/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:12:16,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:12:16,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:12:16,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:12:16,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 18:12:16,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 18:12:16,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 18:12:16,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 18:12:16,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 18:12:16,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 18:12:16,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 18:12:16,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 18:12:16,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 18:12:16,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 18:12:16,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 18:12:16,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 18:12:16,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 18:12:16,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:12:16,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:12:16,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:12:16,412 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 18:12:16,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:12:16,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:12:16,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:12:16,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:12:16,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:12:16,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:12:16,420 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:12:16,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:12:16,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:12:16,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:12:16,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:12:16,613 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:12:16,614 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:12:16,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-31 18:12:16,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e1f9ed3/c388c417712b4144b1ad133b342d436a/FLAG11e2e051d [2022-01-31 18:12:16,985 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:12:16,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2022-01-31 18:12:16,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e1f9ed3/c388c417712b4144b1ad133b342d436a/FLAG11e2e051d [2022-01-31 18:12:17,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e1f9ed3/c388c417712b4144b1ad133b342d436a [2022-01-31 18:12:17,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:12:17,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:12:17,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:12:17,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:12:17,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:12:17,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a66e2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17, skipping insertion in model container [2022-01-31 18:12:17,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:12:17,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:12:17,173 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-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-31 18:12:17,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:12:17,189 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:12:17,198 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-industry-pattern/array_assert_loop_dep.i[814,827] [2022-01-31 18:12:17,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:12:17,213 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:12:17,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17 WrapperNode [2022-01-31 18:12:17,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:12:17,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:12:17,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:12:17,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:12:17,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:12:17,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:12:17,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:12:17,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:12:17,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (1/1) ... [2022-01-31 18:12:17,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:12:17,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:12:17,281 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 18:12:17,300 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 18:12:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:12:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:12:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:12:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:12:17,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:12:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:12:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:12:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:12:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:12:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:12:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:12:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:12:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:12:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:12:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:12:17,375 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:12:17,377 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:12:17,445 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:12:17,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:12:17,449 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:12:17,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:12:17 BoogieIcfgContainer [2022-01-31 18:12:17,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:12:17,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:12:17,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:12:17,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:12:17,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:12:17" (1/3) ... [2022-01-31 18:12:17,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4314ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:12:17, skipping insertion in model container [2022-01-31 18:12:17,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:12:17" (2/3) ... [2022-01-31 18:12:17,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4314ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:12:17, skipping insertion in model container [2022-01-31 18:12:17,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:12:17" (3/3) ... [2022-01-31 18:12:17,456 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2022-01-31 18:12:17,459 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:12:17,460 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:12:17,489 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:12:17,504 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 18:12:17,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:12:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 18:12:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 18:12:17,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:17,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:17,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1028448074, now seen corresponding path program 1 times [2022-01-31 18:12:17,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038235864] [2022-01-31 18:12:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:17,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:17,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:17,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038235864] [2022-01-31 18:12:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038235864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:17,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:12:17,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779674403] [2022-01-31 18:12:17,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:17,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:12:17,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:12:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:12:17,700 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:17,728 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-01-31 18:12:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:12:17,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 18:12:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:17,734 INFO L225 Difference]: With dead ends: 42 [2022-01-31 18:12:17,734 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 18:12:17,736 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 18:12:17,738 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 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 18:12:17,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 18:12:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 18:12:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:12:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 18:12:17,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 18:12:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:17,762 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 18:12:17,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 18:12:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 18:12:17,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:17,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:17,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:12:17,774 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1606716, now seen corresponding path program 1 times [2022-01-31 18:12:17,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:17,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745275436] [2022-01-31 18:12:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:17,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:17,778 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:17,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745275436] [2022-01-31 18:12:17,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745275436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:17,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:17,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:12:17,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744233906] [2022-01-31 18:12:17,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:12:17,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:12:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:12:17,854 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:17,917 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-31 18:12:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:12:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 18:12:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:17,920 INFO L225 Difference]: With dead ends: 39 [2022-01-31 18:12:17,920 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 18:12:17,921 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 18:12:17,921 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:17,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 18:12:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-31 18:12:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:12:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 18:12:17,929 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-01-31 18:12:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 18:12:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 18:12:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 18:12:17,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:17,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:17,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:12:17,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:17,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1695231582, now seen corresponding path program 1 times [2022-01-31 18:12:17,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277021465] [2022-01-31 18:12:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:17,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:17,954 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:17,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:17,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,018 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 18:12:18,019 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277021465] [2022-01-31 18:12:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277021465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:18,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:18,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:12:18,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762778926] [2022-01-31 18:12:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:18,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:12:18,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:12:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:12:18,020 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:18,109 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-31 18:12:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:12:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 18:12:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:18,111 INFO L225 Difference]: With dead ends: 50 [2022-01-31 18:12:18,111 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 18:12:18,112 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 18:12:18,113 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:18,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:12:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 18:12:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 18:12:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:12:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 18:12:18,120 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2022-01-31 18:12:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 18:12:18,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 18:12:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 18:12:18,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:18,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:12:18,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1476122624, now seen corresponding path program 2 times [2022-01-31 18:12:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635288167] [2022-01-31 18:12:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:18,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:18,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:18,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:18,197 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635288167] [2022-01-31 18:12:18,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635288167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:18,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:18,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:12:18,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208762862] [2022-01-31 18:12:18,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:18,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:12:18,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:12:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:12:18,200 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 18:12:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:18,309 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-01-31 18:12:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:12:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 18:12:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:18,310 INFO L225 Difference]: With dead ends: 62 [2022-01-31 18:12:18,310 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 18:12:18,310 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 18:12:18,313 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:18,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 28 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 18:12:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-01-31 18:12:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 18:12:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-01-31 18:12:18,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2022-01-31 18:12:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:18,321 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-01-31 18:12:18,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 18:12:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-01-31 18:12:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 18:12:18,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:18,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:18,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:12:18,323 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1365811490, now seen corresponding path program 3 times [2022-01-31 18:12:18,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905280867] [2022-01-31 18:12:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:18,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:18,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:18,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:18,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:18,376 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905280867] [2022-01-31 18:12:18,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905280867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:18,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:12:18,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886835104] [2022-01-31 18:12:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:18,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:12:18,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:12:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:12:18,378 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:18,498 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-01-31 18:12:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:12:18,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 18:12:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:18,500 INFO L225 Difference]: With dead ends: 74 [2022-01-31 18:12:18,500 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 18:12:18,501 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 18:12:18,501 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:18,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 28 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 18:12:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-01-31 18:12:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 18:12:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-01-31 18:12:18,508 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 19 [2022-01-31 18:12:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:18,509 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-01-31 18:12:18,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-01-31 18:12:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 18:12:18,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:18,509 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:12:18,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1563973180, now seen corresponding path program 4 times [2022-01-31 18:12:18,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:18,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826309678] [2022-01-31 18:12:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:18,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:18,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:18,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:18,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:18,571 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826309678] [2022-01-31 18:12:18,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1826309678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:18,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:18,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:12:18,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390031866] [2022-01-31 18:12:18,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:18,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:12:18,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:12:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:12:18,574 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:18,699 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2022-01-31 18:12:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:12:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 18:12:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:18,701 INFO L225 Difference]: With dead ends: 86 [2022-01-31 18:12:18,701 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 18:12:18,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:12:18,702 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:18,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 38 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 18:12:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-31 18:12:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 18:12:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-01-31 18:12:18,710 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2022-01-31 18:12:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:18,711 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-01-31 18:12:18,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-01-31 18:12:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 18:12:18,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:18,711 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:18,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:12:18,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -411505126, now seen corresponding path program 5 times [2022-01-31 18:12:18,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728236948] [2022-01-31 18:12:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:18,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:18,714 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:18,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:18,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:18,816 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:18,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728236948] [2022-01-31 18:12:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [728236948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:18,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:12:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847917289] [2022-01-31 18:12:18,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:18,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:12:18,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:12:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:12:18,817 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:18,967 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-01-31 18:12:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:12:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 18:12:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:18,970 INFO L225 Difference]: With dead ends: 98 [2022-01-31 18:12:18,970 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 18:12:18,970 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 18:12:18,976 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:18,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 28 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 18:12:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-31 18:12:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 18:12:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-01-31 18:12:18,992 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 23 [2022-01-31 18:12:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:18,993 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-01-31 18:12:18,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-01-31 18:12:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 18:12:18,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:18,993 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:18,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:12:18,994 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash -470612360, now seen corresponding path program 6 times [2022-01-31 18:12:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:18,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692245124] [2022-01-31 18:12:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:18,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:18,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:18,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:18,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:19,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:19,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692245124] [2022-01-31 18:12:19,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [692245124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:19,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:19,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:12:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227463623] [2022-01-31 18:12:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:19,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:12:19,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:12:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:12:19,061 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18:12:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:19,197 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-01-31 18:12:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:12:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18:12:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:19,199 INFO L225 Difference]: With dead ends: 110 [2022-01-31 18:12:19,199 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 18:12:19,199 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 18:12:19,200 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:19,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 28 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 18:12:19,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-01-31 18:12:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 18:12:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-01-31 18:12:19,209 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2022-01-31 18:12:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-01-31 18:12:19,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 18:12:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-01-31 18:12:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 18:12:19,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:19,210 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:19,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:12:19,210 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:19,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1438089386, now seen corresponding path program 7 times [2022-01-31 18:12:19,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:19,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404103749] [2022-01-31 18:12:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:19,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:19,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:19,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:19,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:19,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:19,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404103749] [2022-01-31 18:12:19,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1404103749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:19,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:19,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:12:19,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106911769] [2022-01-31 18:12:19,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:19,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:12:19,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:12:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:12:19,303 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 18:12:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:19,446 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-01-31 18:12:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:12:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 27 [2022-01-31 18:12:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:19,447 INFO L225 Difference]: With dead ends: 122 [2022-01-31 18:12:19,447 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 18:12:19,448 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 18:12:19,448 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:19,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 28 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 18:12:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-01-31 18:12:19,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 18:12:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-01-31 18:12:19,456 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2022-01-31 18:12:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:19,456 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-01-31 18:12:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 18:12:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-01-31 18:12:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 18:12:19,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:19,457 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:19,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:12:19,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 824391860, now seen corresponding path program 8 times [2022-01-31 18:12:19,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220190601] [2022-01-31 18:12:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:19,459 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:19,459 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:19,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:19,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:19,541 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:19,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220190601] [2022-01-31 18:12:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220190601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:19,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:12:19,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830561694] [2022-01-31 18:12:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:19,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:12:19,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:12:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:12:19,542 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 18:12:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:19,725 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2022-01-31 18:12:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:12:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 18:12:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:19,726 INFO L225 Difference]: With dead ends: 134 [2022-01-31 18:12:19,726 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 18:12:19,727 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 18:12:19,727 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:19,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 38 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 18:12:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-01-31 18:12:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 18:12:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-01-31 18:12:19,735 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 29 [2022-01-31 18:12:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:19,735 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-01-31 18:12:19,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 18:12:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-01-31 18:12:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 18:12:19,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:19,736 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:19,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:12:19,736 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1815417490, now seen corresponding path program 9 times [2022-01-31 18:12:19,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:19,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136923208] [2022-01-31 18:12:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:19,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:19,738 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:19,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:19,739 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:19,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136923208] [2022-01-31 18:12:19,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136923208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:19,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:19,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:12:19,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848316619] [2022-01-31 18:12:19,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:12:19,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:12:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:12:19,813 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 18:12:20,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:20,011 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2022-01-31 18:12:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:12:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 31 [2022-01-31 18:12:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:20,012 INFO L225 Difference]: With dead ends: 146 [2022-01-31 18:12:20,013 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 18:12:20,013 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 18:12:20,014 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:20,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 28 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 18:12:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-01-31 18:12:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 18:12:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2022-01-31 18:12:20,038 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 31 [2022-01-31 18:12:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2022-01-31 18:12:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 18:12:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2022-01-31 18:12:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 18:12:20,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:20,039 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:12:20,039 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash 708308208, now seen corresponding path program 10 times [2022-01-31 18:12:20,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:20,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471179780] [2022-01-31 18:12:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:20,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:20,041 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:20,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:20,042 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:20,129 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:20,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471179780] [2022-01-31 18:12:20,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [471179780] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:20,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:20,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:12:20,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000990663] [2022-01-31 18:12:20,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:12:20,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:12:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:12:20,131 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 18:12:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:20,335 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2022-01-31 18:12:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:12:20,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 33 [2022-01-31 18:12:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:20,336 INFO L225 Difference]: With dead ends: 158 [2022-01-31 18:12:20,336 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 18:12:20,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:12:20,337 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 163 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:20,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 28 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 18:12:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-01-31 18:12:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 18:12:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2022-01-31 18:12:20,345 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 33 [2022-01-31 18:12:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:20,345 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2022-01-31 18:12:20,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 18:12:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2022-01-31 18:12:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 18:12:20,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:20,346 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:20,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:12:20,346 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1928177614, now seen corresponding path program 11 times [2022-01-31 18:12:20,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:20,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921961142] [2022-01-31 18:12:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:20,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:20,348 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:20,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:20,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:20,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921961142] [2022-01-31 18:12:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [921961142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:20,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:12:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34224057] [2022-01-31 18:12:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:20,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:12:20,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:12:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:12:20,442 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 18:12:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:20,678 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2022-01-31 18:12:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:12:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 18:12:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:20,679 INFO L225 Difference]: With dead ends: 170 [2022-01-31 18:12:20,679 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 18:12:20,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:12:20,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:20,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 38 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 18:12:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2022-01-31 18:12:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 18:12:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-01-31 18:12:20,688 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 35 [2022-01-31 18:12:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:20,688 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-01-31 18:12:20,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 18:12:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-01-31 18:12:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 18:12:20,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:20,689 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:20,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:12:20,689 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1696604972, now seen corresponding path program 12 times [2022-01-31 18:12:20,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:20,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84582548] [2022-01-31 18:12:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:20,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:20,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:20,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:20,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:20,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84582548] [2022-01-31 18:12:20,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [84582548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:20,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:20,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:12:20,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185020588] [2022-01-31 18:12:20,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:20,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:12:20,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:12:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:12:20,792 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:21,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:21,044 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2022-01-31 18:12:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:12:21,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 18:12:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:21,046 INFO L225 Difference]: With dead ends: 182 [2022-01-31 18:12:21,046 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 18:12:21,047 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 18:12:21,047 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 191 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:21,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 28 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 18:12:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-01-31 18:12:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 18:12:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-01-31 18:12:21,056 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 37 [2022-01-31 18:12:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-01-31 18:12:21,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:12:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-01-31 18:12:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 18:12:21,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:21,059 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:21,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:12:21,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1801371894, now seen corresponding path program 13 times [2022-01-31 18:12:21,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751436517] [2022-01-31 18:12:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:21,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:21,061 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:21,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:21,062 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:21,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:21,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:21,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751436517] [2022-01-31 18:12:21,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751436517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:21,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:21,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:12:21,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458023495] [2022-01-31 18:12:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:21,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:12:21,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:12:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:12:21,216 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 18:12:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:21,494 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2022-01-31 18:12:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:12:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 39 [2022-01-31 18:12:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:21,495 INFO L225 Difference]: With dead ends: 194 [2022-01-31 18:12:21,495 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 18:12:21,496 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 18:12:21,496 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 187 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:21,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 33 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 18:12:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-01-31 18:12:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 18:12:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2022-01-31 18:12:21,504 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 39 [2022-01-31 18:12:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:21,505 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2022-01-31 18:12:21,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 18:12:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2022-01-31 18:12:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 18:12:21,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:21,505 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:21,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:12:21,505 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash -397747352, now seen corresponding path program 14 times [2022-01-31 18:12:21,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:21,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983681842] [2022-01-31 18:12:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:21,507 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:21,507 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:21,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:21,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:21,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:21,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:21,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983681842] [2022-01-31 18:12:21,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983681842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:21,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:21,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:12:21,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174185754] [2022-01-31 18:12:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:21,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:12:21,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:12:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:12:21,637 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 18:12:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:21,932 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2022-01-31 18:12:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:12:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 18:12:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:21,933 INFO L225 Difference]: With dead ends: 206 [2022-01-31 18:12:21,933 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 18:12:21,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:12:21,934 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:21,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 28 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:12:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 18:12:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-01-31 18:12:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 18:12:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2022-01-31 18:12:21,945 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 41 [2022-01-31 18:12:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:21,945 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2022-01-31 18:12:21,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 18:12:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2022-01-31 18:12:21,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 18:12:21,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:21,945 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:21,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:12:21,946 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash -134293434, now seen corresponding path program 15 times [2022-01-31 18:12:21,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:21,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47700851] [2022-01-31 18:12:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:21,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:21,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:21,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:21,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:22,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:22,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:22,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47700851] [2022-01-31 18:12:22,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [47700851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:22,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:22,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:12:22,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165777707] [2022-01-31 18:12:22,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:22,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:12:22,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:12:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:12:22,092 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 18:12:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:22,432 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2022-01-31 18:12:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:12:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 43 [2022-01-31 18:12:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:22,433 INFO L225 Difference]: With dead ends: 218 [2022-01-31 18:12:22,433 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 18:12:22,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:12:22,435 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 212 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:22,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 33 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 18:12:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-01-31 18:12:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 18:12:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2022-01-31 18:12:22,444 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 43 [2022-01-31 18:12:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:22,445 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2022-01-31 18:12:22,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 18:12:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2022-01-31 18:12:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 18:12:22,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:22,445 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:22,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:12:22,446 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -358148700, now seen corresponding path program 16 times [2022-01-31 18:12:22,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:22,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367281750] [2022-01-31 18:12:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:22,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:22,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:22,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:22,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:22,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367281750] [2022-01-31 18:12:22,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [367281750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:22,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:22,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:12:22,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384068307] [2022-01-31 18:12:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:22,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:12:22,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:12:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:12:22,641 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 18:12:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:22,988 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2022-01-31 18:12:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:12:22,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 45 [2022-01-31 18:12:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:22,989 INFO L225 Difference]: With dead ends: 230 [2022-01-31 18:12:22,989 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 18:12:22,990 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 18:12:22,990 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:22,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 28 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 18:12:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-01-31 18:12:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 18:12:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2022-01-31 18:12:22,999 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 45 [2022-01-31 18:12:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:22,999 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2022-01-31 18:12:22,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 18:12:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2022-01-31 18:12:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 18:12:22,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:22,999 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:22,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:12:22,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash -734694526, now seen corresponding path program 17 times [2022-01-31 18:12:23,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:23,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066814129] [2022-01-31 18:12:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:23,001 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:23,001 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:23,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:23,002 