successors, (253), 120 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 953 [2022-01-31 19:20:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:20:57,038 INFO L225 Difference]: With dead ends: 1688 [2022-01-31 19:20:57,038 INFO L226 Difference]: Without dead ends: 971 [2022-01-31 19:20:57,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 19:20:57,040 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4269 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4270 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:20:57,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4270 Valid, 43 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:20:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-31 19:20:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 966. [2022-01-31 19:20:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 960 states have (on average 1.25) internal successors, (1200), 960 states have internal predecessors, (1200), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:20:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1205 transitions. [2022-01-31 19:20:57,505 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1205 transitions. Word has length 953 [2022-01-31 19:20:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:20:57,505 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1205 transitions. [2022-01-31 19:20:57,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.090909090909091) internal successors, (253), 120 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:20:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1205 transitions. [2022-01-31 19:20:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2022-01-31 19:20:57,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:20:57,511 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:20:57,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 19:20:57,511 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:20:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:20:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 610348613, now seen corresponding path program 118 times [2022-01-31 19:20:57,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:20:57,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642586947] [2022-01-31 19:20:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:20:57,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:20:57,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:20:57,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:20:57,617 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:20:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:02,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:21:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:21:02,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:21:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642586947] [2022-01-31 19:21:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [642586947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:21:02,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:21:02,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 19:21:02,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35419109] [2022-01-31 19:21:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:21:02,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 19:21:02,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:21:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 19:21:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 19:21:02,655 INFO L87 Difference]: Start difference. First operand 966 states and 1205 transitions. Second operand has 122 states, 122 states have (on average 2.0901639344262297) internal successors, (255), 121 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:21:13,859 INFO L93 Difference]: Finished difference Result 1702 states and 2186 transitions. [2022-01-31 19:21:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 19:21:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0901639344262297) internal successors, (255), 121 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 961 [2022-01-31 19:21:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:21:13,860 INFO L225 Difference]: With dead ends: 1702 [2022-01-31 19:21:13,860 INFO L226 Difference]: Without dead ends: 979 [2022-01-31 19:21:13,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 19:21:13,862 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4097 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4098 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:21:13,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4098 Valid, 43 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:21:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-31 19:21:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 974. [2022-01-31 19:21:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 968 states have (on average 1.25) internal successors, (1210), 968 states have internal predecessors, (1210), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 19:21:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1215 transitions. [2022-01-31 19:21:14,343 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1215 transitions. Word has length 961 [2022-01-31 19:21:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:21:14,343 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1215 transitions. [2022-01-31 19:21:14,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0901639344262297) internal successors, (255), 121 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:21:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1215 transitions. [2022-01-31 19:21:14,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 970 [2022-01-31 19:21:14,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:21:14,349 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:21:14,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 19:21:14,349 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:21:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:21:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1937498730, now seen corresponding path program 119 times [2022-01-31 19:21:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:21:14,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596397754] [2022-01-31 19:21:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:21:14,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 4 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:21:14,351 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:21:14,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:21:14,425 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:21:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:21:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:21:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:21:19,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:21:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596397754] [2022-01-31 19:21:19,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596397754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:21:19,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:21:19,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 19:21:19,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820010645] [2022-01-31 19:21:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:21:19,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 19:21:19,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:21:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 19:21:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 19:21:19,588 INFO L87 Difference]: Start difference. First operand 974 states and 1215 transitions. Second operand has 123 states, 123 states have (on average 2.089430894308943) internal successors, (257), 122 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)