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:23,169 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:23,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066814129] [2022-01-31 18:12:23,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066814129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:23,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:23,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:12:23,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301475756] [2022-01-31 18:12:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:23,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:12:23,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:23,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:12:23,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:12:23,170 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 18:12:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:23,602 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-01-31 18:12:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:12:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 18:12:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:23,603 INFO L225 Difference]: With dead ends: 242 [2022-01-31 18:12:23,603 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 18:12:23,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:12:23,604 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 201 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:23,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 58 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 18:12:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-01-31 18:12:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 18:12:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2022-01-31 18:12:23,616 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 47 [2022-01-31 18:12:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:23,616 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2022-01-31 18:12:23,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 18:12:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2022-01-31 18:12:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 18:12:23,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:23,617 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:23,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:12:23,617 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:23,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1817980448, now seen corresponding path program 18 times [2022-01-31 18:12:23,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:23,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814314069] [2022-01-31 18:12:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:23,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:23,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:23,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:23,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:23,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:23,800 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 18:12:23,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814314069] [2022-01-31 18:12:23,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [814314069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:23,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:23,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:12:23,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200497470] [2022-01-31 18:12:23,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:23,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:12:23,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:12:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:12:23,802 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 18:12:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:24,229 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2022-01-31 18:12:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:12:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 49 [2022-01-31 18:12:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:24,230 INFO L225 Difference]: With dead ends: 254 [2022-01-31 18:12:24,230 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 18:12:24,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:12:24,231 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 236 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:24,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 53 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 18:12:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-01-31 18:12:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 18:12:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2022-01-31 18:12:24,240 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 49 [2022-01-31 18:12:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:24,241 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2022-01-31 18:12:24,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 18:12:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2022-01-31 18:12:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 18:12:24,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:24,241 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:24,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:12:24,241 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 821301438, now seen corresponding path program 19 times [2022-01-31 18:12:24,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:24,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110895241] [2022-01-31 18:12:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:24,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:24,243 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:24,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:24,244 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:24,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110895241] [2022-01-31 18:12:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110895241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:24,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:24,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:12:24,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153841165] [2022-01-31 18:12:24,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:24,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:12:24,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:12:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:12:24,428 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 18:12:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:24,840 INFO L93 Difference]: Finished difference Result 266 states and 310 transitions. [2022-01-31 18:12:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:12:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 51 [2022-01-31 18:12:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:24,841 INFO L225 Difference]: With dead ends: 266 [2022-01-31 18:12:24,841 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 18:12:24,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:12:24,842 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 265 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:24,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 38 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 18:12:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-01-31 18:12:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 18:12:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2022-01-31 18:12:24,854 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 51 [2022-01-31 18:12:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:24,854 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2022-01-31 18:12:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 18:12:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2022-01-31 18:12:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 18:12:24,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:24,854 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:24,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:12:24,855 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:24,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1154478052, now seen corresponding path program 20 times [2022-01-31 18:12:24,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855621717] [2022-01-31 18:12:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:24,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:24,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:24,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:24,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:25,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855621717] [2022-01-31 18:12:25,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1855621717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:25,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:25,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:12:25,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931365005] [2022-01-31 18:12:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:25,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:12:25,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:12:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:12:25,061 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 18:12:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:25,515 INFO L93 Difference]: Finished difference Result 278 states and 324 transitions. [2022-01-31 18:12:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:12:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 18:12:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:25,516 INFO L225 Difference]: With dead ends: 278 [2022-01-31 18:12:25,516 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 18:12:25,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:12:25,517 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 282 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:25,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 33 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 18:12:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-01-31 18:12:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 18:12:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-01-31 18:12:25,527 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 53 [2022-01-31 18:12:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:25,528 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-01-31 18:12:25,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 18:12:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-01-31 18:12:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 18:12:25,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:25,528 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:25,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:12:25,528 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:25,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1503023110, now seen corresponding path program 21 times [2022-01-31 18:12:25,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:25,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61359723] [2022-01-31 18:12:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:25,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:25,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:25,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:25,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:25,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:25,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61359723] [2022-01-31 18:12:25,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [61359723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:25,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:25,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:12:25,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111082394] [2022-01-31 18:12:25,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:25,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:12:25,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:12:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:12:25,754 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 18:12:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:26,212 INFO L93 Difference]: Finished difference Result 290 states and 338 transitions. [2022-01-31 18:12:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:12:26,212 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 55 [2022-01-31 18:12:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:26,214 INFO L225 Difference]: With dead ends: 290 [2022-01-31 18:12:26,214 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 18:12:26,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:12:26,216 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 338 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:26,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 28 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 18:12:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-01-31 18:12:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 18:12:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2022-01-31 18:12:26,227 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 55 [2022-01-31 18:12:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:26,227 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2022-01-31 18:12:26,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 18:12:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2022-01-31 18:12:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 18:12:26,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:26,228 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:26,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:12:26,228 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1447374760, now seen corresponding path program 22 times [2022-01-31 18:12:26,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:26,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529678783] [2022-01-31 18:12:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:26,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:26,230 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:26,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:26,231 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:26,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529678783] [2022-01-31 18:12:26,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [529678783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:26,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:26,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:12:26,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856196547] [2022-01-31 18:12:26,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:26,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:12:26,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:12:26,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:12:26,479 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 18:12:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:27,031 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2022-01-31 18:12:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:12:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 57 [2022-01-31 18:12:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:27,033 INFO L225 Difference]: With dead ends: 302 [2022-01-31 18:12:27,033 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 18:12:27,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:12:27,034 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 355 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:27,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 38 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 18:12:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-01-31 18:12:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 18:12:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2022-01-31 18:12:27,045 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 57 [2022-01-31 18:12:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:27,045 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2022-01-31 18:12:27,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 18:12:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2022-01-31 18:12:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 18:12:27,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:27,046 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:27,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:12:27,046 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 491082038, now seen corresponding path program 23 times [2022-01-31 18:12:27,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:27,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27232327] [2022-01-31 18:12:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:27,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:27,048 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:27,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:27,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:27,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27232327] [2022-01-31 18:12:27,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [27232327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:27,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:27,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:12:27,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024007739] [2022-01-31 18:12:27,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:27,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:12:27,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:12:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:12:27,285 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 18:12:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:27,815 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2022-01-31 18:12:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:12:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 18:12:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:27,816 INFO L225 Difference]: With dead ends: 314 [2022-01-31 18:12:27,816 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 18:12:27,817 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 18:12:27,818 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 378 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:27,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 38 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:12:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 18:12:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-01-31 18:12:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 18:12:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2022-01-31 18:12:27,830 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 59 [2022-01-31 18:12:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:27,830 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2022-01-31 18:12:27,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 18:12:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2022-01-31 18:12:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 18:12:27,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:27,831 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:27,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:12:27,831 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -667741548, now seen corresponding path program 24 times [2022-01-31 18:12:27,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:27,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508949309] [2022-01-31 18:12:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:27,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:27,833 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:27,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:27,834 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:28,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508949309] [2022-01-31 18:12:28,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508949309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:28,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:28,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:12:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517110561] [2022-01-31 18:12:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:28,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:12:28,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:12:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:12:28,084 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 18:12:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:28,672 INFO L93 Difference]: Finished difference Result 326 states and 380 transitions. [2022-01-31 18:12:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:12:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 61 [2022-01-31 18:12:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:28,673 INFO L225 Difference]: With dead ends: 326 [2022-01-31 18:12:28,673 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 18:12:28,674 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 18:12:28,674 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 356 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:28,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 43 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 18:12:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2022-01-31 18:12:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-31 18:12:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2022-01-31 18:12:28,687 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 61 [2022-01-31 18:12:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:28,688 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2022-01-31 18:12:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 18:12:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2022-01-31 18:12:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 18:12:28,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:28,688 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:28,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:12:28,688 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1900678030, now seen corresponding path program 25 times [2022-01-31 18:12:28,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723759526] [2022-01-31 18:12:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:28,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:28,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:28,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:28,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:28,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:28,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723759526] [2022-01-31 18:12:28,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723759526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:28,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:28,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:12:28,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110995005] [2022-01-31 18:12:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:12:28,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:28,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:12:28,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:12:28,962 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 18:12:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:29,555 INFO L93 Difference]: Finished difference Result 338 states and 394 transitions. [2022-01-31 18:12:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:12:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 63 [2022-01-31 18:12:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:29,557 INFO L225 Difference]: With dead ends: 338 [2022-01-31 18:12:29,557 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 18:12:29,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:12:29,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 427 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:29,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 33 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 18:12:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-01-31 18:12:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-31 18:12:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2022-01-31 18:12:29,573 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 63 [2022-01-31 18:12:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2022-01-31 18:12:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 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 18:12:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2022-01-31 18:12:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 18:12:29,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:29,573 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:12:29,574 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1341663536, now seen corresponding path program 26 times [2022-01-31 18:12:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:29,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424074315] [2022-01-31 18:12:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:29,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:29,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:29,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:29,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:29,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424074315] [2022-01-31 18:12:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1424074315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:29,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:29,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:12:29,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631028244] [2022-01-31 18:12:29,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:12:29,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:12:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:12:29,867 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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 18:12:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:30,501 INFO L93 Difference]: Finished difference Result 350 states and 408 transitions. [2022-01-31 18:12:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:12:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 18:12:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:30,502 INFO L225 Difference]: With dead ends: 350 [2022-01-31 18:12:30,502 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 18:12:30,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:12:30,504 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 399 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:30,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 33 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 18:12:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-01-31 18:12:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 18:12:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2022-01-31 18:12:30,533 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 65 [2022-01-31 18:12:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:30,534 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2022-01-31 18:12:30,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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 18:12:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2022-01-31 18:12:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 18:12:30,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:30,534 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:30,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:12:30,534 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash -999646802, now seen corresponding path program 27 times [2022-01-31 18:12:30,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:30,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368406405] [2022-01-31 18:12:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:30,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:30,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:30,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:30,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:30,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:30,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:30,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368406405] [2022-01-31 18:12:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [368406405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:30,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:30,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:12:30,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444986365] [2022-01-31 18:12:30,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:30,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:12:30,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:12:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:12:30,852 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 18:12:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:31,544 INFO L93 Difference]: Finished difference Result 362 states and 422 transitions. [2022-01-31 18:12:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:12:31,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 67 [2022-01-31 18:12:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:31,545 INFO L225 Difference]: With dead ends: 362 [2022-01-31 18:12:31,545 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 18:12:31,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:12:31,551 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 392 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:31,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 33 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 18:12:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-01-31 18:12:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 31 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 18:12:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2022-01-31 18:12:31,578 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 67 [2022-01-31 18:12:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:31,579 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2022-01-31 18:12:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 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 18:12:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2022-01-31 18:12:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 18:12:31,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:31,580 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:31,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:12:31,580 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1260920076, now seen corresponding path program 28 times [2022-01-31 18:12:31,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:31,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639283427] [2022-01-31 18:12:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:31,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:31,582 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:31,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:31,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:31,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:31,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639283427] [2022-01-31 18:12:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639283427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:31,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:31,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:12:31,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454047949] [2022-01-31 18:12:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:31,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:12:31,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:12:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:12:31,933 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 18:12:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:32,608 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2022-01-31 18:12:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:12:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 69 [2022-01-31 18:12:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:32,610 INFO L225 Difference]: With dead ends: 374 [2022-01-31 18:12:32,610 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 18:12:32,611 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 18:12:32,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 442 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 33 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 18:12:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2022-01-31 18:12:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 18:12:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 252 transitions. [2022-01-31 18:12:32,629 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 252 transitions. Word has length 69 [2022-01-31 18:12:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:32,629 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 252 transitions. [2022-01-31 18:12:32,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 18:12:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 252 transitions. [2022-01-31 18:12:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 18:12:32,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:32,629 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:12:32,630 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:32,631 INFO L85 PathProgramCache]: Analyzing trace with hash 412238058, now seen corresponding path program 29 times [2022-01-31 18:12:32,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792644926] [2022-01-31 18:12:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:32,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:32,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:32,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:32,635 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:32,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:32,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792644926] [2022-01-31 18:12:32,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1792644926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:32,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:32,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:12:32,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237981825] [2022-01-31 18:12:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:32,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:12:32,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:12:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:12:32,972 INFO L87 Difference]: Start difference. First operand 221 states and 252 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 18:12:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:33,741 INFO L93 Difference]: Finished difference Result 386 states and 450 transitions. [2022-01-31 18:12:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:12:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 18:12:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:33,742 INFO L225 Difference]: With dead ends: 386 [2022-01-31 18:12:33,742 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 18:12:33,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:12:33,744 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 396 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:33,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 53 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 18:12:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2022-01-31 18:12:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 33 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 18:12:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2022-01-31 18:12:33,760 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 71 [2022-01-31 18:12:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:33,761 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2022-01-31 18:12:33,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 18:12:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2022-01-31 18:12:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 18:12:33,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:33,761 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:33,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:12:33,761 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:33,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:33,762 INFO L85 PathProgramCache]: Analyzing trace with hash 872605000, now seen corresponding path program 30 times [2022-01-31 18:12:33,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:33,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870836763] [2022-01-31 18:12:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:33,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:33,763 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:33,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:33,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:34,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:34,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870836763] [2022-01-31 18:12:34,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870836763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:34,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:34,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:12:34,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123831237] [2022-01-31 18:12:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:34,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:12:34,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:34,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:12:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:12:34,114 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 18:12:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:34,867 INFO L93 Difference]: Finished difference Result 398 states and 464 transitions. [2022-01-31 18:12:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:12:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 73 [2022-01-31 18:12:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:34,868 INFO L225 Difference]: With dead ends: 398 [2022-01-31 18:12:34,868 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 18:12:34,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:12:34,870 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 407 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:34,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 33 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 18:12:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2022-01-31 18:12:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 34 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 18:12:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 268 transitions. [2022-01-31 18:12:34,889 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 268 transitions. Word has length 73 [2022-01-31 18:12:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:34,889 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 268 transitions. [2022-01-31 18:12:34,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 18:12:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 268 transitions. [2022-01-31 18:12:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 18:12:34,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:34,889 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:34,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:12:34,890 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 903604774, now seen corresponding path program 31 times [2022-01-31 18:12:34,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296138724] [2022-01-31 18:12:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:34,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:34,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:34,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:34,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:35,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296138724] [2022-01-31 18:12:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [296138724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:35,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:35,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:12:35,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902134735] [2022-01-31 18:12:35,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:35,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:12:35,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:12:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:12:35,255 INFO L87 Difference]: Start difference. First operand 235 states and 268 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 18:12:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:36,071 INFO L93 Difference]: Finished difference Result 410 states and 478 transitions. [2022-01-31 18:12:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:12:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 75 [2022-01-31 18:12:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:36,072 INFO L225 Difference]: With dead ends: 410 [2022-01-31 18:12:36,072 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 18:12:36,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:12:36,074 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 514 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:36,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 38 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 18:12:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-01-31 18:12:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 35 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 18:12:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 276 transitions. [2022-01-31 18:12:36,098 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 276 transitions. Word has length 75 [2022-01-31 18:12:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:36,099 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 276 transitions. [2022-01-31 18:12:36,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 18:12:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 276 transitions. [2022-01-31 18:12:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 18:12:36,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:36,100 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:36,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:12:36,100 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash 629616516, now seen corresponding path program 32 times [2022-01-31 18:12:36,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:36,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584941089] [2022-01-31 18:12:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:36,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:36,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:36,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:36,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:36,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584941089] [2022-01-31 18:12:36,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [584941089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:36,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:36,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:12:36,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636686697] [2022-01-31 18:12:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:36,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:12:36,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:12:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:12:36,500 INFO L87 Difference]: Start difference. First operand 242 states and 276 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 18:12:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:37,336 INFO L93 Difference]: Finished difference Result 422 states and 492 transitions. [2022-01-31 18:12:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:12:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 18:12:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:37,339 INFO L225 Difference]: With dead ends: 422 [2022-01-31 18:12:37,339 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 18:12:37,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:12:37,340 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 525 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:37,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 33 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 18:12:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2022-01-31 18:12:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 36 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 18:12:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2022-01-31 18:12:37,367 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 77 [2022-01-31 18:12:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:37,367 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2022-01-31 18:12:37,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 18:12:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2022-01-31 18:12:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 18:12:37,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:37,368 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:37,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:12:37,368 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash -680094366, now seen corresponding path program 33 times [2022-01-31 18:12:37,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756426114] [2022-01-31 18:12:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:37,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:37,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:37,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:37,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:37,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:37,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756426114] [2022-01-31 18:12:37,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756426114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:37,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:37,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:12:37,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581290923] [2022-01-31 18:12:37,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:12:37,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:12:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:12:37,813 INFO L87 Difference]: Start difference. First operand 249 states and 284 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 18:12:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:38,641 INFO L93 Difference]: Finished difference Result 434 states and 506 transitions. [2022-01-31 18:12:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:12:38,642 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 79 [2022-01-31 18:12:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:38,643 INFO L225 Difference]: With dead ends: 434 [2022-01-31 18:12:38,643 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:12:38,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:12:38,645 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 452 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:38,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 48 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:12:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2022-01-31 18:12:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 37 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 18:12:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2022-01-31 18:12:38,666 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 79 [2022-01-31 18:12:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:38,666 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2022-01-31 18:12:38,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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 18:12:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2022-01-31 18:12:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 18:12:38,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:38,666 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:38,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:12:38,667 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash -886834240, now seen corresponding path program 34 times [2022-01-31 18:12:38,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229127113] [2022-01-31 18:12:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:38,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:38,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:38,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:38,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:39,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:39,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229127113] [2022-01-31 18:12:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229127113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:39,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:39,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:12:39,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249524032] [2022-01-31 18:12:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:39,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:12:39,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:12:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:12:39,115 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 18:12:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:39,973 INFO L93 Difference]: Finished difference Result 446 states and 520 transitions. [2022-01-31 18:12:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:12:39,974 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 81 [2022-01-31 18:12:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:39,975 INFO L225 Difference]: With dead ends: 446 [2022-01-31 18:12:39,975 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 18:12:39,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:12:39,977 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 421 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:39,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 58 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 18:12:39,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2022-01-31 18:12:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 38 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 18:12:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2022-01-31 18:12:40,000 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 81 [2022-01-31 18:12:40,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:40,000 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2022-01-31 18:12:40,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 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 18:12:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2022-01-31 18:12:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 18:12:40,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:40,001 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:12:40,001 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1995357538, now seen corresponding path program 35 times [2022-01-31 18:12:40,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:40,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154698179] [2022-01-31 18:12:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:40,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:40,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:40,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:40,004 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:40,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:40,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154698179] [2022-01-31 18:12:40,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1154698179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:40,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:40,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:12:40,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285786833] [2022-01-31 18:12:40,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:40,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:12:40,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:12:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:12:40,461 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 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 18:12:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:41,340 INFO L93 Difference]: Finished difference Result 458 states and 534 transitions. [2022-01-31 18:12:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:12:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 18:12:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:41,342 INFO L225 Difference]: With dead ends: 458 [2022-01-31 18:12:41,342 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 18:12:41,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:12:41,343 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 633 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:41,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 38 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:12:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 18:12:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2022-01-31 18:12:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 39 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 18:12:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 308 transitions. [2022-01-31 18:12:41,365 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 308 transitions. Word has length 83 [2022-01-31 18:12:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:41,365 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 308 transitions. [2022-01-31 18:12:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 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 18:12:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 308 transitions. [2022-01-31 18:12:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 18:12:41,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:41,366 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:12:41,366 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2134357508, now seen corresponding path program 36 times [2022-01-31 18:12:41,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:41,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139012418] [2022-01-31 18:12:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:41,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:41,368 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:41,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:41,369 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:41,833 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 18:12:41,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:41,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139012418] [2022-01-31 18:12:41,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139012418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:41,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:41,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:12:41,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891436958] [2022-01-31 18:12:41,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:41,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:12:41,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:12:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:12:41,834 INFO L87 Difference]: Start difference. First operand 270 states and 308 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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 18:12:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:42,811 INFO L93 Difference]: Finished difference Result 470 states and 548 transitions. [2022-01-31 18:12:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:12:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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 85 [2022-01-31 18:12:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:42,813 INFO L225 Difference]: With dead ends: 470 [2022-01-31 18:12:42,813 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 18:12:42,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:12:42,814 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 575 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 33 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 18:12:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 277. [2022-01-31 18:12:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 40 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-31 18:12:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 316 transitions. [2022-01-31 18:12:42,838 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 316 transitions. Word has length 85 [2022-01-31 18:12:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:42,839 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 316 transitions. [2022-01-31 18:12:42,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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 18:12:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 316 transitions. [2022-01-31 18:12:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 18:12:42,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:42,839 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:42,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:12:42,839 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1725624794, now seen corresponding path program 37 times [2022-01-31 18:12:42,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:42,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036823694] [2022-01-31 18:12:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:42,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:42,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:42,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:42,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:43,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:43,370 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 18:12:43,371 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:43,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036823694] [2022-01-31 18:12:43,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2036823694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:43,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:43,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:12:43,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580297527] [2022-01-31 18:12:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:43,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:12:43,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:12:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:12:43,372 INFO L87 Difference]: Start difference. First operand 277 states and 316 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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 18:12:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:44,394 INFO L93 Difference]: Finished difference Result 482 states and 562 transitions. [2022-01-31 18:12:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:12:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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 87 [2022-01-31 18:12:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:44,396 INFO L225 Difference]: With dead ends: 482 [2022-01-31 18:12:44,397 INFO L226 Difference]: Without dead ends: 286 [2022-01-31 18:12:44,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:12:44,398 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 475 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:44,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 53 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-31 18:12:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2022-01-31 18:12:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 240 states have (on average 1.0125) internal successors, (243), 240 states have internal predecessors, (243), 41 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 18:12:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 324 transitions. [2022-01-31 18:12:44,422 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 324 transitions. Word has length 87 [2022-01-31 18:12:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:44,422 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 324 transitions. [2022-01-31 18:12:44,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 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 18:12:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 324 transitions. [2022-01-31 18:12:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 18:12:44,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:44,425 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:44,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:12:44,425 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 316873272, now seen corresponding path program 38 times [2022-01-31 18:12:44,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:44,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011636850] [2022-01-31 18:12:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:44,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:44,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:44,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:44,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:44,980 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:44,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011636850] [2022-01-31 18:12:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011636850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:44,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:44,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:12:44,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453784097] [2022-01-31 18:12:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:44,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:12:44,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:12:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:12:44,981 INFO L87 Difference]: Start difference. First operand 284 states and 324 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 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 18:12:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:46,032 INFO L93 Difference]: Finished difference Result 494 states and 576 transitions. [2022-01-31 18:12:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:12:46,032 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 18:12:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:46,033 INFO L225 Difference]: With dead ends: 494 [2022-01-31 18:12:46,033 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 18:12:46,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:12:46,035 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 543 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:46,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 38 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 18:12:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 291. [2022-01-31 18:12:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 42 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 18:12:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 332 transitions. [2022-01-31 18:12:46,060 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 332 transitions. Word has length 89 [2022-01-31 18:12:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:46,061 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 332 transitions. [2022-01-31 18:12:46,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 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 18:12:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 332 transitions. [2022-01-31 18:12:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 18:12:46,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:46,061 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:46,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:12:46,062 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash -578641130, now seen corresponding path program 39 times [2022-01-31 18:12:46,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:46,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804254922] [2022-01-31 18:12:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:46,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:46,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:46,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:46,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:46,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:46,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:46,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804254922] [2022-01-31 18:12:46,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1804254922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:46,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:46,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:12:46,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002873397] [2022-01-31 18:12:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:46,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:12:46,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:12:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:12:46,614 INFO L87 Difference]: Start difference. First operand 291 states and 332 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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 18:12:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:47,812 INFO L93 Difference]: Finished difference Result 506 states and 590 transitions. [2022-01-31 18:12:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:12:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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 91 [2022-01-31 18:12:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:47,814 INFO L225 Difference]: With dead ends: 506 [2022-01-31 18:12:47,814 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 18:12:47,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:12:47,816 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 608 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:47,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 38 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:12:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 18:12:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2022-01-31 18:12:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 43 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 18:12:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 340 transitions. [2022-01-31 18:12:47,857 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 340 transitions. Word has length 91 [2022-01-31 18:12:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:47,857 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 340 transitions. [2022-01-31 18:12:47,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 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 18:12:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 340 transitions. [2022-01-31 18:12:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 18:12:47,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:47,859 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:47,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:12:47,859 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2120445044, now seen corresponding path program 40 times [2022-01-31 18:12:47,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566997349] [2022-01-31 18:12:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:47,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:47,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:47,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:47,868 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:48,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:48,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566997349] [2022-01-31 18:12:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566997349] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:48,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:12:48,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974876329] [2022-01-31 18:12:48,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:48,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:12:48,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:12:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:12:48,541 INFO L87 Difference]: Start difference. First operand 298 states and 340 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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 18:12:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:49,617 INFO L93 Difference]: Finished difference Result 518 states and 604 transitions. [2022-01-31 18:12:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:12:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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 93 [2022-01-31 18:12:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:49,619 INFO L225 Difference]: With dead ends: 518 [2022-01-31 18:12:49,619 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 18:12:49,621 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 18:12:49,621 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 556 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:49,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 43 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 18:12:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-01-31 18:12:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 44 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 18:12:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 348 transitions. [2022-01-31 18:12:49,649 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 348 transitions. Word has length 93 [2022-01-31 18:12:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:49,649 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 348 transitions. [2022-01-31 18:12:49,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 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 18:12:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 348 transitions. [2022-01-31 18:12:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:12:49,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:49,650 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:49,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:12:49,650 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1782011474, now seen corresponding path program 41 times [2022-01-31 18:12:49,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:49,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646113422] [2022-01-31 18:12:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:49,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:49,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:49,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:49,654 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:50,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:50,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646113422] [2022-01-31 18:12:50,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [646113422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:50,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:50,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:12:50,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765622220] [2022-01-31 18:12:50,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:50,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:12:50,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:12:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:12:50,265 INFO L87 Difference]: Start difference. First operand 305 states and 348 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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 18:12:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:51,454 INFO L93 Difference]: Finished difference Result 530 states and 618 transitions. [2022-01-31 18:12:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:12:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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 95 [2022-01-31 18:12:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:51,456 INFO L225 Difference]: With dead ends: 530 [2022-01-31 18:12:51,456 INFO L226 Difference]: Without dead ends: 314 [2022-01-31 18:12:51,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:12:51,458 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 603 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:51,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 48 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-31 18:12:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2022-01-31 18:12:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 264 states have (on average 1.0113636363636365) internal successors, (267), 264 states have internal predecessors, (267), 45 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-31 18:12:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 356 transitions. [2022-01-31 18:12:51,504 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 356 transitions. Word has length 95 [2022-01-31 18:12:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:51,506 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 356 transitions. [2022-01-31 18:12:51,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 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 18:12:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 356 transitions. [2022-01-31 18:12:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 18:12:51,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:51,506 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:51,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:12:51,507 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1330102096, now seen corresponding path program 42 times [2022-01-31 18:12:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:51,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359450634] [2022-01-31 18:12:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:51,509 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:51,509 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:51,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:51,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:52,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:52,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:52,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359450634] [2022-01-31 18:12:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [359450634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:52,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:52,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:12:52,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122211246] [2022-01-31 18:12:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:12:52,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:12:52,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:12:52,106 INFO L87 Difference]: Start difference. First operand 312 states and 356 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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 18:12:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:53,327 INFO L93 Difference]: Finished difference Result 542 states and 632 transitions. [2022-01-31 18:12:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:12:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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 97 [2022-01-31 18:12:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:53,329 INFO L225 Difference]: With dead ends: 542 [2022-01-31 18:12:53,329 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 18:12:53,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:12:53,330 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 548 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:53,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 58 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 18:12:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2022-01-31 18:12:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 18:12:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 364 transitions. [2022-01-31 18:12:53,359 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 364 transitions. Word has length 97 [2022-01-31 18:12:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:53,361 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 364 transitions. [2022-01-31 18:12:53,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 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 18:12:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 364 transitions. [2022-01-31 18:12:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 18:12:53,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:53,361 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:53,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:12:53,362 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1520962446, now seen corresponding path program 43 times [2022-01-31 18:12:53,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:53,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732278978] [2022-01-31 18:12:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:53,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:53,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:53,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:53,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:53,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:54,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:54,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732278978] [2022-01-31 18:12:54,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [732278978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:54,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:12:54,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278900745] [2022-01-31 18:12:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:12:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:12:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:12:54,013 INFO L87 Difference]: Start difference. First operand 319 states and 364 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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 18:12:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:55,243 INFO L93 Difference]: Finished difference Result 554 states and 646 transitions. [2022-01-31 18:12:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:12:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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 99 [2022-01-31 18:12:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:55,244 INFO L225 Difference]: With dead ends: 554 [2022-01-31 18:12:55,244 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 18:12:55,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:12:55,246 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 625 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:55,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 43 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:12:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 18:12:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-01-31 18:12:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 47 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 18:12:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 372 transitions. [2022-01-31 18:12:55,277 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 372 transitions. Word has length 99 [2022-01-31 18:12:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:55,277 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 372 transitions. [2022-01-31 18:12:55,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 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 18:12:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 372 transitions. [2022-01-31 18:12:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 18:12:55,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:55,277 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:55,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:12:55,278 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:55,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1204852460, now seen corresponding path program 44 times [2022-01-31 18:12:55,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:55,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177574834] [2022-01-31 18:12:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:55,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:55,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:55,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:55,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:55,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:55,933 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 18:12:55,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177574834] [2022-01-31 18:12:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [177574834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:55,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:55,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:12:55,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224471464] [2022-01-31 18:12:55,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:55,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:12:55,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:12:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:12:55,934 INFO L87 Difference]: Start difference. First operand 326 states and 372 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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 18:12:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:57,296 INFO L93 Difference]: Finished difference Result 566 states and 660 transitions. [2022-01-31 18:12:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:12:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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 101 [2022-01-31 18:12:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:57,298 INFO L225 Difference]: With dead ends: 566 [2022-01-31 18:12:57,298 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 18:12:57,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:12:57,300 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 735 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:57,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 43 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:12:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 18:12:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2022-01-31 18:12:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 48 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 18:12:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 380 transitions. [2022-01-31 18:12:57,344 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 380 transitions. Word has length 101 [2022-01-31 18:12:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:57,344 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 380 transitions. [2022-01-31 18:12:57,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 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 18:12:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 380 transitions. [2022-01-31 18:12:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 18:12:57,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:57,345 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:57,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:12:57,345 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1929133366, now seen corresponding path program 45 times [2022-01-31 18:12:57,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570626588] [2022-01-31 18:12:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:57,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:57,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:57,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:57,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:58,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:12:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:12:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:12:58,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:12:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570626588] [2022-01-31 18:12:58,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570626588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:12:58,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:12:58,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:12:58,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424104626] [2022-01-31 18:12:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:12:58,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:12:58,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:12:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:12:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:12:58,042 INFO L87 Difference]: Start difference. First operand 333 states and 380 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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 18:12:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:12:59,447 INFO L93 Difference]: Finished difference Result 578 states and 674 transitions. [2022-01-31 18:12:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:12:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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 103 [2022-01-31 18:12:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:12:59,449 INFO L225 Difference]: With dead ends: 578 [2022-01-31 18:12:59,449 INFO L226 Difference]: Without dead ends: 342 [2022-01-31 18:12:59,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:12:59,450 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 701 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:12:59,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 48 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:12:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-31 18:12:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2022-01-31 18:12:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 288 states have internal predecessors, (291), 49 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-31 18:12:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2022-01-31 18:12:59,483 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 103 [2022-01-31 18:12:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:12:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2022-01-31 18:12:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 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 18:12:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2022-01-31 18:12:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 18:12:59,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:12:59,483 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:12:59,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:12:59,484 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:12:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:12:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1377529640, now seen corresponding path program 46 times [2022-01-31 18:12:59,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:12:59,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841378048] [2022-01-31 18:12:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:12:59,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:12:59,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:12:59,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:12:59,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:12:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:00,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:00,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:00,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841378048] [2022-01-31 18:13:00,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841378048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:00,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:00,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:13:00,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969360786] [2022-01-31 18:13:00,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:00,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:13:00,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:13:00,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:13:00,204 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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 18:13:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:01,637 INFO L93 Difference]: Finished difference Result 590 states and 688 transitions. [2022-01-31 18:13:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:13:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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 105 [2022-01-31 18:13:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:01,638 INFO L225 Difference]: With dead ends: 590 [2022-01-31 18:13:01,638 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 18:13:01,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:13:01,640 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 631 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:01,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 63 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 18:13:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2022-01-31 18:13:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 18:13:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 396 transitions. [2022-01-31 18:13:01,674 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 396 transitions. Word has length 105 [2022-01-31 18:13:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:01,675 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 396 transitions. [2022-01-31 18:13:01,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 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 18:13:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 396 transitions. [2022-01-31 18:13:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 18:13:01,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:01,675 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:01,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:13:01,675 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash 804879366, now seen corresponding path program 47 times [2022-01-31 18:13:01,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362975100] [2022-01-31 18:13:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:01,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:01,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:01,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:01,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:02,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:02,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362975100] [2022-01-31 18:13:02,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362975100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:02,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:02,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:13:02,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141031497] [2022-01-31 18:13:02,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:02,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:13:02,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:13:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:13:02,465 INFO L87 Difference]: Start difference. First operand 347 states and 396 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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 18:13:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:03,897 INFO L93 Difference]: Finished difference Result 602 states and 702 transitions. [2022-01-31 18:13:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:13:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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 107 [2022-01-31 18:13:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:03,899 INFO L225 Difference]: With dead ends: 602 [2022-01-31 18:13:03,899 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 18:13:03,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:13:03,901 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 585 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:03,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 63 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:13:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 18:13:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 354. [2022-01-31 18:13:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 300 states have (on average 1.01) internal successors, (303), 300 states have internal predecessors, (303), 51 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-31 18:13:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 404 transitions. [2022-01-31 18:13:03,935 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 404 transitions. Word has length 107 [2022-01-31 18:13:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:03,935 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 404 transitions. [2022-01-31 18:13:03,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 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 18:13:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 404 transitions. [2022-01-31 18:13:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 18:13:03,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:03,936 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:03,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:13:03,936 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash 243779940, now seen corresponding path program 48 times [2022-01-31 18:13:03,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192783807] [2022-01-31 18:13:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:03,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:03,938 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:03,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:03,940 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:04,724 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:04,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192783807] [2022-01-31 18:13:04,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1192783807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:04,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:04,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:13:04,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302606637] [2022-01-31 18:13:04,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:04,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:13:04,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:13:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:13:04,726 INFO L87 Difference]: Start difference. First operand 354 states and 404 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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 18:13:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:06,192 INFO L93 Difference]: Finished difference Result 614 states and 716 transitions. [2022-01-31 18:13:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:13:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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 109 [2022-01-31 18:13:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:06,194 INFO L225 Difference]: With dead ends: 614 [2022-01-31 18:13:06,194 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 18:13:06,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:13:06,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 800 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:06,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 38 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 18:13:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2022-01-31 18:13:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 52 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 18:13:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 412 transitions. [2022-01-31 18:13:06,259 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 412 transitions. Word has length 109 [2022-01-31 18:13:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 412 transitions. [2022-01-31 18:13:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 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 18:13:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 412 transitions. [2022-01-31 18:13:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 18:13:06,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:06,260 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:06,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:13:06,260 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2101856446, now seen corresponding path program 49 times [2022-01-31 18:13:06,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:06,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81007824] [2022-01-31 18:13:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:06,262 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:06,263 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:06,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:06,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:07,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:07,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81007824] [2022-01-31 18:13:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [81007824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:07,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:13:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789149003] [2022-01-31 18:13:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:07,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:13:07,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:13:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:13:07,081 INFO L87 Difference]: Start difference. First operand 361 states and 412 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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 18:13:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:08,555 INFO L93 Difference]: Finished difference Result 626 states and 730 transitions. [2022-01-31 18:13:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:13:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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 111 [2022-01-31 18:13:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:08,556 INFO L225 Difference]: With dead ends: 626 [2022-01-31 18:13:08,557 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 18:13:08,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:13:08,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 760 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:08,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 38 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:13:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 18:13:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2022-01-31 18:13:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 312 states have (on average 1.0096153846153846) internal successors, (315), 312 states have internal predecessors, (315), 53 states have call successors, (53), 3 states have call predecessors, (53), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 18:13:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 420 transitions. [2022-01-31 18:13:08,595 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 420 transitions. Word has length 111 [2022-01-31 18:13:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:08,595 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 420 transitions. [2022-01-31 18:13:08,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 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 18:13:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 420 transitions. [2022-01-31 18:13:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 18:13:08,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:08,596 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:08,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:13:08,596 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:08,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1400592992, now seen corresponding path program 50 times [2022-01-31 18:13:08,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:08,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943422235] [2022-01-31 18:13:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:08,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:08,598 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:08,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:08,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:09,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:09,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:09,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943422235] [2022-01-31 18:13:09,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943422235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:09,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:09,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:13:09,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469884561] [2022-01-31 18:13:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:09,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:13:09,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:13:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:13:09,438 INFO L87 Difference]: Start difference. First operand 368 states and 420 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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 18:13:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:11,018 INFO L93 Difference]: Finished difference Result 638 states and 744 transitions. [2022-01-31 18:13:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:13:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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 113 [2022-01-31 18:13:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:11,020 INFO L225 Difference]: With dead ends: 638 [2022-01-31 18:13:11,020 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 18:13:11,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:13:11,023 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 912 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:11,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 33 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 18:13:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-01-31 18:13:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 54 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-31 18:13:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 428 transitions. [2022-01-31 18:13:11,061 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 428 transitions. Word has length 113 [2022-01-31 18:13:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 428 transitions. [2022-01-31 18:13:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 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 18:13:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 428 transitions. [2022-01-31 18:13:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 18:13:11,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:11,062 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:13:11,062 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1796279170, now seen corresponding path program 51 times [2022-01-31 18:13:11,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:11,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572442257] [2022-01-31 18:13:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:11,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:11,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:11,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:11,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:11,933 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 18:13:11,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:11,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572442257] [2022-01-31 18:13:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [572442257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:11,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:11,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:13:11,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346782472] [2022-01-31 18:13:11,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:11,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:13:11,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:13:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:13:11,935 INFO L87 Difference]: Start difference. First operand 375 states and 428 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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 18:13:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:13,739 INFO L93 Difference]: Finished difference Result 650 states and 758 transitions. [2022-01-31 18:13:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:13:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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 115 [2022-01-31 18:13:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:13,741 INFO L225 Difference]: With dead ends: 650 [2022-01-31 18:13:13,741 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 18:13:13,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:13:13,742 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 857 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:13,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 43 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 18:13:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 382. [2022-01-31 18:13:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 324 states have (on average 1.0092592592592593) internal successors, (327), 324 states have internal predecessors, (327), 55 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 18:13:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 436 transitions. [2022-01-31 18:13:13,783 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 436 transitions. Word has length 115 [2022-01-31 18:13:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:13,783 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 436 transitions. [2022-01-31 18:13:13,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 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 18:13:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 436 transitions. [2022-01-31 18:13:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 18:13:13,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:13,784 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:13,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:13:13,784 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 201393116, now seen corresponding path program 52 times [2022-01-31 18:13:13,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257013107] [2022-01-31 18:13:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:13,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:13,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:13,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:13,789 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:14,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:14,727 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257013107] [2022-01-31 18:13:14,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257013107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:14,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:14,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:13:14,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888597322] [2022-01-31 18:13:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:14,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:13:14,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:13:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:13:14,729 INFO L87 Difference]: Start difference. First operand 382 states and 436 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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 18:13:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:16,529 INFO L93 Difference]: Finished difference Result 662 states and 772 transitions. [2022-01-31 18:13:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:13:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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 117 [2022-01-31 18:13:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:16,531 INFO L225 Difference]: With dead ends: 662 [2022-01-31 18:13:16,531 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 18:13:16,533 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 18:13:16,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 772 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:16,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 48 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 18:13:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2022-01-31 18:13:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 330 states have (on average 1.009090909090909) internal successors, (333), 330 states have internal predecessors, (333), 56 states have call successors, (56), 3 states have call predecessors, (56), 2 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-01-31 18:13:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 444 transitions. [2022-01-31 18:13:16,585 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 444 transitions. Word has length 117 [2022-01-31 18:13:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:16,585 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 444 transitions. [2022-01-31 18:13:16,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 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 18:13:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 444 transitions. [2022-01-31 18:13:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 18:13:16,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:16,586 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:16,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:13:16,586 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 114078650, now seen corresponding path program 53 times [2022-01-31 18:13:16,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:16,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724210857] [2022-01-31 18:13:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:16,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:16,589 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:16,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:16,591 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:17,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:17,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:17,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724210857] [2022-01-31 18:13:17,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724210857] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:17,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:17,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:13:17,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640706100] [2022-01-31 18:13:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:17,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:13:17,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:13:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:13:17,605 INFO L87 Difference]: Start difference. First operand 389 states and 444 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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 18:13:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:19,348 INFO L93 Difference]: Finished difference Result 674 states and 786 transitions. [2022-01-31 18:13:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:13:19,348 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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 119 [2022-01-31 18:13:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:19,350 INFO L225 Difference]: With dead ends: 674 [2022-01-31 18:13:19,350 INFO L226 Difference]: Without dead ends: 398 [2022-01-31 18:13:19,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:13:19,351 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 759 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:19,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 53 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-31 18:13:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2022-01-31 18:13:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 336 states have (on average 1.0089285714285714) internal successors, (339), 336 states have internal predecessors, (339), 57 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-01-31 18:13:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 452 transitions. [2022-01-31 18:13:19,402 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 452 transitions. Word has length 119 [2022-01-31 18:13:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:19,402 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 452 transitions. [2022-01-31 18:13:19,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 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 18:13:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 452 transitions. [2022-01-31 18:13:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 18:13:19,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:19,403 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:19,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:13:19,403 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2104222744, now seen corresponding path program 54 times [2022-01-31 18:13:19,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:19,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512814003] [2022-01-31 18:13:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:19,405 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:19,405 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:19,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:19,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:20,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:20,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512814003] [2022-01-31 18:13:20,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512814003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:20,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:20,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:13:20,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692718307] [2022-01-31 18:13:20,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:20,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:13:20,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:13:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:13:20,486 INFO L87 Difference]: Start difference. First operand 396 states and 452 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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 18:13:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:22,344 INFO L93 Difference]: Finished difference Result 686 states and 800 transitions. [2022-01-31 18:13:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:13:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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 121 [2022-01-31 18:13:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:22,346 INFO L225 Difference]: With dead ends: 686 [2022-01-31 18:13:22,346 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 18:13:22,348 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 18:13:22,348 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 941 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 661 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:22,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 33 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [661 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 18:13:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 403. [2022-01-31 18:13:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 342 states have internal predecessors, (345), 58 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 18:13:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 460 transitions. [2022-01-31 18:13:22,411 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 460 transitions. Word has length 121 [2022-01-31 18:13:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 460 transitions. [2022-01-31 18:13:22,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 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 18:13:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 460 transitions. [2022-01-31 18:13:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 18:13:22,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:22,412 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:22,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:13:22,412 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:22,413 INFO L85 PathProgramCache]: Analyzing trace with hash -922716938, now seen corresponding path program 55 times [2022-01-31 18:13:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:22,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834064750] [2022-01-31 18:13:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:22,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:22,414 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:22,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:22,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:23,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:23,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834064750] [2022-01-31 18:13:23,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [834064750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:23,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:23,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:13:23,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879809704] [2022-01-31 18:13:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:23,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:13:23,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:13:23,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:13:23,439 INFO L87 Difference]: Start difference. First operand 403 states and 460 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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 18:13:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:25,309 INFO L93 Difference]: Finished difference Result 698 states and 814 transitions. [2022-01-31 18:13:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:13:25,309 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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 123 [2022-01-31 18:13:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:25,311 INFO L225 Difference]: With dead ends: 698 [2022-01-31 18:13:25,311 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 18:13:25,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:13:25,313 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 925 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:25,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 33 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 18:13:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2022-01-31 18:13:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 348 states have (on average 1.0086206896551724) internal successors, (351), 348 states have internal predecessors, (351), 59 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-01-31 18:13:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 468 transitions. [2022-01-31 18:13:25,374 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 468 transitions. Word has length 123 [2022-01-31 18:13:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 468 transitions. [2022-01-31 18:13:25,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 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 18:13:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 468 transitions. [2022-01-31 18:13:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 18:13:25,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:25,374 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:25,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:13:25,375 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2118891948, now seen corresponding path program 56 times [2022-01-31 18:13:25,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:25,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578970082] [2022-01-31 18:13:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:25,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:25,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:25,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:25,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:26,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578970082] [2022-01-31 18:13:26,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [578970082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:26,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:26,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:13:26,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303046532] [2022-01-31 18:13:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:26,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:13:26,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:13:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:13:26,382 INFO L87 Difference]: Start difference. First operand 410 states and 468 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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 18:13:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:28,283 INFO L93 Difference]: Finished difference Result 710 states and 828 transitions. [2022-01-31 18:13:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:13:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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 125 [2022-01-31 18:13:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:28,285 INFO L225 Difference]: With dead ends: 710 [2022-01-31 18:13:28,285 INFO L226 Difference]: Without dead ends: 419 [2022-01-31 18:13:28,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:13:28,287 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 888 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:28,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 48 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:13:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-31 18:13:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 417. [2022-01-31 18:13:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 354 states have (on average 1.0084745762711864) internal successors, (357), 354 states have internal predecessors, (357), 60 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-01-31 18:13:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 476 transitions. [2022-01-31 18:13:28,333 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 476 transitions. Word has length 125 [2022-01-31 18:13:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:28,333 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 476 transitions. [2022-01-31 18:13:28,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 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 18:13:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 476 transitions. [2022-01-31 18:13:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 18:13:28,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:28,334 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:28,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:13:28,334 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -591841230, now seen corresponding path program 57 times [2022-01-31 18:13:28,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120693428] [2022-01-31 18:13:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:28,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:28,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:28,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:28,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:29,374 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120693428] [2022-01-31 18:13:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [120693428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:29,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:13:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588273490] [2022-01-31 18:13:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:13:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:13:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:13:29,376 INFO L87 Difference]: Start difference. First operand 417 states and 476 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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 18:13:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:31,345 INFO L93 Difference]: Finished difference Result 722 states and 842 transitions. [2022-01-31 18:13:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:13:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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 127 [2022-01-31 18:13:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:31,348 INFO L225 Difference]: With dead ends: 722 [2022-01-31 18:13:31,348 INFO L226 Difference]: Without dead ends: 426 [2022-01-31 18:13:31,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:13:31,349 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 959 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:31,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 43 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-31 18:13:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2022-01-31 18:13:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 360 states have (on average 1.0083333333333333) internal successors, (363), 360 states have internal predecessors, (363), 61 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-31 18:13:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 484 transitions. [2022-01-31 18:13:31,397 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 484 transitions. Word has length 127 [2022-01-31 18:13:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 484 transitions. [2022-01-31 18:13:31,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 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 18:13:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 484 transitions. [2022-01-31 18:13:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 18:13:31,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:31,398 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:31,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:13:31,398 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1974916464, now seen corresponding path program 58 times [2022-01-31 18:13:31,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:31,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903262823] [2022-01-31 18:13:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:31,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:31,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:31,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:31,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:32,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:32,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:32,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903262823] [2022-01-31 18:13:32,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [903262823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:32,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:32,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:13:32,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114695177] [2022-01-31 18:13:32,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:32,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:13:32,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:13:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:13:32,727 INFO L87 Difference]: Start difference. First operand 424 states and 484 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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 18:13:34,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:34,776 INFO L93 Difference]: Finished difference Result 734 states and 856 transitions. [2022-01-31 18:13:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:13:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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 129 [2022-01-31 18:13:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:34,787 INFO L225 Difference]: With dead ends: 734 [2022-01-31 18:13:34,787 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 18:13:34,788 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 18:13:34,788 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 973 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:34,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [974 Valid, 48 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 18:13:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2022-01-31 18:13:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 366 states have (on average 1.0081967213114753) internal successors, (369), 366 states have internal predecessors, (369), 62 states have call successors, (62), 3 states have call predecessors, (62), 2 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-31 18:13:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 492 transitions. [2022-01-31 18:13:34,839 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 492 transitions. Word has length 129 [2022-01-31 18:13:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:34,839 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 492 transitions. [2022-01-31 18:13:34,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 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 18:13:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 492 transitions. [2022-01-31 18:13:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 18:13:34,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:34,840 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:34,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:13:34,840 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash 329645422, now seen corresponding path program 59 times [2022-01-31 18:13:34,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:34,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698559361] [2022-01-31 18:13:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:34,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:34,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:34,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:34,844 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:35,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:35,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:35,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698559361] [2022-01-31 18:13:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [698559361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:35,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:35,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:13:35,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407248373] [2022-01-31 18:13:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:35,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:13:35,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:35,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:13:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:13:35,969 INFO L87 Difference]: Start difference. First operand 431 states and 492 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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 18:13:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:38,060 INFO L93 Difference]: Finished difference Result 746 states and 870 transitions. [2022-01-31 18:13:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:13:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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 131 [2022-01-31 18:13:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:38,062 INFO L225 Difference]: With dead ends: 746 [2022-01-31 18:13:38,062 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 18:13:38,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:13:38,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1008 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:38,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 28 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 18:13:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 438. [2022-01-31 18:13:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 372 states have (on average 1.0080645161290323) internal successors, (375), 372 states have internal predecessors, (375), 63 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-01-31 18:13:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 500 transitions. [2022-01-31 18:13:38,114 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 500 transitions. Word has length 131 [2022-01-31 18:13:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:38,114 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 500 transitions. [2022-01-31 18:13:38,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 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 18:13:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 500 transitions. [2022-01-31 18:13:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 18:13:38,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:38,114 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:38,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:13:38,115 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:38,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1189506868, now seen corresponding path program 60 times [2022-01-31 18:13:38,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:38,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900549694] [2022-01-31 18:13:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:38,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:38,116 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:38,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:38,119 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:39,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:39,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900549694] [2022-01-31 18:13:39,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [900549694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:39,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:39,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:13:39,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451761688] [2022-01-31 18:13:39,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:39,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:13:39,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:13:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:13:39,270 INFO L87 Difference]: Start difference. First operand 438 states and 500 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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 18:13:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:41,433 INFO L93 Difference]: Finished difference Result 758 states and 884 transitions. [2022-01-31 18:13:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:13:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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 133 [2022-01-31 18:13:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:41,436 INFO L225 Difference]: With dead ends: 758 [2022-01-31 18:13:41,436 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 18:13:41,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:13:41,438 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1055 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:41,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 33 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 18:13:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2022-01-31 18:13:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 378 states have (on average 1.007936507936508) internal successors, (381), 378 states have internal predecessors, (381), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 18:13:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 508 transitions. [2022-01-31 18:13:41,495 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 508 transitions. Word has length 133 [2022-01-31 18:13:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:41,496 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 508 transitions. [2022-01-31 18:13:41,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 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 18:13:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 508 transitions. [2022-01-31 18:13:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 18:13:41,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:41,496 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:41,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:13:41,497 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -805976918, now seen corresponding path program 61 times [2022-01-31 18:13:41,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:41,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123843810] [2022-01-31 18:13:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:41,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:41,498 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:41,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:41,501 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:42,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:42,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123843810] [2022-01-31 18:13:42,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123843810] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:42,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:42,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:13:42,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359656654] [2022-01-31 18:13:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:42,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:13:42,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:13:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:13:42,718 INFO L87 Difference]: Start difference. First operand 445 states and 508 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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 18:13:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:44,983 INFO L93 Difference]: Finished difference Result 770 states and 898 transitions. [2022-01-31 18:13:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:13:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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 135 [2022-01-31 18:13:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:44,984 INFO L225 Difference]: With dead ends: 770 [2022-01-31 18:13:44,984 INFO L226 Difference]: Without dead ends: 454 [2022-01-31 18:13:44,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:13:44,986 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 868 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:44,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 53 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-31 18:13:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 452. [2022-01-31 18:13:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 384 states have (on average 1.0078125) internal successors, (387), 384 states have internal predecessors, (387), 65 states have call successors, (65), 3 states have call predecessors, (65), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 18:13:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 516 transitions. [2022-01-31 18:13:45,039 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 516 transitions. Word has length 135 [2022-01-31 18:13:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 516 transitions. [2022-01-31 18:13:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 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 18:13:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 516 transitions. [2022-01-31 18:13:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 18:13:45,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:45,040 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:45,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:13:45,040 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1600882424, now seen corresponding path program 62 times [2022-01-31 18:13:45,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906156663] [2022-01-31 18:13:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:45,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:45,042 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:45,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:45,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:46,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:46,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:46,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906156663] [2022-01-31 18:13:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [906156663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:46,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:13:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490942979] [2022-01-31 18:13:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:13:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:13:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:13:46,361 INFO L87 Difference]: Start difference. First operand 452 states and 516 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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 18:13:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:48,710 INFO L93 Difference]: Finished difference Result 782 states and 912 transitions. [2022-01-31 18:13:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:13:48,710 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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 137 [2022-01-31 18:13:48,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:48,712 INFO L225 Difference]: With dead ends: 782 [2022-01-31 18:13:48,712 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 18:13:48,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:13:48,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 906 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:48,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 48 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [643 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 18:13:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2022-01-31 18:13:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 66 states have call successors, (66), 3 states have call predecessors, (66), 2 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-01-31 18:13:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 524 transitions. [2022-01-31 18:13:48,778 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 524 transitions. Word has length 137 [2022-01-31 18:13:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:48,779 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 524 transitions. [2022-01-31 18:13:48,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 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 18:13:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 524 transitions. [2022-01-31 18:13:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 18:13:48,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:48,779 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:13:48,780 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:48,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1000895002, now seen corresponding path program 63 times [2022-01-31 18:13:48,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:48,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055983403] [2022-01-31 18:13:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:48,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:48,781 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:48,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:48,784 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:50,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:50,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:50,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055983403] [2022-01-31 18:13:50,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055983403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:50,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:50,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:13:50,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615657941] [2022-01-31 18:13:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:50,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:13:50,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:13:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:13:50,047 INFO L87 Difference]: Start difference. First operand 459 states and 524 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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 18:13:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:52,382 INFO L93 Difference]: Finished difference Result 794 states and 926 transitions. [2022-01-31 18:13:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:13:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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 139 [2022-01-31 18:13:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:52,384 INFO L225 Difference]: With dead ends: 794 [2022-01-31 18:13:52,384 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 18:13:52,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:13:52,386 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 992 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:52,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 48 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 18:13:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 466. [2022-01-31 18:13:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 396 states have (on average 1.0075757575757576) internal successors, (399), 396 states have internal predecessors, (399), 67 states have call successors, (67), 3 states have call predecessors, (67), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 18:13:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 532 transitions. [2022-01-31 18:13:52,463 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 532 transitions. Word has length 139 [2022-01-31 18:13:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:52,463 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 532 transitions. [2022-01-31 18:13:52,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 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 18:13:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 532 transitions. [2022-01-31 18:13:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 18:13:52,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:52,464 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:52,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:13:52,464 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash 61399876, now seen corresponding path program 64 times [2022-01-31 18:13:52,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705631254] [2022-01-31 18:13:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:52,465 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:52,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:52,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:52,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:53,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:53,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705631254] [2022-01-31 18:13:53,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [705631254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:53,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:53,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:13:53,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621706437] [2022-01-31 18:13:53,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:53,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:13:53,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:13:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:13:53,774 INFO L87 Difference]: Start difference. First operand 466 states and 532 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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 18:13:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:56,117 INFO L93 Difference]: Finished difference Result 806 states and 940 transitions. [2022-01-31 18:13:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:13:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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 141 [2022-01-31 18:13:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:56,119 INFO L225 Difference]: With dead ends: 806 [2022-01-31 18:13:56,119 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 18:13:56,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:13:56,121 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:56,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 38 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 18:13:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 473. [2022-01-31 18:13:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 402 states have (on average 1.007462686567164) internal successors, (405), 402 states have internal predecessors, (405), 68 states have call successors, (68), 3 states have call predecessors, (68), 2 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-01-31 18:13:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 540 transitions. [2022-01-31 18:13:56,188 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 540 transitions. Word has length 141 [2022-01-31 18:13:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:13:56,188 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 540 transitions. [2022-01-31 18:13:56,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 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 18:13:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 540 transitions. [2022-01-31 18:13:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 18:13:56,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:13:56,189 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:13:56,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:13:56,189 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:13:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:13:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1275438814, now seen corresponding path program 65 times [2022-01-31 18:13:56,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:13:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124457396] [2022-01-31 18:13:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:13:56,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:13:56,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:13:56,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:13:56,194 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:13:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:57,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:13:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:13:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:13:57,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:13:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124457396] [2022-01-31 18:13:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [124457396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:13:57,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:13:57,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:13:57,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298544972] [2022-01-31 18:13:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:13:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:13:57,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:13:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:13:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:13:57,486 INFO L87 Difference]: Start difference. First operand 473 states and 540 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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 18:13:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:13:59,931 INFO L93 Difference]: Finished difference Result 818 states and 954 transitions. [2022-01-31 18:13:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:13:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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 143 [2022-01-31 18:13:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:13:59,933 INFO L225 Difference]: With dead ends: 818 [2022-01-31 18:13:59,933 INFO L226 Difference]: Without dead ends: 482 [2022-01-31 18:13:59,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:13:59,935 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1245 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:13:59,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 33 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:13:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-31 18:14:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2022-01-31 18:14:00,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 408 states have (on average 1.0073529411764706) internal successors, (411), 408 states have internal predecessors, (411), 69 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 18:14:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 548 transitions. [2022-01-31 18:14:00,003 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 548 transitions. Word has length 143 [2022-01-31 18:14:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:00,003 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 548 transitions. [2022-01-31 18:14:00,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 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 18:14:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 548 transitions. [2022-01-31 18:14:00,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 18:14:00,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:00,004 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:00,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:14:00,004 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1782198400, now seen corresponding path program 66 times [2022-01-31 18:14:00,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496650369] [2022-01-31 18:14:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:00,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:00,006 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:00,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:00,009 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:01,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:01,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496650369] [2022-01-31 18:14:01,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496650369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:01,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:01,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:14:01,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030559567] [2022-01-31 18:14:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:01,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:14:01,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:14:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:14:01,379 INFO L87 Difference]: Start difference. First operand 480 states and 548 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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 18:14:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:03,969 INFO L93 Difference]: Finished difference Result 830 states and 968 transitions. [2022-01-31 18:14:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:14:03,970 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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 145 [2022-01-31 18:14:03,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:03,971 INFO L225 Difference]: With dead ends: 830 [2022-01-31 18:14:03,971 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 18:14:03,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:14:03,973 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1019 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:03,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 43 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 18:14:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2022-01-31 18:14:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 414 states have (on average 1.0072463768115942) internal successors, (417), 414 states have internal predecessors, (417), 70 states have call successors, (70), 3 states have call predecessors, (70), 2 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 18:14:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 556 transitions. [2022-01-31 18:14:04,043 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 556 transitions. Word has length 145 [2022-01-31 18:14:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:04,044 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 556 transitions. [2022-01-31 18:14:04,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 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 18:14:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 556 transitions. [2022-01-31 18:14:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 18:14:04,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:04,044 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:04,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:14:04,045 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:04,045 INFO L85 PathProgramCache]: Analyzing trace with hash 848111198, now seen corresponding path program 67 times [2022-01-31 18:14:04,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:04,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833007441] [2022-01-31 18:14:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:04,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:04,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:04,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:04,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:05,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:05,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833007441] [2022-01-31 18:14:05,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833007441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:05,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:05,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:14:05,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36589265] [2022-01-31 18:14:05,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:05,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:14:05,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:14:05,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:14:05,457 INFO L87 Difference]: Start difference. First operand 487 states and 556 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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 18:14:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,995 INFO L93 Difference]: Finished difference Result 842 states and 982 transitions. [2022-01-31 18:14:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:14:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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 147 [2022-01-31 18:14:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:08,002 INFO L225 Difference]: With dead ends: 842 [2022-01-31 18:14:08,002 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 18:14:08,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:14:08,004 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1186 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:08,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 33 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 18:14:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2022-01-31 18:14:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 420 states have (on average 1.0071428571428571) internal successors, (423), 420 states have internal predecessors, (423), 71 states have call successors, (71), 3 states have call predecessors, (71), 2 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-31 18:14:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 564 transitions. [2022-01-31 18:14:08,074 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 564 transitions. Word has length 147 [2022-01-31 18:14:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:08,075 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 564 transitions. [2022-01-31 18:14:08,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 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 18:14:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 564 transitions. [2022-01-31 18:14:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 18:14:08,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:08,076 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:08,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:14:08,076 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1160102468, now seen corresponding path program 68 times [2022-01-31 18:14:08,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:08,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133629493] [2022-01-31 18:14:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:08,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:08,077 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:08,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:08,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:09,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133629493] [2022-01-31 18:14:09,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133629493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:09,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:09,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:14:09,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145624139] [2022-01-31 18:14:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:09,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:14:09,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:14:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:14:09,498 INFO L87 Difference]: Start difference. First operand 494 states and 564 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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 18:14:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:12,081 INFO L93 Difference]: Finished difference Result 854 states and 996 transitions. [2022-01-31 18:14:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:14:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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 149 [2022-01-31 18:14:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:12,083 INFO L225 Difference]: With dead ends: 854 [2022-01-31 18:14:12,083 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 18:14:12,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:14:12,084 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1035 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:12,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 53 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:14:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 18:14:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2022-01-31 18:14:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 426 states have (on average 1.0070422535211268) internal successors, (429), 426 states have internal predecessors, (429), 72 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 18:14:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 572 transitions. [2022-01-31 18:14:12,148 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 572 transitions. Word has length 149 [2022-01-31 18:14:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:12,148 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 572 transitions. [2022-01-31 18:14:12,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 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 18:14:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 572 transitions. [2022-01-31 18:14:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 18:14:12,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:12,149 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:12,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:14:12,149 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1681847706, now seen corresponding path program 69 times [2022-01-31 18:14:12,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:12,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540766031] [2022-01-31 18:14:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:12,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:12,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:12,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:12,153 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:13,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540766031] [2022-01-31 18:14:13,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [540766031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:13,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:13,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:14:13,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765781123] [2022-01-31 18:14:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:13,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:14:13,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:14:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:14:13,651 INFO L87 Difference]: Start difference. First operand 501 states and 572 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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 18:14:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:16,412 INFO L93 Difference]: Finished difference Result 866 states and 1010 transitions. [2022-01-31 18:14:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:14:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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 151 [2022-01-31 18:14:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:16,414 INFO L225 Difference]: With dead ends: 866 [2022-01-31 18:14:16,414 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 18:14:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:14:16,416 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1094 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:16,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 43 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 18:14:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2022-01-31 18:14:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 432 states have (on average 1.0069444444444444) internal successors, (435), 432 states have internal predecessors, (435), 73 states have call successors, (73), 3 states have call predecessors, (73), 2 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-01-31 18:14:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 580 transitions. [2022-01-31 18:14:16,491 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 580 transitions. Word has length 151 [2022-01-31 18:14:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:16,491 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 580 transitions. [2022-01-31 18:14:16,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 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 18:14:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 580 transitions. [2022-01-31 18:14:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 18:14:16,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:16,492 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:16,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:14:16,492 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1196764664, now seen corresponding path program 70 times [2022-01-31 18:14:16,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596662023] [2022-01-31 18:14:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:16,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:16,493 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:16,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:16,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,047 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596662023] [2022-01-31 18:14:18,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [596662023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:14:18,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824634647] [2022-01-31 18:14:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:14:18,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:14:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:14:18,049 INFO L87 Difference]: Start difference. First operand 508 states and 580 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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 18:14:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,894 INFO L93 Difference]: Finished difference Result 878 states and 1024 transitions. [2022-01-31 18:14:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:14:20,895 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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 153 [2022-01-31 18:14:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,896 INFO L225 Difference]: With dead ends: 878 [2022-01-31 18:14:20,896 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 18:14:20,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:14:20,898 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1501 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 33 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 18:14:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 515. [2022-01-31 18:14:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 438 states have (on average 1.0068493150684932) internal successors, (441), 438 states have internal predecessors, (441), 74 states have call successors, (74), 3 states have call predecessors, (74), 2 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-01-31 18:14:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 588 transitions. [2022-01-31 18:14:20,967 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 588 transitions. Word has length 153 [2022-01-31 18:14:20,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,967 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 588 transitions. [2022-01-31 18:14:20,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 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 18:14:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 588 transitions. [2022-01-31 18:14:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 18:14:20,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,968 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:14:20,968 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1111570730, now seen corresponding path program 71 times [2022-01-31 18:14:20,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332898009] [2022-01-31 18:14:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:20,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:22,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:22,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332898009] [2022-01-31 18:14:22,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [332898009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:22,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:22,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:14:22,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216000874] [2022-01-31 18:14:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:22,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:14:22,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:14:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:14:22,551 INFO L87 Difference]: Start difference. First operand 515 states and 588 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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 18:14:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:25,456 INFO L93 Difference]: Finished difference Result 890 states and 1038 transitions. [2022-01-31 18:14:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:14:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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 155 [2022-01-31 18:14:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:25,459 INFO L225 Difference]: With dead ends: 890 [2022-01-31 18:14:25,459 INFO L226 Difference]: Without dead ends: 524 [2022-01-31 18:14:25,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:14:25,460 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1290 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:25,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 38 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-31 18:14:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2022-01-31 18:14:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 444 states have (on average 1.0067567567567568) internal successors, (447), 444 states have internal predecessors, (447), 75 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-01-31 18:14:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 596 transitions. [2022-01-31 18:14:25,546 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 596 transitions. Word has length 155 [2022-01-31 18:14:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:25,546 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 596 transitions. [2022-01-31 18:14:25,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 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 18:14:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 596 transitions. [2022-01-31 18:14:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 18:14:25,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:25,547 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:25,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:14:25,547 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1076207668, now seen corresponding path program 72 times [2022-01-31 18:14:25,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:25,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421006951] [2022-01-31 18:14:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:25,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:25,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:25,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:25,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:27,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:27,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421006951] [2022-01-31 18:14:27,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421006951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:27,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:27,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:14:27,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908405993] [2022-01-31 18:14:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:27,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:14:27,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:14:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:14:27,144 INFO L87 Difference]: Start difference. First operand 522 states and 596 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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 18:14:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:30,083 INFO L93 Difference]: Finished difference Result 902 states and 1052 transitions. [2022-01-31 18:14:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:14:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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 157 [2022-01-31 18:14:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:30,085 INFO L225 Difference]: With dead ends: 902 [2022-01-31 18:14:30,085 INFO L226 Difference]: Without dead ends: 531 [2022-01-31 18:14:30,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:14:30,086 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1397 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:30,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1398 Valid, 43 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-31 18:14:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 529. [2022-01-31 18:14:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 450 states have (on average 1.0066666666666666) internal successors, (453), 450 states have internal predecessors, (453), 76 states have call successors, (76), 3 states have call predecessors, (76), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-01-31 18:14:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 604 transitions. [2022-01-31 18:14:30,157 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 604 transitions. Word has length 157 [2022-01-31 18:14:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:30,157 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 604 transitions. [2022-01-31 18:14:30,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 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 18:14:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 604 transitions. [2022-01-31 18:14:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 18:14:30,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:30,158 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:30,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:14:30,158 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1002726894, now seen corresponding path program 73 times [2022-01-31 18:14:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:30,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452093470] [2022-01-31 18:14:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:30,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:30,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:30,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:30,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,840 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 18:14:31,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452093470] [2022-01-31 18:14:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452093470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:14:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611474395] [2022-01-31 18:14:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:31,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:14:31,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:14:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:14:31,843 INFO L87 Difference]: Start difference. First operand 529 states and 604 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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 18:14:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:34,898 INFO L93 Difference]: Finished difference Result 914 states and 1066 transitions. [2022-01-31 18:14:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:14:34,898 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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 159 [2022-01-31 18:14:34,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:34,900 INFO L225 Difference]: With dead ends: 914 [2022-01-31 18:14:34,900 INFO L226 Difference]: Without dead ends: 538 [2022-01-31 18:14:34,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:14:34,902 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1084 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:34,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 58 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-31 18:14:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2022-01-31 18:14:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 456 states have (on average 1.006578947368421) internal successors, (459), 456 states have internal predecessors, (459), 77 states have call successors, (77), 3 states have call predecessors, (77), 2 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-01-31 18:14:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 612 transitions. [2022-01-31 18:14:34,984 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 612 transitions. Word has length 159 [2022-01-31 18:14:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:34,984 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 612 transitions. [2022-01-31 18:14:34,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 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 18:14:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 612 transitions. [2022-01-31 18:14:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 18:14:34,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:34,985 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:34,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:14:34,985 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1699048336, now seen corresponding path program 74 times [2022-01-31 18:14:34,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:34,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915053024] [2022-01-31 18:14:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:34,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:34,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:34,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:34,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:36,633 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 18:14:36,633 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915053024] [2022-01-31 18:14:36,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915053024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:36,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:36,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:14:36,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498158183] [2022-01-31 18:14:36,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:36,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:14:36,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:14:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:14:36,635 INFO L87 Difference]: Start difference. First operand 536 states and 612 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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 18:14:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:39,731 INFO L93 Difference]: Finished difference Result 926 states and 1080 transitions. [2022-01-31 18:14:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:14:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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 161 [2022-01-31 18:14:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:39,733 INFO L225 Difference]: With dead ends: 926 [2022-01-31 18:14:39,733 INFO L226 Difference]: Without dead ends: 545 [2022-01-31 18:14:39,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:14:39,735 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1095 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:39,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 53 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-31 18:14:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 543. [2022-01-31 18:14:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 462 states have (on average 1.0064935064935066) internal successors, (465), 462 states have internal predecessors, (465), 78 states have call successors, (78), 3 states have call predecessors, (78), 2 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 18:14:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 620 transitions. [2022-01-31 18:14:39,809 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 620 transitions. Word has length 161 [2022-01-31 18:14:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 620 transitions. [2022-01-31 18:14:39,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 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 18:14:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 620 transitions. [2022-01-31 18:14:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 18:14:39,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:39,810 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:39,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:14:39,810 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash -849055922, now seen corresponding path program 75 times [2022-01-31 18:14:39,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:39,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949634357] [2022-01-31 18:14:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:39,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:39,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:39,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:39,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,518 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 18:14:41,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949634357] [2022-01-31 18:14:41,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949634357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:41,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:41,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:14:41,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033314606] [2022-01-31 18:14:41,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:41,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:14:41,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:14:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:14:41,520 INFO L87 Difference]: Start difference. First operand 543 states and 620 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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 18:14:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:44,780 INFO L93 Difference]: Finished difference Result 938 states and 1094 transitions. [2022-01-31 18:14:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:14:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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 163 [2022-01-31 18:14:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:44,782 INFO L225 Difference]: With dead ends: 938 [2022-01-31 18:14:44,782 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 18:14:44,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:14:44,784 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1214 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:44,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 38 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 18:14:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2022-01-31 18:14:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 468 states have (on average 1.0064102564102564) internal successors, (471), 468 states have internal predecessors, (471), 79 states have call successors, (79), 3 states have call predecessors, (79), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 18:14:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 628 transitions. [2022-01-31 18:14:44,864 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 628 transitions. Word has length 163 [2022-01-31 18:14:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:44,864 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 628 transitions. [2022-01-31 18:14:44,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 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 18:14:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 628 transitions. [2022-01-31 18:14:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 18:14:44,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:44,865 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:44,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:14:44,865 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -50132308, now seen corresponding path program 76 times [2022-01-31 18:14:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340572121] [2022-01-31 18:14:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:44,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:44,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:44,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:44,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:46,633 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 18:14:46,634 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340572121] [2022-01-31 18:14:46,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340572121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:46,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:46,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:14:46,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135784414] [2022-01-31 18:14:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:46,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:14:46,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:14:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:14:46,636 INFO L87 Difference]: Start difference. First operand 550 states and 628 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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 18:14:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:49,923 INFO L93 Difference]: Finished difference Result 950 states and 1108 transitions. [2022-01-31 18:14:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:14:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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 165 [2022-01-31 18:14:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:49,926 INFO L225 Difference]: With dead ends: 950 [2022-01-31 18:14:49,926 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 18:14:49,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:14:49,928 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1270 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 896 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 896 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:49,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 43 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [896 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:14:49,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 18:14:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 557. [2022-01-31 18:14:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 80 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 18:14:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 636 transitions. [2022-01-31 18:14:50,006 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 636 transitions. Word has length 165 [2022-01-31 18:14:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:50,006 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 636 transitions. [2022-01-31 18:14:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 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 18:14:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 636 transitions. [2022-01-31 18:14:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 18:14:50,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:50,007 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:50,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:14:50,007 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1083685238, now seen corresponding path program 77 times [2022-01-31 18:14:50,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440093096] [2022-01-31 18:14:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:50,009 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:50,009 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:50,013 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:51,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:51,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:51,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440093096] [2022-01-31 18:14:51,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440093096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:51,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:51,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:14:51,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096700382] [2022-01-31 18:14:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:51,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:14:51,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:14:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:14:51,839 INFO L87 Difference]: Start difference. First operand 557 states and 636 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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 18:14:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:55,280 INFO L93 Difference]: Finished difference Result 962 states and 1122 transitions. [2022-01-31 18:14:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:14:55,281 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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 167 [2022-01-31 18:14:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:55,282 INFO L225 Difference]: With dead ends: 962 [2022-01-31 18:14:55,282 INFO L226 Difference]: Without dead ends: 566 [2022-01-31 18:14:55,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:14:55,285 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1239 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:55,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 38 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [875 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:14:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-31 18:14:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 564. [2022-01-31 18:14:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 480 states have (on average 1.00625) internal successors, (483), 480 states have internal predecessors, (483), 81 states have call successors, (81), 3 states have call predecessors, (81), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 18:14:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 644 transitions. [2022-01-31 18:14:55,376 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 644 transitions. Word has length 167 [2022-01-31 18:14:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:55,376 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 644 transitions. [2022-01-31 18:14:55,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 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 18:14:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 644 transitions. [2022-01-31 18:14:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 18:14:55,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:55,377 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:55,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:14:55,377 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2104361704, now seen corresponding path program 78 times [2022-01-31 18:14:55,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:55,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650428591] [2022-01-31 18:14:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:55,379 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:55,379 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:14:55,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:55,382 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:57,204 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650428591] [2022-01-31 18:14:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650428591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:57,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:57,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:14:57,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419945048] [2022-01-31 18:14:57,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:14:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:14:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:14:57,206 INFO L87 Difference]: Start difference. First operand 564 states and 644 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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 18:15:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:00,666 INFO L93 Difference]: Finished difference Result 974 states and 1136 transitions. [2022-01-31 18:15:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:15:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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 169 [2022-01-31 18:15:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:00,668 INFO L225 Difference]: With dead ends: 974 [2022-01-31 18:15:00,668 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:15:00,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:15:00,671 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1190 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:00,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 58 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:15:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2022-01-31 18:15:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 486 states have (on average 1.0061728395061729) internal successors, (489), 486 states have internal predecessors, (489), 82 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 18:15:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 652 transitions. [2022-01-31 18:15:00,755 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 652 transitions. Word has length 169 [2022-01-31 18:15:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:00,755 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 652 transitions. [2022-01-31 18:15:00,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 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 18:15:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 652 transitions. [2022-01-31 18:15:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 18:15:00,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:00,756 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:00,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:15:00,756 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash -789176378, now seen corresponding path program 79 times [2022-01-31 18:15:00,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:00,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448442482] [2022-01-31 18:15:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:00,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:00,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:00,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:00,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:02,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:02,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448442482] [2022-01-31 18:15:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448442482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:02,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:02,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:15:02,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910947461] [2022-01-31 18:15:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:02,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:15:02,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:15:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:15:02,768 INFO L87 Difference]: Start difference. First operand 571 states and 652 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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 18:15:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:06,438 INFO L93 Difference]: Finished difference Result 986 states and 1150 transitions. [2022-01-31 18:15:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:15:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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 171 [2022-01-31 18:15:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:06,441 INFO L225 Difference]: With dead ends: 986 [2022-01-31 18:15:06,441 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 18:15:06,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:15:06,443 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1546 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:06,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1547 Valid, 28 Invalid, 1945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1082 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 18:15:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2022-01-31 18:15:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 492 states have (on average 1.0060975609756098) internal successors, (495), 492 states have internal predecessors, (495), 83 states have call successors, (83), 3 states have call predecessors, (83), 2 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 18:15:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 660 transitions. [2022-01-31 18:15:06,527 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 660 transitions. Word has length 171 [2022-01-31 18:15:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 660 transitions. [2022-01-31 18:15:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 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 18:15:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 660 transitions. [2022-01-31 18:15:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 18:15:06,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:06,528 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:06,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:15:06,528 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1659534628, now seen corresponding path program 80 times [2022-01-31 18:15:06,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:06,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758433030] [2022-01-31 18:15:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:06,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:06,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:06,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:06,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:08,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:08,469 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758433030] [2022-01-31 18:15:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758433030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:08,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:08,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:15:08,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397947444] [2022-01-31 18:15:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:15:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:15:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:15:08,471 INFO L87 Difference]: Start difference. First operand 578 states and 660 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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 18:15:12,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:12,109 INFO L93 Difference]: Finished difference Result 998 states and 1164 transitions. [2022-01-31 18:15:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:15:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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 173 [2022-01-31 18:15:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:12,111 INFO L225 Difference]: With dead ends: 998 [2022-01-31 18:15:12,111 INFO L226 Difference]: Without dead ends: 587 [2022-01-31 18:15:12,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:15:12,114 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1521 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 1066 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1066 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 28 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1066 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-31 18:15:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2022-01-31 18:15:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 498 states have (on average 1.0060240963855422) internal successors, (501), 498 states have internal predecessors, (501), 84 states have call successors, (84), 3 states have call predecessors, (84), 2 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 18:15:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 668 transitions. [2022-01-31 18:15:12,215 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 668 transitions. Word has length 173 [2022-01-31 18:15:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:12,215 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 668 transitions. [2022-01-31 18:15:12,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 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 18:15:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 668 transitions. [2022-01-31 18:15:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 18:15:12,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:12,216 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:12,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:15:12,216 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1228733186, now seen corresponding path program 81 times [2022-01-31 18:15:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460408567] [2022-01-31 18:15:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:12,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:12,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:12,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:12,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:14,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460408567] [2022-01-31 18:15:14,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460408567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:14,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:14,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:15:14,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860341548] [2022-01-31 18:15:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:15:14,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:15:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:15:14,253 INFO L87 Difference]: Start difference. First operand 585 states and 668 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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 18:15:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:18,347 INFO L93 Difference]: Finished difference Result 1010 states and 1178 transitions. [2022-01-31 18:15:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:15:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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 175 [2022-01-31 18:15:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:18,350 INFO L225 Difference]: With dead ends: 1010 [2022-01-31 18:15:18,350 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 18:15:18,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:15:18,352 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1364 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 53 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [964 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 18:15:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 592. [2022-01-31 18:15:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 504 states have (on average 1.005952380952381) internal successors, (507), 504 states have internal predecessors, (507), 85 states have call successors, (85), 3 states have call predecessors, (85), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-01-31 18:15:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 676 transitions. [2022-01-31 18:15:18,455 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 676 transitions. Word has length 175 [2022-01-31 18:15:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:18,455 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 676 transitions. [2022-01-31 18:15:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 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 18:15:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 676 transitions. [2022-01-31 18:15:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 18:15:18,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:18,456 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:18,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:15:18,456 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash -454592160, now seen corresponding path program 82 times [2022-01-31 18:15:18,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:18,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301627184] [2022-01-31 18:15:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:18,458 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:18,458 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:18,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:18,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:20,579 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301627184] [2022-01-31 18:15:20,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301627184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:20,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:20,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:15:20,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732824958] [2022-01-31 18:15:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:20,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:15:20,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:15:20,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:15:20,582 INFO L87 Difference]: Start difference. First operand 592 states and 676 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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 18:15:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:24,330 INFO L93 Difference]: Finished difference Result 1022 states and 1192 transitions. [2022-01-31 18:15:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:15:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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 177 [2022-01-31 18:15:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:24,332 INFO L225 Difference]: With dead ends: 1022 [2022-01-31 18:15:24,332 INFO L226 Difference]: Without dead ends: 601 [2022-01-31 18:15:24,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:15:24,334 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1333 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:24,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 43 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-31 18:15:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 599. [2022-01-31 18:15:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 510 states have (on average 1.0058823529411764) internal successors, (513), 510 states have internal predecessors, (513), 86 states have call successors, (86), 3 states have call predecessors, (86), 2 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 18:15:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 684 transitions. [2022-01-31 18:15:24,425 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 684 transitions. Word has length 177 [2022-01-31 18:15:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:24,425 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 684 transitions. [2022-01-31 18:15:24,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 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 18:15:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 684 transitions. [2022-01-31 18:15:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 18:15:24,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:24,426 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:24,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:15:24,426 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1072420926, now seen corresponding path program 83 times [2022-01-31 18:15:24,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:24,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246842530] [2022-01-31 18:15:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:24,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:24,428 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:24,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:24,432 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:26,511 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:26,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246842530] [2022-01-31 18:15:26,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [246842530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:26,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:26,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:15:26,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062712207] [2022-01-31 18:15:26,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:26,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:15:26,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:15:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:15:26,514 INFO L87 Difference]: Start difference. First operand 599 states and 684 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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 18:15:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:30,368 INFO L93 Difference]: Finished difference Result 1034 states and 1206 transitions. [2022-01-31 18:15:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:15:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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 179 [2022-01-31 18:15:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:30,370 INFO L225 Difference]: With dead ends: 1034 [2022-01-31 18:15:30,370 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 18:15:30,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:15:30,372 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1329 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:30,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1330 Valid, 38 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 18:15:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2022-01-31 18:15:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 516 states have (on average 1.005813953488372) internal successors, (519), 516 states have internal predecessors, (519), 87 states have call successors, (87), 3 states have call predecessors, (87), 2 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-01-31 18:15:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 692 transitions. [2022-01-31 18:15:30,484 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 692 transitions. Word has length 179 [2022-01-31 18:15:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:30,485 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 692 transitions. [2022-01-31 18:15:30,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 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 18:15:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 692 transitions. [2022-01-31 18:15:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 18:15:30,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:30,485 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:30,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:15:30,486 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -346818660, now seen corresponding path program 84 times [2022-01-31 18:15:30,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:30,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148917991] [2022-01-31 18:15:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:30,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:30,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:30,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:30,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:32,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:32,650 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 18:15:32,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:32,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148917991] [2022-01-31 18:15:32,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [148917991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:32,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:15:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110742721] [2022-01-31 18:15:32,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:15:32,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:15:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:15:32,653 INFO L87 Difference]: Start difference. First operand 606 states and 692 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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 18:15:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:36,711 INFO L93 Difference]: Finished difference Result 1046 states and 1220 transitions. [2022-01-31 18:15:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:15:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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 181 [2022-01-31 18:15:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:36,713 INFO L225 Difference]: With dead ends: 1046 [2022-01-31 18:15:36,713 INFO L226 Difference]: Without dead ends: 615 [2022-01-31 18:15:36,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:15:36,715 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1424 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:36,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 38 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-31 18:15:36,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2022-01-31 18:15:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 522 states have (on average 1.0057471264367817) internal successors, (525), 522 states have internal predecessors, (525), 88 states have call successors, (88), 3 states have call predecessors, (88), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-01-31 18:15:36,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 700 transitions. [2022-01-31 18:15:36,826 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 700 transitions. Word has length 181 [2022-01-31 18:15:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:36,826 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 700 transitions. [2022-01-31 18:15:36,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 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 18:15:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 700 transitions. [2022-01-31 18:15:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 18:15:36,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:36,827 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:36,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:15:36,827 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1563539322, now seen corresponding path program 85 times [2022-01-31 18:15:36,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:36,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381581659] [2022-01-31 18:15:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:36,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:36,828 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:36,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:36,832 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:38,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:38,958 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381581659] [2022-01-31 18:15:38,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381581659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:38,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:38,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:15:38,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701934197] [2022-01-31 18:15:38,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:38,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:15:38,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:15:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:15:38,961 INFO L87 Difference]: Start difference. First operand 613 states and 700 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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 18:15:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:43,064 INFO L93 Difference]: Finished difference Result 1058 states and 1234 transitions. [2022-01-31 18:15:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:15:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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 183 [2022-01-31 18:15:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:43,066 INFO L225 Difference]: With dead ends: 1058 [2022-01-31 18:15:43,066 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 18:15:43,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:15:43,069 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1555 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 1092 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1092 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:43,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 38 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1092 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 18:15:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2022-01-31 18:15:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 528 states have (on average 1.0056818181818181) internal successors, (531), 528 states have internal predecessors, (531), 89 states have call successors, (89), 3 states have call predecessors, (89), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-31 18:15:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 708 transitions. [2022-01-31 18:15:43,169 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 708 transitions. Word has length 183 [2022-01-31 18:15:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 708 transitions. [2022-01-31 18:15:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 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 18:15:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 708 transitions. [2022-01-31 18:15:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 18:15:43,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:43,170 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:15:43,170 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash -828442664, now seen corresponding path program 86 times [2022-01-31 18:15:43,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037383213] [2022-01-31 18:15:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:43,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:43,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:43,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:43,176 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:45,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037383213] [2022-01-31 18:15:45,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037383213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:45,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:45,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:15:45,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223552409] [2022-01-31 18:15:45,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:15:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:15:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:15:45,404 INFO L87 Difference]: Start difference. First operand 620 states and 708 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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 18:15:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:49,676 INFO L93 Difference]: Finished difference Result 1070 states and 1248 transitions. [2022-01-31 18:15:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:15:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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 185 [2022-01-31 18:15:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:49,678 INFO L225 Difference]: With dead ends: 1070 [2022-01-31 18:15:49,678 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 18:15:49,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:15:49,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1497 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 1057 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:49,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 58 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:15:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 18:15:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 627. [2022-01-31 18:15:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 534 states have (on average 1.0056179775280898) internal successors, (537), 534 states have internal predecessors, (537), 90 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 18:15:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 716 transitions. [2022-01-31 18:15:49,779 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 716 transitions. Word has length 185 [2022-01-31 18:15:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 716 transitions. [2022-01-31 18:15:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 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 18:15:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 716 transitions. [2022-01-31 18:15:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 18:15:49,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:49,780 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:49,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:15:49,781 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1715627850, now seen corresponding path program 87 times [2022-01-31 18:15:49,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361381612] [2022-01-31 18:15:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:49,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:49,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:49,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:49,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:52,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:52,088 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 18:15:52,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:52,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361381612] [2022-01-31 18:15:52,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [361381612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:52,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:52,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:15:52,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762631080] [2022-01-31 18:15:52,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:52,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:15:52,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:15:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:15:52,091 INFO L87 Difference]: Start difference. First operand 627 states and 716 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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 18:15:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:56,254 INFO L93 Difference]: Finished difference Result 1082 states and 1262 transitions. [2022-01-31 18:15:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:15:56,254 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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 187 [2022-01-31 18:15:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:56,256 INFO L225 Difference]: With dead ends: 1082 [2022-01-31 18:15:56,256 INFO L226 Difference]: Without dead ends: 636 [2022-01-31 18:15:56,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:15:56,258 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1421 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:56,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 48 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:15:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-31 18:15:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2022-01-31 18:15:56,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 540 states have (on average 1.0055555555555555) internal successors, (543), 540 states have internal predecessors, (543), 91 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-01-31 18:15:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 724 transitions. [2022-01-31 18:15:56,360 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 724 transitions. Word has length 187 [2022-01-31 18:15:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:56,361 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 724 transitions. [2022-01-31 18:15:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 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 18:15:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 724 transitions. [2022-01-31 18:15:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 18:15:56,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:56,361 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:56,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:15:56,362 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 397900308, now seen corresponding path program 88 times [2022-01-31 18:15:56,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:56,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032388220] [2022-01-31 18:15:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:56,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:56,363 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:15:56,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:56,367 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:58,719 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 18:15:58,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:58,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032388220] [2022-01-31 18:15:58,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032388220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:58,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:58,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:15:58,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364743147] [2022-01-31 18:15:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:58,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:15:58,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:15:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:15:58,722 INFO L87 Difference]: Start difference. First operand 634 states and 724 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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 18:16:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:03,201 INFO L93 Difference]: Finished difference Result 1094 states and 1276 transitions. [2022-01-31 18:16:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:16:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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 189 [2022-01-31 18:16:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:03,203 INFO L225 Difference]: With dead ends: 1094 [2022-01-31 18:16:03,203 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 18:16:03,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:16:03,205 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1534 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 1078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1078 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:03,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 38 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1078 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 18:16:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2022-01-31 18:16:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 546 states have (on average 1.0054945054945055) internal successors, (549), 546 states have internal predecessors, (549), 92 states have call successors, (92), 3 states have call predecessors, (92), 2 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 18:16:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 732 transitions. [2022-01-31 18:16:03,324 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 732 transitions. Word has length 189 [2022-01-31 18:16:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:03,324 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 732 transitions. [2022-01-31 18:16:03,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 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 18:16:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 732 transitions. [2022-01-31 18:16:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 18:16:03,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:03,325 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:03,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:16:03,325 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash -21070862, now seen corresponding path program 89 times [2022-01-31 18:16:03,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:03,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030497595] [2022-01-31 18:16:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:03,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:03,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:03,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:03,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:05,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:05,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030497595] [2022-01-31 18:16:05,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1030497595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:05,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:05,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:16:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68216388] [2022-01-31 18:16:05,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:05,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:16:05,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:16:05,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:16:05,710 INFO L87 Difference]: Start difference. First operand 641 states and 732 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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 18:16:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:10,080 INFO L93 Difference]: Finished difference Result 1106 states and 1290 transitions. [2022-01-31 18:16:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:16:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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 191 [2022-01-31 18:16:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:10,082 INFO L225 Difference]: With dead ends: 1106 [2022-01-31 18:16:10,082 INFO L226 Difference]: Without dead ends: 650 [2022-01-31 18:16:10,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:16:10,084 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1590 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:10,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 33 Invalid, 2115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-31 18:16:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 648. [2022-01-31 18:16:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 552 states have (on average 1.0054347826086956) internal successors, (555), 552 states have internal predecessors, (555), 93 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-01-31 18:16:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 740 transitions. [2022-01-31 18:16:10,203 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 740 transitions. Word has length 191 [2022-01-31 18:16:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:10,203 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 740 transitions. [2022-01-31 18:16:10,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 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 18:16:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 740 transitions. [2022-01-31 18:16:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 18:16:10,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:10,204 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:10,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:16:10,204 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:10,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1074560592, now seen corresponding path program 90 times [2022-01-31 18:16:10,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:10,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846134584] [2022-01-31 18:16:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:10,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:10,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:10,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:10,209 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:12,600 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846134584] [2022-01-31 18:16:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846134584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:12,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:16:12,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092194925] [2022-01-31 18:16:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:16:12,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:16:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:16:12,601 INFO L87 Difference]: Start difference. First operand 648 states and 740 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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 18:16:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:17,173 INFO L93 Difference]: Finished difference Result 1118 states and 1304 transitions. [2022-01-31 18:16:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:16:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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 193 [2022-01-31 18:16:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:17,175 INFO L225 Difference]: With dead ends: 1118 [2022-01-31 18:16:17,175 INFO L226 Difference]: Without dead ends: 657 [2022-01-31 18:16:17,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:16:17,177 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1556 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:17,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 53 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-31 18:16:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 655. [2022-01-31 18:16:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 558 states have (on average 1.0053763440860215) internal successors, (561), 558 states have internal predecessors, (561), 94 states have call successors, (94), 3 states have call predecessors, (94), 2 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 18:16:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 748 transitions. [2022-01-31 18:16:17,284 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 748 transitions. Word has length 193 [2022-01-31 18:16:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:17,284 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 748 transitions. [2022-01-31 18:16:17,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 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 18:16:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 748 transitions. [2022-01-31 18:16:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 18:16:17,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:17,285 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:17,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:16:17,285 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1709400366, now seen corresponding path program 91 times [2022-01-31 18:16:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:17,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113914552] [2022-01-31 18:16:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:17,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:17,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:17,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:17,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:19,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113914552] [2022-01-31 18:16:19,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113914552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:19,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:19,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:16:19,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508248284] [2022-01-31 18:16:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:19,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:16:19,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:16:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:16:19,737 INFO L87 Difference]: Start difference. First operand 655 states and 748 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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 18:16:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:24,294 INFO L93 Difference]: Finished difference Result 1130 states and 1318 transitions. [2022-01-31 18:16:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:16:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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 195 [2022-01-31 18:16:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:24,295 INFO L225 Difference]: With dead ends: 1130 [2022-01-31 18:16:24,296 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 18:16:24,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:16:24,298 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1708 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:24,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 33 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 18:16:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2022-01-31 18:16:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 564 states have (on average 1.0053191489361701) internal successors, (567), 564 states have internal predecessors, (567), 95 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-31 18:16:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 756 transitions. [2022-01-31 18:16:24,420 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 756 transitions. Word has length 195 [2022-01-31 18:16:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 756 transitions. [2022-01-31 18:16:24,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 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 18:16:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 756 transitions. [2022-01-31 18:16:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 18:16:24,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:24,421 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:24,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:16:24,421 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1905067148, now seen corresponding path program 92 times [2022-01-31 18:16:24,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721615074] [2022-01-31 18:16:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:24,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:24,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:24,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:24,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:26,946 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721615074] [2022-01-31 18:16:26,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721615074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:26,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:26,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:16:26,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434909376] [2022-01-31 18:16:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:26,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:16:26,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:16:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:16:26,948 INFO L87 Difference]: Start difference. First operand 662 states and 756 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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 18:16:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:31,717 INFO L93 Difference]: Finished difference Result 1142 states and 1332 transitions. [2022-01-31 18:16:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:16:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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 197 [2022-01-31 18:16:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:31,719 INFO L225 Difference]: With dead ends: 1142 [2022-01-31 18:16:31,719 INFO L226 Difference]: Without dead ends: 671 [2022-01-31 18:16:31,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:16:31,721 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1485 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:31,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 53 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-31 18:16:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 669. [2022-01-31 18:16:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 570 states have (on average 1.0052631578947369) internal successors, (573), 570 states have internal predecessors, (573), 96 states have call successors, (96), 3 states have call predecessors, (96), 2 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 18:16:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 764 transitions. [2022-01-31 18:16:31,834 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 764 transitions. Word has length 197 [2022-01-31 18:16:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:31,834 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 764 transitions. [2022-01-31 18:16:31,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 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 18:16:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 764 transitions. [2022-01-31 18:16:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 18:16:31,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:31,835 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:31,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:16:31,835 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash 962283626, now seen corresponding path program 93 times [2022-01-31 18:16:31,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099793163] [2022-01-31 18:16:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:31,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:31,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:31,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:31,841 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:34,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:34,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099793163] [2022-01-31 18:16:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099793163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:34,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:34,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:16:34,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635420767] [2022-01-31 18:16:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:34,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:16:34,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:16:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:16:34,486 INFO L87 Difference]: Start difference. First operand 669 states and 764 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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 18:16:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:39,221 INFO L93 Difference]: Finished difference Result 1154 states and 1346 transitions. [2022-01-31 18:16:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:16:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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 199 [2022-01-31 18:16:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:39,223 INFO L225 Difference]: With dead ends: 1154 [2022-01-31 18:16:39,223 INFO L226 Difference]: Without dead ends: 678 [2022-01-31 18:16:39,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:16:39,226 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1676 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 1178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1178 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 48 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1178 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-31 18:16:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2022-01-31 18:16:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 576 states have internal predecessors, (579), 97 states have call successors, (97), 3 states have call predecessors, (97), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-31 18:16:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 772 transitions. [2022-01-31 18:16:39,340 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 772 transitions. Word has length 199 [2022-01-31 18:16:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 772 transitions. [2022-01-31 18:16:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 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 18:16:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 772 transitions. [2022-01-31 18:16:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 18:16:39,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:39,341 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:39,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:16:39,341 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1185418440, now seen corresponding path program 94 times [2022-01-31 18:16:39,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:39,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796532235] [2022-01-31 18:16:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:39,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:39,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:39,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:39,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,943 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 18:16:41,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:41,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796532235] [2022-01-31 18:16:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796532235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:41,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:41,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:16:41,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523803952] [2022-01-31 18:16:41,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:41,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:16:41,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:16:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:16:41,946 INFO L87 Difference]: Start difference. First operand 676 states and 772 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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 18:16:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:46,970 INFO L93 Difference]: Finished difference Result 1166 states and 1360 transitions. [2022-01-31 18:16:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:16:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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 201 [2022-01-31 18:16:46,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:46,971 INFO L225 Difference]: With dead ends: 1166 [2022-01-31 18:16:46,972 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 18:16:46,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:16:46,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1687 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 1187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:46,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1688 Valid, 43 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1187 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:16:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 18:16:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2022-01-31 18:16:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 582 states have (on average 1.0051546391752577) internal successors, (585), 582 states have internal predecessors, (585), 98 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 18:16:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 780 transitions. [2022-01-31 18:16:47,091 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 780 transitions. Word has length 201 [2022-01-31 18:16:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:47,091 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 780 transitions. [2022-01-31 18:16:47,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 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 18:16:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 780 transitions. [2022-01-31 18:16:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 18:16:47,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:47,092 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:47,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:16:47,092 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 869609894, now seen corresponding path program 95 times [2022-01-31 18:16:47,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:47,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160826633] [2022-01-31 18:16:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:47,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:47,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:47,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:47,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:49,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:49,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160826633] [2022-01-31 18:16:49,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [160826633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:49,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:49,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:16:49,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900792992] [2022-01-31 18:16:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:16:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:16:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:16:49,743 INFO L87 Difference]: Start difference. First operand 683 states and 780 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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 18:16:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:54,786 INFO L93 Difference]: Finished difference Result 1178 states and 1374 transitions. [2022-01-31 18:16:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:16:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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 203 [2022-01-31 18:16:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:54,788 INFO L225 Difference]: With dead ends: 1178 [2022-01-31 18:16:54,788 INFO L226 Difference]: Without dead ends: 692 [2022-01-31 18:16:54,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:16:54,790 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1752 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 1227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1753 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1227 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:54,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1753 Valid, 48 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1227 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:16:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-01-31 18:16:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2022-01-31 18:16:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 588 states have (on average 1.0051020408163265) internal successors, (591), 588 states have internal predecessors, (591), 99 states have call successors, (99), 3 states have call predecessors, (99), 2 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-01-31 18:16:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 788 transitions. [2022-01-31 18:16:54,908 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 788 transitions. Word has length 203 [2022-01-31 18:16:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:54,909 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 788 transitions. [2022-01-31 18:16:54,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 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 18:16:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 788 transitions. [2022-01-31 18:16:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 18:16:54,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:54,909 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:54,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:16:54,909 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1974692092, now seen corresponding path program 96 times [2022-01-31 18:16:54,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:54,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825610621] [2022-01-31 18:16:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:54,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:54,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:16:54,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:54,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:57,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:57,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825610621] [2022-01-31 18:16:57,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825610621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:57,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:57,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:16:57,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378191915] [2022-01-31 18:16:57,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:57,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:16:57,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:16:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:16:57,631 INFO L87 Difference]: Start difference. First operand 690 states and 788 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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 18:17:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:02,831 INFO L93 Difference]: Finished difference Result 1190 states and 1388 transitions. [2022-01-31 18:17:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:17:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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 205 [2022-01-31 18:17:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:02,833 INFO L225 Difference]: With dead ends: 1190 [2022-01-31 18:17:02,833 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 18:17:02,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:17:02,836 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1463 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 1036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1036 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:02,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 58 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1036 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 18:17:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-01-31 18:17:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 594 states have (on average 1.005050505050505) internal successors, (597), 594 states have internal predecessors, (597), 100 states have call successors, (100), 3 states have call predecessors, (100), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-01-31 18:17:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 796 transitions. [2022-01-31 18:17:02,972 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 796 transitions. Word has length 205 [2022-01-31 18:17:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:02,972 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 796 transitions. [2022-01-31 18:17:02,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 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 18:17:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 796 transitions. [2022-01-31 18:17:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 18:17:02,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:02,973 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:02,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:17:02,973 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 545266914, now seen corresponding path program 97 times [2022-01-31 18:17:02,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:02,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949303322] [2022-01-31 18:17:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:02,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:02,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:02,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:02,980 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:05,773 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:05,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949303322] [2022-01-31 18:17:05,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949303322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:05,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:05,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:17:05,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773011440] [2022-01-31 18:17:05,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:05,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:17:05,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:17:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:17:05,777 INFO L87 Difference]: Start difference. First operand 697 states and 796 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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 18:17:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:10,949 INFO L93 Difference]: Finished difference Result 1202 states and 1402 transitions. [2022-01-31 18:17:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:17:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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 207 [2022-01-31 18:17:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:10,951 INFO L225 Difference]: With dead ends: 1202 [2022-01-31 18:17:10,951 INFO L226 Difference]: Without dead ends: 706 [2022-01-31 18:17:10,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:17:10,953 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1543 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 1092 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1092 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:10,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 43 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1092 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-31 18:17:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2022-01-31 18:17:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 600 states have (on average 1.005) internal successors, (603), 600 states have internal predecessors, (603), 101 states have call successors, (101), 3 states have call predecessors, (101), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 18:17:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 804 transitions. [2022-01-31 18:17:11,090 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 804 transitions. Word has length 207 [2022-01-31 18:17:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:11,091 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 804 transitions. [2022-01-31 18:17:11,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 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 18:17:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 804 transitions. [2022-01-31 18:17:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 18:17:11,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:11,091 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:11,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:17:11,092 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:11,092 INFO L85 PathProgramCache]: Analyzing trace with hash -135683264, now seen corresponding path program 98 times [2022-01-31 18:17:11,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:11,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088023403] [2022-01-31 18:17:11,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:11,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:11,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:11,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:11,098 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:13,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:13,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088023403] [2022-01-31 18:17:13,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088023403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:13,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:13,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:17:13,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123345338] [2022-01-31 18:17:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:13,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:17:13,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:13,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:17:13,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:17:13,886 INFO L87 Difference]: Start difference. First operand 704 states and 804 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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 18:17:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:19,315 INFO L93 Difference]: Finished difference Result 1214 states and 1416 transitions. [2022-01-31 18:17:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:17:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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 209 [2022-01-31 18:17:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:19,317 INFO L225 Difference]: With dead ends: 1214 [2022-01-31 18:17:19,317 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 18:17:19,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:17:19,320 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1809 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 1274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1274 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:19,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1810 Valid, 48 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1274 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 18:17:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 711. [2022-01-31 18:17:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 606 states have (on average 1.004950495049505) internal successors, (609), 606 states have internal predecessors, (609), 102 states have call successors, (102), 3 states have call predecessors, (102), 2 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 18:17:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 812 transitions. [2022-01-31 18:17:19,449 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 812 transitions. Word has length 209 [2022-01-31 18:17:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:19,450 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 812 transitions. [2022-01-31 18:17:19,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 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 18:17:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 812 transitions. [2022-01-31 18:17:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 18:17:19,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:19,451 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:19,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:17:19,451 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:19,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1693775330, now seen corresponding path program 99 times [2022-01-31 18:17:19,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:19,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737767303] [2022-01-31 18:17:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:19,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:19,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:19,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:19,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:22,453 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:22,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737767303] [2022-01-31 18:17:22,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737767303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:22,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:22,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:17:22,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530358521] [2022-01-31 18:17:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:22,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:17:22,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:17:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:17:22,457 INFO L87 Difference]: Start difference. First operand 711 states and 812 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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 18:17:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:27,973 INFO L93 Difference]: Finished difference Result 1226 states and 1430 transitions. [2022-01-31 18:17:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:17:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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 211 [2022-01-31 18:17:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:27,975 INFO L225 Difference]: With dead ends: 1226 [2022-01-31 18:17:27,975 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 18:17:27,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:17:27,977 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1829 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:27,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 38 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 18:17:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 718. [2022-01-31 18:17:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 612 states have (on average 1.0049019607843137) internal successors, (615), 612 states have internal predecessors, (615), 103 states have call successors, (103), 3 states have call predecessors, (103), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 18:17:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 820 transitions. [2022-01-31 18:17:28,120 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 820 transitions. Word has length 211 [2022-01-31 18:17:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:28,120 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 820 transitions. [2022-01-31 18:17:28,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 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 18:17:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 820 transitions. [2022-01-31 18:17:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 18:17:28,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:28,121 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:17:28,121 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -76664452, now seen corresponding path program 100 times [2022-01-31 18:17:28,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:28,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002050651] [2022-01-31 18:17:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:28,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:28,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:28,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:28,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:31,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002050651] [2022-01-31 18:17:31,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002050651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:31,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:31,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:17:31,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106038781] [2022-01-31 18:17:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:31,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:17:31,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:17:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:17:31,040 INFO L87 Difference]: Start difference. First operand 718 states and 820 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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 18:17:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:36,829 INFO L93 Difference]: Finished difference Result 1238 states and 1444 transitions. [2022-01-31 18:17:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:17:36,829 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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 213 [2022-01-31 18:17:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:36,831 INFO L225 Difference]: With dead ends: 1238 [2022-01-31 18:17:36,831 INFO L226 Difference]: Without dead ends: 727 [2022-01-31 18:17:36,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:17:36,834 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2080 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 1452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2081 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1452 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:36,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2081 Valid, 43 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1452 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:17:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-31 18:17:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 725. [2022-01-31 18:17:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 618 states have (on average 1.0048543689320388) internal successors, (621), 618 states have internal predecessors, (621), 104 states have call successors, (104), 3 states have call predecessors, (104), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-01-31 18:17:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 828 transitions. [2022-01-31 18:17:36,993 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 828 transitions. Word has length 213 [2022-01-31 18:17:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:36,993 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 828 transitions. [2022-01-31 18:17:36,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 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 18:17:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 828 transitions. [2022-01-31 18:17:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 18:17:36,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:36,994 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:36,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:17:36,994 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash -811271846, now seen corresponding path program 101 times [2022-01-31 18:17:36,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:36,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202624747] [2022-01-31 18:17:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:36,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:36,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:36,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:37,001 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:40,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202624747] [2022-01-31 18:17:40,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [202624747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:40,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:40,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:17:40,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492133548] [2022-01-31 18:17:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:40,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:17:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:17:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:17:40,004 INFO L87 Difference]: Start difference. First operand 725 states and 828 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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 18:17:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:45,658 INFO L93 Difference]: Finished difference Result 1250 states and 1458 transitions. [2022-01-31 18:17:45,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:17:45,659 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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 215 [2022-01-31 18:17:45,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:45,660 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 18:17:45,660 INFO L226 Difference]: Without dead ends: 734 [2022-01-31 18:17:45,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:17:45,663 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1818 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 1277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1277 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:45,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 43 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1277 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-31 18:17:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 732. [2022-01-31 18:17:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 624 states have (on average 1.0048076923076923) internal successors, (627), 624 states have internal predecessors, (627), 105 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 18:17:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 836 transitions. [2022-01-31 18:17:45,817 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 836 transitions. Word has length 215 [2022-01-31 18:17:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:45,817 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 836 transitions. [2022-01-31 18:17:45,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 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 18:17:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 836 transitions. [2022-01-31 18:17:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 18:17:45,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:45,818 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:45,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:17:45,818 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1900626360, now seen corresponding path program 102 times [2022-01-31 18:17:45,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950543478] [2022-01-31 18:17:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:45,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:45,820 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:45,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:45,826 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:48,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:48,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:48,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950543478] [2022-01-31 18:17:48,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1950543478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:48,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:48,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:17:48,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523433395] [2022-01-31 18:17:48,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:48,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:17:48,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:48,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:17:48,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:17:48,942 INFO L87 Difference]: Start difference. First operand 732 states and 836 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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 18:17:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:54,865 INFO L93 Difference]: Finished difference Result 1262 states and 1472 transitions. [2022-01-31 18:17:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:17:54,866 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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 217 [2022-01-31 18:17:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:54,868 INFO L225 Difference]: With dead ends: 1262 [2022-01-31 18:17:54,868 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 18:17:54,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:17:54,871 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1817 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1278 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:54,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1818 Valid, 58 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1278 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:17:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 18:17:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 739. [2022-01-31 18:17:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 630 states have (on average 1.0047619047619047) internal successors, (633), 630 states have internal predecessors, (633), 106 states have call successors, (106), 3 states have call predecessors, (106), 2 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2022-01-31 18:17:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 844 transitions. [2022-01-31 18:17:55,050 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 844 transitions. Word has length 217 [2022-01-31 18:17:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:55,051 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 844 transitions. [2022-01-31 18:17:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 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 18:17:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 844 transitions. [2022-01-31 18:17:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 18:17:55,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:55,052 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:55,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:17:55,052 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 989653654, now seen corresponding path program 103 times [2022-01-31 18:17:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200078699] [2022-01-31 18:17:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:55,053 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:55,053 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:17:55,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:55,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:58,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:58,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200078699] [2022-01-31 18:17:58,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200078699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:58,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:58,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:17:58,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237233577] [2022-01-31 18:17:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:58,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:17:58,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:17:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:17:58,128 INFO L87 Difference]: Start difference. First operand 739 states and 844 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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 18:18:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:04,155 INFO L93 Difference]: Finished difference Result 1274 states and 1486 transitions. [2022-01-31 18:18:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:18:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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 219 [2022-01-31 18:18:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:04,157 INFO L225 Difference]: With dead ends: 1274 [2022-01-31 18:18:04,157 INFO L226 Difference]: Without dead ends: 748 [2022-01-31 18:18:04,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:18:04,160 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1843 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:04,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1844 Valid, 48 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:18:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-31 18:18:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2022-01-31 18:18:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 636 states have (on average 1.0047169811320755) internal successors, (639), 636 states have internal predecessors, (639), 107 states have call successors, (107), 3 states have call predecessors, (107), 2 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 18:18:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 852 transitions. [2022-01-31 18:18:04,330 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 852 transitions. Word has length 219 [2022-01-31 18:18:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:04,330 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 852 transitions. [2022-01-31 18:18:04,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 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 18:18:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 852 transitions. [2022-01-31 18:18:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 18:18:04,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:04,331 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:04,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:18:04,331 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1718211572, now seen corresponding path program 104 times [2022-01-31 18:18:04,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:04,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478041137] [2022-01-31 18:18:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:04,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:04,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:04,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:04,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:07,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:07,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478041137] [2022-01-31 18:18:07,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478041137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:07,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:07,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:18:07,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456098919] [2022-01-31 18:18:07,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:07,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:18:07,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:18:07,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:18:07,477 INFO L87 Difference]: Start difference. First operand 746 states and 852 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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 18:18:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:13,501 INFO L93 Difference]: Finished difference Result 1286 states and 1500 transitions. [2022-01-31 18:18:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:18:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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 221 [2022-01-31 18:18:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:13,503 INFO L225 Difference]: With dead ends: 1286 [2022-01-31 18:18:13,503 INFO L226 Difference]: Without dead ends: 755 [2022-01-31 18:18:13,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:18:13,505 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1998 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 1400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1400 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:13,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1999 Valid, 33 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1400 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-31 18:18:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 753. [2022-01-31 18:18:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 642 states have (on average 1.0046728971962617) internal successors, (645), 642 states have internal predecessors, (645), 108 states have call successors, (108), 3 states have call predecessors, (108), 2 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-01-31 18:18:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 860 transitions. [2022-01-31 18:18:13,648 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 860 transitions. Word has length 221 [2022-01-31 18:18:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:13,648 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 860 transitions. [2022-01-31 18:18:13,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 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 18:18:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 860 transitions. [2022-01-31 18:18:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 18:18:13,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:13,649 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:13,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:18:13,649 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:13,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1782701522, now seen corresponding path program 105 times [2022-01-31 18:18:13,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:13,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126389229] [2022-01-31 18:18:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:13,650 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:13,650 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:13,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:13,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:16,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:16,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126389229] [2022-01-31 18:18:16,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1126389229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:16,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:16,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:18:16,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260400729] [2022-01-31 18:18:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:16,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:18:16,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:18:16,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:18:16,906 INFO L87 Difference]: Start difference. First operand 753 states and 860 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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 18:18:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:22,962 INFO L93 Difference]: Finished difference Result 1298 states and 1514 transitions. [2022-01-31 18:18:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:18:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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 223 [2022-01-31 18:18:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:22,976 INFO L225 Difference]: With dead ends: 1298 [2022-01-31 18:18:22,976 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 18:18:22,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:18:22,979 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1688 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:22,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 43 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 18:18:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2022-01-31 18:18:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 648 states have (on average 1.0046296296296295) internal successors, (651), 648 states have internal predecessors, (651), 109 states have call successors, (109), 3 states have call predecessors, (109), 2 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 18:18:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 868 transitions. [2022-01-31 18:18:23,134 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 868 transitions. Word has length 223 [2022-01-31 18:18:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 868 transitions. [2022-01-31 18:18:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 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 18:18:23,135 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 868 transitions. [2022-01-31 18:18:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 18:18:23,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:23,135 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:18:23,135 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash -666965968, now seen corresponding path program 106 times [2022-01-31 18:18:23,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:23,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051010639] [2022-01-31 18:18:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:23,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:23,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:23,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:23,142 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:26,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051010639] [2022-01-31 18:18:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051010639] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:26,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:26,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:18:26,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041532544] [2022-01-31 18:18:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:18:26,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:18:26,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:18:26,397 INFO L87 Difference]: Start difference. First operand 760 states and 868 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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 18:18:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:32,793 INFO L93 Difference]: Finished difference Result 1310 states and 1528 transitions. [2022-01-31 18:18:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:18:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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 225 [2022-01-31 18:18:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:32,795 INFO L225 Difference]: With dead ends: 1310 [2022-01-31 18:18:32,795 INFO L226 Difference]: Without dead ends: 769 [2022-01-31 18:18:32,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:18:32,798 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 1482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1482 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:32,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2120 Valid, 38 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1482 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:18:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-31 18:18:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 767. [2022-01-31 18:18:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 654 states have (on average 1.0045871559633028) internal successors, (657), 654 states have internal predecessors, (657), 110 states have call successors, (110), 3 states have call predecessors, (110), 2 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-01-31 18:18:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 876 transitions. [2022-01-31 18:18:32,944 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 876 transitions. Word has length 225 [2022-01-31 18:18:32,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:32,944 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 876 transitions. [2022-01-31 18:18:32,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 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 18:18:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 876 transitions. [2022-01-31 18:18:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 18:18:32,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:32,945 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:32,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:18:32,945 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1155345650, now seen corresponding path program 107 times [2022-01-31 18:18:32,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:32,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857656983] [2022-01-31 18:18:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:32,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:32,946 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:32,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:32,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:36,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:36,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857656983] [2022-01-31 18:18:36,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [857656983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:36,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:18:36,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339223115] [2022-01-31 18:18:36,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:36,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:18:36,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:18:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:18:36,274 INFO L87 Difference]: Start difference. First operand 767 states and 876 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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 18:18:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:42,457 INFO L93 Difference]: Finished difference Result 1322 states and 1542 transitions. [2022-01-31 18:18:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:18:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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 227 [2022-01-31 18:18:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:42,459 INFO L225 Difference]: With dead ends: 1322 [2022-01-31 18:18:42,459 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 18:18:42,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:18:42,462 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1749 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 1236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1750 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1236 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:42,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1750 Valid, 53 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1236 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:18:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 18:18:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 774. [2022-01-31 18:18:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 660 states have (on average 1.0045454545454546) internal successors, (663), 660 states have internal predecessors, (663), 111 states have call successors, (111), 3 states have call predecessors, (111), 2 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 18:18:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 884 transitions. [2022-01-31 18:18:42,624 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 884 transitions. Word has length 227 [2022-01-31 18:18:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:42,624 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 884 transitions. [2022-01-31 18:18:42,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 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 18:18:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 884 transitions. [2022-01-31 18:18:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 18:18:42,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:42,625 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:42,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:18:42,625 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:42,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1958182508, now seen corresponding path program 108 times [2022-01-31 18:18:42,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:42,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404361941] [2022-01-31 18:18:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:42,626 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:42,626 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:42,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:42,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:46,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:46,017 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404361941] [2022-01-31 18:18:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [404361941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:46,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:46,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:18:46,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99050773] [2022-01-31 18:18:46,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:18:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:18:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:18:46,019 INFO L87 Difference]: Start difference. First operand 774 states and 884 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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 18:18:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:52,621 INFO L93 Difference]: Finished difference Result 1334 states and 1556 transitions. [2022-01-31 18:18:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:18:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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 229 [2022-01-31 18:18:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:52,623 INFO L225 Difference]: With dead ends: 1334 [2022-01-31 18:18:52,623 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 18:18:52,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:18:52,626 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2666 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 1854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1854 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:52,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2667 Valid, 23 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1854 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:18:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 18:18:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 781. [2022-01-31 18:18:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 666 states have (on average 1.0045045045045045) internal successors, (669), 666 states have internal predecessors, (669), 112 states have call successors, (112), 3 states have call predecessors, (112), 2 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-01-31 18:18:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 892 transitions. [2022-01-31 18:18:52,814 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 892 transitions. Word has length 229 [2022-01-31 18:18:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:52,814 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 892 transitions. [2022-01-31 18:18:52,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 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 18:18:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 892 transitions. [2022-01-31 18:18:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 18:18:52,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:52,814 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:52,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:18:52,815 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 466537034, now seen corresponding path program 109 times [2022-01-31 18:18:52,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719202372] [2022-01-31 18:18:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:52,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:52,816 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:18:52,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:52,822 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:56,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719202372] [2022-01-31 18:18:56,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1719202372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:56,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:56,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:18:56,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073450814] [2022-01-31 18:18:56,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:56,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:18:56,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:56,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:18:56,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:18:56,223 INFO L87 Difference]: Start difference. First operand 781 states and 892 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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 18:19:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:02,943 INFO L93 Difference]: Finished difference Result 1346 states and 1570 transitions. [2022-01-31 18:19:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:19:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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 231 [2022-01-31 18:19:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:02,946 INFO L225 Difference]: With dead ends: 1346 [2022-01-31 18:19:02,946 INFO L226 Difference]: Without dead ends: 790 [2022-01-31 18:19:02,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:19:02,949 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1939 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 1362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1362 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:02,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1940 Valid, 63 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1362 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-31 18:19:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 788. [2022-01-31 18:19:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 672 states have (on average 1.0044642857142858) internal successors, (675), 672 states have internal predecessors, (675), 113 states have call successors, (113), 3 states have call predecessors, (113), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-01-31 18:19:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 900 transitions. [2022-01-31 18:19:03,120 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 900 transitions. Word has length 231 [2022-01-31 18:19:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:03,120 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 900 transitions. [2022-01-31 18:19:03,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 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 18:19:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 900 transitions. [2022-01-31 18:19:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 18:19:03,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:03,121 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:03,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:19:03,121 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:03,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1514313384, now seen corresponding path program 110 times [2022-01-31 18:19:03,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:03,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899094864] [2022-01-31 18:19:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:03,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:03,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:03,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:03,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:06,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:06,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:06,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899094864] [2022-01-31 18:19:06,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [899094864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:06,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:06,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:19:06,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378786640] [2022-01-31 18:19:06,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:19:06,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:19:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:19:06,650 INFO L87 Difference]: Start difference. First operand 788 states and 900 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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 18:19:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:13,319 INFO L93 Difference]: Finished difference Result 1358 states and 1584 transitions. [2022-01-31 18:19:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:19:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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 233 [2022-01-31 18:19:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:13,321 INFO L225 Difference]: With dead ends: 1358 [2022-01-31 18:19:13,321 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 18:19:13,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:19:13,339 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2125 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:13,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2125 Valid, 33 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 18:19:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 795. [2022-01-31 18:19:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 678 states have (on average 1.0044247787610618) internal successors, (681), 678 states have internal predecessors, (681), 114 states have call successors, (114), 3 states have call predecessors, (114), 2 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-01-31 18:19:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 908 transitions. [2022-01-31 18:19:13,509 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 908 transitions. Word has length 233 [2022-01-31 18:19:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:13,509 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 908 transitions. [2022-01-31 18:19:13,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 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 18:19:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 908 transitions. [2022-01-31 18:19:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 18:19:13,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:13,510 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:13,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:19:13,510 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -889928826, now seen corresponding path program 111 times [2022-01-31 18:19:13,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496852066] [2022-01-31 18:19:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:13,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:13,512 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:13,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:13,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:17,083 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:17,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496852066] [2022-01-31 18:19:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [496852066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:17,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:17,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:19:17,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661642930] [2022-01-31 18:19:17,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:19:17,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:19:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:19:17,086 INFO L87 Difference]: Start difference. First operand 795 states and 908 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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 18:19:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:23,859 INFO L93 Difference]: Finished difference Result 1370 states and 1598 transitions. [2022-01-31 18:19:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:19:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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 235 [2022-01-31 18:19:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:23,861 INFO L225 Difference]: With dead ends: 1370 [2022-01-31 18:19:23,861 INFO L226 Difference]: Without dead ends: 804 [2022-01-31 18:19:23,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:19:23,865 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2018 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:23,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 38 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-31 18:19:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 802. [2022-01-31 18:19:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 684 states have (on average 1.0043859649122806) internal successors, (687), 684 states have internal predecessors, (687), 115 states have call successors, (115), 3 states have call predecessors, (115), 2 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-01-31 18:19:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 916 transitions. [2022-01-31 18:19:24,024 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 916 transitions. Word has length 235 [2022-01-31 18:19:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 916 transitions. [2022-01-31 18:19:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 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 18:19:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 916 transitions. [2022-01-31 18:19:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 18:19:24,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:24,025 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:24,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:19:24,025 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:24,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:24,026 INFO L85 PathProgramCache]: Analyzing trace with hash -674287388, now seen corresponding path program 112 times [2022-01-31 18:19:24,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:24,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69750815] [2022-01-31 18:19:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:24,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:24,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:24,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:24,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:27,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:27,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:27,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69750815] [2022-01-31 18:19:27,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [69750815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:27,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:27,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:19:27,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760986968] [2022-01-31 18:19:27,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:27,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:19:27,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:19:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:19:27,745 INFO L87 Difference]: Start difference. First operand 802 states and 916 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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 18:19:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:34,736 INFO L93 Difference]: Finished difference Result 1382 states and 1612 transitions. [2022-01-31 18:19:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:19:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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 237 [2022-01-31 18:19:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:34,738 INFO L225 Difference]: With dead ends: 1382 [2022-01-31 18:19:34,738 INFO L226 Difference]: Without dead ends: 811 [2022-01-31 18:19:34,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:19:34,741 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1999 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:34,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2000 Valid, 33 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-31 18:19:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 809. [2022-01-31 18:19:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 690 states have (on average 1.0043478260869565) internal successors, (693), 690 states have internal predecessors, (693), 116 states have call successors, (116), 3 states have call predecessors, (116), 2 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 18:19:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 924 transitions. [2022-01-31 18:19:34,915 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 924 transitions. Word has length 237 [2022-01-31 18:19:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 924 transitions. [2022-01-31 18:19:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 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 18:19:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 924 transitions. [2022-01-31 18:19:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 18:19:34,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:34,916 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:34,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:19:34,917 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 398704322, now seen corresponding path program 113 times [2022-01-31 18:19:34,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:34,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478321588] [2022-01-31 18:19:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:34,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:34,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:34,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:34,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:38,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:38,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478321588] [2022-01-31 18:19:38,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [478321588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:38,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:38,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:19:38,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40077379] [2022-01-31 18:19:38,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:38,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:19:38,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:19:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:19:38,595 INFO L87 Difference]: Start difference. First operand 809 states and 924 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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 18:19:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:45,677 INFO L93 Difference]: Finished difference Result 1394 states and 1626 transitions. [2022-01-31 18:19:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:19:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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 239 [2022-01-31 18:19:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:45,679 INFO L225 Difference]: With dead ends: 1394 [2022-01-31 18:19:45,679 INFO L226 Difference]: Without dead ends: 818 [2022-01-31 18:19:45,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:19:45,682 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1854 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 1310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1310 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:45,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 33 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1310 Valid, 1429 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-31 18:19:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 816. [2022-01-31 18:19:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 696 states have (on average 1.0043103448275863) internal successors, (699), 696 states have internal predecessors, (699), 117 states have call successors, (117), 3 states have call predecessors, (117), 2 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2022-01-31 18:19:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 932 transitions. [2022-01-31 18:19:45,889 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 932 transitions. Word has length 239 [2022-01-31 18:19:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:45,889 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 932 transitions. [2022-01-31 18:19:45,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 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 18:19:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 932 transitions. [2022-01-31 18:19:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 18:19:45,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:45,890 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:45,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:19:45,890 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash 751586592, now seen corresponding path program 114 times [2022-01-31 18:19:45,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795702723] [2022-01-31 18:19:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:45,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:45,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:45,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:45,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:49,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:19:49,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795702723] [2022-01-31 18:19:49,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795702723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:49,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:49,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:19:49,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810927894] [2022-01-31 18:19:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:19:49,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:19:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:19:49,640 INFO L87 Difference]: Start difference. First operand 816 states and 932 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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 18:19:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:56,820 INFO L93 Difference]: Finished difference Result 1406 states and 1640 transitions. [2022-01-31 18:19:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:19:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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 241 [2022-01-31 18:19:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:56,823 INFO L225 Difference]: With dead ends: 1406 [2022-01-31 18:19:56,823 INFO L226 Difference]: Without dead ends: 825 [2022-01-31 18:19:56,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:19:56,826 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1931 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 1363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:56,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1932 Valid, 63 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1363 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:19:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-31 18:19:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 823. [2022-01-31 18:19:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 702 states have (on average 1.0042735042735043) internal successors, (705), 702 states have internal predecessors, (705), 118 states have call successors, (118), 3 states have call predecessors, (118), 2 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-01-31 18:19:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 940 transitions. [2022-01-31 18:19:57,004 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 940 transitions. Word has length 241 [2022-01-31 18:19:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:57,005 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 940 transitions. [2022-01-31 18:19:57,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 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 18:19:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 940 transitions. [2022-01-31 18:19:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 18:19:57,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:57,005 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:19:57,006 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash 569031678, now seen corresponding path program 115 times [2022-01-31 18:19:57,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:57,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465887239] [2022-01-31 18:19:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:57,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:57,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:19:57,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:57,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:00,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:00,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:00,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465887239] [2022-01-31 18:20:00,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [465887239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:00,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:00,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:20:00,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720591911] [2022-01-31 18:20:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:00,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:20:00,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:00,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:20:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:20:00,833 INFO L87 Difference]: Start difference. First operand 823 states and 940 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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 18:20:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:08,191 INFO L93 Difference]: Finished difference Result 1418 states and 1654 transitions. [2022-01-31 18:20:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:20:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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 243 [2022-01-31 18:20:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:08,193 INFO L225 Difference]: With dead ends: 1418 [2022-01-31 18:20:08,193 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 18:20:08,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:20:08,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1918 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:08,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 48 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 18:20:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 830. [2022-01-31 18:20:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 708 states have (on average 1.0042372881355932) internal successors, (711), 708 states have internal predecessors, (711), 119 states have call successors, (119), 3 states have call predecessors, (119), 2 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2022-01-31 18:20:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 948 transitions. [2022-01-31 18:20:08,367 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 948 transitions. Word has length 243 [2022-01-31 18:20:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:08,368 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 948 transitions. [2022-01-31 18:20:08,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 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 18:20:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 948 transitions. [2022-01-31 18:20:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 18:20:08,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:08,368 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:08,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:20:08,369 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1227418460, now seen corresponding path program 116 times [2022-01-31 18:20:08,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:08,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740258904] [2022-01-31 18:20:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:08,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:08,370 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:08,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:08,377 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:12,264 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740258904] [2022-01-31 18:20:12,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [740258904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:12,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:12,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:20:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812883047] [2022-01-31 18:20:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:20:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:20:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:20:12,268 INFO L87 Difference]: Start difference. First operand 830 states and 948 transitions. Second operand has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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 18:20:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:19,737 INFO L93 Difference]: Finished difference Result 1430 states and 1668 transitions. [2022-01-31 18:20:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:20:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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 245 [2022-01-31 18:20:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:19,739 INFO L225 Difference]: With dead ends: 1430 [2022-01-31 18:20:19,739 INFO L226 Difference]: Without dead ends: 839 [2022-01-31 18:20:19,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:20:19,742 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1914 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 1352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1352 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:19,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 58 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1352 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-31 18:20:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 837. [2022-01-31 18:20:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 714 states have (on average 1.004201680672269) internal successors, (717), 714 states have internal predecessors, (717), 120 states have call successors, (120), 3 states have call predecessors, (120), 2 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2022-01-31 18:20:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 956 transitions. [2022-01-31 18:20:19,914 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 956 transitions. Word has length 245 [2022-01-31 18:20:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:19,914 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 956 transitions. [2022-01-31 18:20:19,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 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 18:20:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 956 transitions. [2022-01-31 18:20:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 18:20:19,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:19,915 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:19,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:20:19,915 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1718043846, now seen corresponding path program 117 times [2022-01-31 18:20:19,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:19,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430941843] [2022-01-31 18:20:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:19,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:19,917 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:19,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:23,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430941843] [2022-01-31 18:20:23,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [430941843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:23,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:23,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:20:23,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542023089] [2022-01-31 18:20:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:23,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:20:23,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:20:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:20:23,859 INFO L87 Difference]: Start difference. First operand 837 states and 956 transitions. Second operand has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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 18:20:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:31,436 INFO L93 Difference]: Finished difference Result 1442 states and 1682 transitions. [2022-01-31 18:20:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:20:31,436 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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 247 [2022-01-31 18:20:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:31,438 INFO L225 Difference]: With dead ends: 1442 [2022-01-31 18:20:31,438 INFO L226 Difference]: Without dead ends: 846 [2022-01-31 18:20:31,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:20:31,441 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2075 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 1458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1458 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:31,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2076 Valid, 43 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1458 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:20:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-31 18:20:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2022-01-31 18:20:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 720 states have (on average 1.0041666666666667) internal successors, (723), 720 states have internal predecessors, (723), 121 states have call successors, (121), 3 states have call predecessors, (121), 2 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2022-01-31 18:20:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 964 transitions. [2022-01-31 18:20:31,664 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 964 transitions. Word has length 247 [2022-01-31 18:20:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:31,664 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 964 transitions. [2022-01-31 18:20:31,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 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 18:20:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 964 transitions. [2022-01-31 18:20:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 18:20:31,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:31,665 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:31,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:20:31,665 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1923871848, now seen corresponding path program 118 times [2022-01-31 18:20:31,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:31,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479168243] [2022-01-31 18:20:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:31,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:31,667 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:31,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:31,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:35,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:35,723 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:35,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479168243] [2022-01-31 18:20:35,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [479168243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:35,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:35,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:20:35,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571633568] [2022-01-31 18:20:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:35,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:20:35,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:20:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:20:35,725 INFO L87 Difference]: Start difference. First operand 844 states and 964 transitions. Second operand has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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 18:20:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:43,523 INFO L93 Difference]: Finished difference Result 1454 states and 1696 transitions. [2022-01-31 18:20:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:20:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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 249 [2022-01-31 18:20:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:43,525 INFO L225 Difference]: With dead ends: 1454 [2022-01-31 18:20:43,525 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 18:20:43,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:20:43,528 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2443 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 1706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2444 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1706 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:43,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2444 Valid, 48 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1706 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:20:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 18:20:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 851. [2022-01-31 18:20:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 726 states have (on average 1.0041322314049588) internal successors, (729), 726 states have internal predecessors, (729), 122 states have call successors, (122), 3 states have call predecessors, (122), 2 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 18:20:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 972 transitions. [2022-01-31 18:20:43,710 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 972 transitions. Word has length 249 [2022-01-31 18:20:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:43,710 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 972 transitions. [2022-01-31 18:20:43,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 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 18:20:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 972 transitions. [2022-01-31 18:20:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 18:20:43,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:43,711 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:43,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:20:43,711 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2138881142, now seen corresponding path program 119 times [2022-01-31 18:20:43,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:43,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546232235] [2022-01-31 18:20:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:43,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:43,713 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:43,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:43,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:47,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:47,822 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 18:20:47,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546232235] [2022-01-31 18:20:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [546232235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:47,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:20:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576415504] [2022-01-31 18:20:47,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:47,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:20:47,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:20:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:20:47,827 INFO L87 Difference]: Start difference. First operand 851 states and 972 transitions. Second operand has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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 18:20:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:55,571 INFO L93 Difference]: Finished difference Result 1466 states and 1710 transitions. [2022-01-31 18:20:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:20:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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 251 [2022-01-31 18:20:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:55,573 INFO L225 Difference]: With dead ends: 1466 [2022-01-31 18:20:55,573 INFO L226 Difference]: Without dead ends: 860 [2022-01-31 18:20:55,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:20:55,577 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1947 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 1377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1377 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:55,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 58 Invalid, 2826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1377 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:20:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-31 18:20:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 858. [2022-01-31 18:20:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 732 states have (on average 1.0040983606557377) internal successors, (735), 732 states have internal predecessors, (735), 123 states have call successors, (123), 3 states have call predecessors, (123), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-01-31 18:20:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 980 transitions. [2022-01-31 18:20:55,776 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 980 transitions. Word has length 251 [2022-01-31 18:20:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:55,777 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 980 transitions. [2022-01-31 18:20:55,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 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 18:20:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 980 transitions. [2022-01-31 18:20:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 18:20:55,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:55,777 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:55,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:20:55,778 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1975734828, now seen corresponding path program 120 times [2022-01-31 18:20:55,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:55,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592762761] [2022-01-31 18:20:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:55,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:55,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:20:55,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:55,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:59,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:59,883 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 18:20:59,883 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592762761] [2022-01-31 18:20:59,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592762761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:59,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:59,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:20:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531730232] [2022-01-31 18:20:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:59,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:20:59,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:20:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:20:59,886 INFO L87 Difference]: Start difference. First operand 858 states and 980 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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 18:21:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:08,036 INFO L93 Difference]: Finished difference Result 1478 states and 1724 transitions. [2022-01-31 18:21:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:21:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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 253 [2022-01-31 18:21:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:08,038 INFO L225 Difference]: With dead ends: 1478 [2022-01-31 18:21:08,038 INFO L226 Difference]: Without dead ends: 867 [2022-01-31 18:21:08,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:21:08,041 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2270 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 1592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2271 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1592 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:08,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2271 Valid, 48 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1592 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-31 18:21:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 865. [2022-01-31 18:21:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 738 states have (on average 1.0040650406504066) internal successors, (741), 738 states have internal predecessors, (741), 124 states have call successors, (124), 3 states have call predecessors, (124), 2 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 18:21:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 988 transitions. [2022-01-31 18:21:08,252 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 988 transitions. Word has length 253 [2022-01-31 18:21:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:08,253 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 988 transitions. [2022-01-31 18:21:08,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 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 18:21:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 988 transitions. [2022-01-31 18:21:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 18:21:08,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:08,253 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:08,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:21:08,254 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -456802382, now seen corresponding path program 121 times [2022-01-31 18:21:08,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:08,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948545306] [2022-01-31 18:21:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:08,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:08,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:08,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:08,263 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:12,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:12,440 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:12,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948545306] [2022-01-31 18:21:12,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1948545306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:12,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:12,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:21:12,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903837105] [2022-01-31 18:21:12,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:12,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:21:12,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:12,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:21:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:21:12,444 INFO L87 Difference]: Start difference. First operand 865 states and 988 transitions. Second operand has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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 18:21:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:20,743 INFO L93 Difference]: Finished difference Result 1490 states and 1738 transitions. [2022-01-31 18:21:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:21:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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 255 [2022-01-31 18:21:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:20,745 INFO L225 Difference]: With dead ends: 1490 [2022-01-31 18:21:20,745 INFO L226 Difference]: Without dead ends: 874 [2022-01-31 18:21:20,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:21:20,748 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2263 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 1587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2264 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1587 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:20,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2264 Valid, 48 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1587 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-31 18:21:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2022-01-31 18:21:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 744 states have (on average 1.0040322580645162) internal successors, (747), 744 states have internal predecessors, (747), 125 states have call successors, (125), 3 states have call predecessors, (125), 2 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2022-01-31 18:21:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 996 transitions. [2022-01-31 18:21:20,956 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 996 transitions. Word has length 255 [2022-01-31 18:21:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:20,956 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 996 transitions. [2022-01-31 18:21:20,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 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 18:21:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 996 transitions. [2022-01-31 18:21:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 18:21:20,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:20,957 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:20,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:21:20,957 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:20,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1051602416, now seen corresponding path program 122 times [2022-01-31 18:21:20,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:20,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059887225] [2022-01-31 18:21:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:20,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:20,958 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:20,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:20,966 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:25,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:25,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059887225] [2022-01-31 18:21:25,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059887225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:25,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:21:25,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268463383] [2022-01-31 18:21:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:25,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:21:25,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:21:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:21:25,214 INFO L87 Difference]: Start difference. First operand 872 states and 996 transitions. Second operand has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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 18:21:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:33,969 INFO L93 Difference]: Finished difference Result 1502 states and 1752 transitions. [2022-01-31 18:21:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:21:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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 257 [2022-01-31 18:21:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:33,971 INFO L225 Difference]: With dead ends: 1502 [2022-01-31 18:21:33,971 INFO L226 Difference]: Without dead ends: 881 [2022-01-31 18:21:33,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:21:33,974 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2316 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1622 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:33,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2317 Valid, 43 Invalid, 3149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1622 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:21:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-31 18:21:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2022-01-31 18:21:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 750 states have (on average 1.004) internal successors, (753), 750 states have internal predecessors, (753), 126 states have call successors, (126), 3 states have call predecessors, (126), 2 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2022-01-31 18:21:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1004 transitions. [2022-01-31 18:21:34,188 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1004 transitions. Word has length 257 [2022-01-31 18:21:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:34,188 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1004 transitions. [2022-01-31 18:21:34,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 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 18:21:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1004 transitions. [2022-01-31 18:21:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 18:21:34,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:34,189 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:34,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:21:34,189 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1423784722, now seen corresponding path program 123 times [2022-01-31 18:21:34,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274895958] [2022-01-31 18:21:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:34,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:34,191 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:34,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:34,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:38,539 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:38,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274895958] [2022-01-31 18:21:38,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274895958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:38,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:38,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:21:38,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778441365] [2022-01-31 18:21:38,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:38,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:21:38,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:21:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:21:38,543 INFO L87 Difference]: Start difference. First operand 879 states and 1004 transitions. Second operand has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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 18:21:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:47,282 INFO L93 Difference]: Finished difference Result 1514 states and 1766 transitions. [2022-01-31 18:21:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:21:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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 259 [2022-01-31 18:21:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:47,285 INFO L225 Difference]: With dead ends: 1514 [2022-01-31 18:21:47,285 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 18:21:47,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:21:47,288 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2297 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:47,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2298 Valid, 43 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:21:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 18:21:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 886. [2022-01-31 18:21:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 756 states have (on average 1.003968253968254) internal successors, (759), 756 states have internal predecessors, (759), 127 states have call successors, (127), 3 states have call predecessors, (127), 2 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2022-01-31 18:21:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1012 transitions. [2022-01-31 18:21:47,506 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1012 transitions. Word has length 259 [2022-01-31 18:21:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:47,506 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1012 transitions. [2022-01-31 18:21:47,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 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 18:21:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1012 transitions. [2022-01-31 18:21:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 18:21:47,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:47,507 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:47,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:21:47,507 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1686272076, now seen corresponding path program 124 times [2022-01-31 18:21:47,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:47,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796103292] [2022-01-31 18:21:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:47,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:47,508 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:21:47,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:47,516 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:51,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:51,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:51,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796103292] [2022-01-31 18:21:51,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [796103292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:51,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:51,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:21:51,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547053904] [2022-01-31 18:21:51,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:51,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:21:51,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:21:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:21:51,921 INFO L87 Difference]: Start difference. First operand 886 states and 1012 transitions. Second operand has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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) [2022-01-31 18:22:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:00,662 INFO L93 Difference]: Finished difference Result 1526 states and 1780 transitions. [2022-01-31 18:22:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 18:22:00,662 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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) Word has length 261 [2022-01-31 18:22:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:00,664 INFO L225 Difference]: With dead ends: 1526 [2022-01-31 18:22:00,664 INFO L226 Difference]: Without dead ends: 895 [2022-01-31 18:22:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 18:22:00,667 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2497 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 1746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:00,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2498 Valid, 33 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1746 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:22:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-31 18:22:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 893. [2022-01-31 18:22:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 762 states have (on average 1.0039370078740157) internal successors, (765), 762 states have internal predecessors, (765), 128 states have call successors, (128), 3 states have call predecessors, (128), 2 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-01-31 18:22:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1020 transitions. [2022-01-31 18:22:00,892 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1020 transitions. Word has length 261 [2022-01-31 18:22:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1020 transitions. [2022-01-31 18:22:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 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) [2022-01-31 18:22:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1020 transitions. [2022-01-31 18:22:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 18:22:00,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:00,894 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:00,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 18:22:00,894 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1153616938, now seen corresponding path program 125 times [2022-01-31 18:22:00,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:00,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317519314] [2022-01-31 18:22:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:00,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:00,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:00,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:00,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:05,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317519314] [2022-01-31 18:22:05,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317519314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:05,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:05,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 18:22:05,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738109861] [2022-01-31 18:22:05,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 18:22:05,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 18:22:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:22:05,553 INFO L87 Difference]: Start difference. First operand 893 states and 1020 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:14,521 INFO L93 Difference]: Finished difference Result 1538 states and 1794 transitions. [2022-01-31 18:22:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 18:22:14,521 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 18:22:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:14,523 INFO L225 Difference]: With dead ends: 1538 [2022-01-31 18:22:14,523 INFO L226 Difference]: Without dead ends: 902 [2022-01-31 18:22:14,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 18:22:14,526 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2028 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:14,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2029 Valid, 58 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-01-31 18:22:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 900. [2022-01-31 18:22:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 768 states have (on average 1.00390625) internal successors, (771), 768 states have internal predecessors, (771), 129 states have call successors, (129), 3 states have call predecessors, (129), 2 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2022-01-31 18:22:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1028 transitions. [2022-01-31 18:22:14,731 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1028 transitions. Word has length 263 [2022-01-31 18:22:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:14,731 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1028 transitions. [2022-01-31 18:22:14,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1028 transitions. [2022-01-31 18:22:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 18:22:14,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:14,732 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:14,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 18:22:14,732 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash 373137544, now seen corresponding path program 126 times [2022-01-31 18:22:14,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:14,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024401148] [2022-01-31 18:22:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:14,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:14,733 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:14,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:14,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:19,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024401148] [2022-01-31 18:22:19,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024401148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:19,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:19,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 18:22:19,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859900781] [2022-01-31 18:22:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:19,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 18:22:19,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 18:22:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 18:22:19,274 INFO L87 Difference]: Start difference. First operand 900 states and 1028 transitions. Second operand has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:28,300 INFO L93 Difference]: Finished difference Result 1550 states and 1808 transitions. [2022-01-31 18:22:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 18:22:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have 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 18:22:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:28,302 INFO L225 Difference]: With dead ends: 1550 [2022-01-31 18:22:28,302 INFO L226 Difference]: Without dead ends: 909 [2022-01-31 18:22:28,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 18:22:28,305 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2249 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 1582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1582 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:28,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2250 Valid, 53 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1582 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:28,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-31 18:22:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 907. [2022-01-31 18:22:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 774 states have (on average 1.003875968992248) internal successors, (777), 774 states have internal predecessors, (777), 130 states have call successors, (130), 3 states have call predecessors, (130), 2 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-01-31 18:22:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1036 transitions. [2022-01-31 18:22:28,539 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1036 transitions. Word has length 265 [2022-01-31 18:22:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:28,539 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1036 transitions. [2022-01-31 18:22:28,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1036 transitions. [2022-01-31 18:22:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 18:22:28,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:28,540 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:28,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 18:22:28,541 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1951716710, now seen corresponding path program 127 times [2022-01-31 18:22:28,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:28,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773808479] [2022-01-31 18:22:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:28,542 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:28,542 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:28,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:28,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:33,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:33,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773808479] [2022-01-31 18:22:33,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773808479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:33,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:33,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 18:22:33,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388026963] [2022-01-31 18:22:33,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:33,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 18:22:33,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 18:22:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:22:33,212 INFO L87 Difference]: Start difference. First operand 907 states and 1036 transitions. Second operand has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:42,281 INFO L93 Difference]: Finished difference Result 1562 states and 1822 transitions. [2022-01-31 18:22:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 18:22:42,281 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 18:22:42,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:42,283 INFO L225 Difference]: With dead ends: 1562 [2022-01-31 18:22:42,283 INFO L226 Difference]: Without dead ends: 916 [2022-01-31 18:22:42,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 18:22:42,287 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2257 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 1591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1591 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:42,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2258 Valid, 38 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1591 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:22:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-31 18:22:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 914. [2022-01-31 18:22:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 780 states have (on average 1.0038461538461538) internal successors, (783), 780 states have internal predecessors, (783), 131 states have call successors, (131), 3 states have call predecessors, (131), 2 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2022-01-31 18:22:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1044 transitions. [2022-01-31 18:22:42,528 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1044 transitions. Word has length 267 [2022-01-31 18:22:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:42,529 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1044 transitions. [2022-01-31 18:22:42,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1044 transitions. [2022-01-31 18:22:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 18:22:42,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:42,529 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:42,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 18:22:42,530 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1452127548, now seen corresponding path program 128 times [2022-01-31 18:22:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304345575] [2022-01-31 18:22:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:42,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:42,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:42,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:42,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:47,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:47,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304345575] [2022-01-31 18:22:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1304345575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:47,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:47,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 18:22:47,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143433311] [2022-01-31 18:22:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 18:22:47,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 18:22:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 18:22:47,218 INFO L87 Difference]: Start difference. First operand 914 states and 1044 transitions. Second operand has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:56,542 INFO L93 Difference]: Finished difference Result 1574 states and 1836 transitions. [2022-01-31 18:22:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 18:22:56,542 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 18:22:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:56,543 INFO L225 Difference]: With dead ends: 1574 [2022-01-31 18:22:56,543 INFO L226 Difference]: Without dead ends: 923 [2022-01-31 18:22:56,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 18:22:56,547 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2286 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 1609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1609 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:56,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 43 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1609 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:22:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-31 18:22:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 921. [2022-01-31 18:22:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 786 states have (on average 1.0038167938931297) internal successors, (789), 786 states have internal predecessors, (789), 132 states have call successors, (132), 3 states have call predecessors, (132), 2 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-01-31 18:22:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1052 transitions. [2022-01-31 18:22:56,759 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1052 transitions. Word has length 269 [2022-01-31 18:22:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:56,759 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1052 transitions. [2022-01-31 18:22:56,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1052 transitions. [2022-01-31 18:22:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 18:22:56,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:56,760 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:56,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 18:22:56,760 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 218620066, now seen corresponding path program 129 times [2022-01-31 18:22:56,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117324176] [2022-01-31 18:22:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:56,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:56,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:22:56,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:56,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:01,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:01,509 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 18:23:01,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117324176] [2022-01-31 18:23:01,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1117324176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:01,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:01,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 18:23:01,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54530054] [2022-01-31 18:23:01,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 18:23:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 18:23:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:23:01,513 INFO L87 Difference]: Start difference. First operand 921 states and 1052 transitions. Second operand has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:11,081 INFO L93 Difference]: Finished difference Result 1586 states and 1850 transitions. [2022-01-31 18:23:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 18:23:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 18:23:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:11,083 INFO L225 Difference]: With dead ends: 1586 [2022-01-31 18:23:11,083 INFO L226 Difference]: Without dead ends: 930 [2022-01-31 18:23:11,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 18:23:11,087 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2792 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 1950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2793 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1950 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:11,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2793 Valid, 28 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1950 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:23:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-31 18:23:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 928. [2022-01-31 18:23:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 792 states have (on average 1.003787878787879) internal successors, (795), 792 states have internal predecessors, (795), 133 states have call successors, (133), 3 states have call predecessors, (133), 2 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 18:23:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1060 transitions. [2022-01-31 18:23:11,325 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1060 transitions. Word has length 271 [2022-01-31 18:23:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:11,325 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1060 transitions. [2022-01-31 18:23:11,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1060 transitions. [2022-01-31 18:23:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 18:23:11,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:11,326 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 18:23:11,327 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash -510691584, now seen corresponding path program 130 times [2022-01-31 18:23:11,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:11,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610531051] [2022-01-31 18:23:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:11,328 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:11,328 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:11,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:11,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:16,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:16,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610531051] [2022-01-31 18:23:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [610531051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:16,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:16,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 18:23:16,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781997251] [2022-01-31 18:23:16,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:16,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 18:23:16,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 18:23:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 18:23:16,132 INFO L87 Difference]: Start difference. First operand 928 states and 1060 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:25,716 INFO L93 Difference]: Finished difference Result 1598 states and 1864 transitions. [2022-01-31 18:23:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 18:23:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have 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 18:23:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:25,718 INFO L225 Difference]: With dead ends: 1598 [2022-01-31 18:23:25,718 INFO L226 Difference]: Without dead ends: 937 [2022-01-31 18:23:25,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 18:23:25,722 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2371 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 1668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1668 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:25,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2372 Valid, 43 Invalid, 3274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1668 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:23:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-31 18:23:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 935. [2022-01-31 18:23:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 798 states have (on average 1.0037593984962405) internal successors, (801), 798 states have internal predecessors, (801), 134 states have call successors, (134), 3 states have call predecessors, (134), 2 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 18:23:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1068 transitions. [2022-01-31 18:23:25,959 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1068 transitions. Word has length 273 [2022-01-31 18:23:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:25,959 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1068 transitions. [2022-01-31 18:23:25,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1068 transitions. [2022-01-31 18:23:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 18:23:25,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:25,960 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:25,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 18:23:25,960 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1299517986, now seen corresponding path program 131 times [2022-01-31 18:23:25,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:25,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378066833] [2022-01-31 18:23:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:25,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:25,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:25,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:25,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:30,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:30,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378066833] [2022-01-31 18:23:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [378066833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:30,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:30,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 18:23:30,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146602745] [2022-01-31 18:23:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:30,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 18:23:30,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 18:23:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:23:30,820 INFO L87 Difference]: Start difference. First operand 935 states and 1068 transitions. Second operand has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:40,678 INFO L93 Difference]: Finished difference Result 1610 states and 1878 transitions. [2022-01-31 18:23:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 18:23:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 18:23:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:40,680 INFO L225 Difference]: With dead ends: 1610 [2022-01-31 18:23:40,683 INFO L226 Difference]: Without dead ends: 944 [2022-01-31 18:23:40,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 18:23:40,690 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2382 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 1678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1678 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:40,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 63 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1678 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:23:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-31 18:23:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 942. [2022-01-31 18:23:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 804 states have (on average 1.0037313432835822) internal successors, (807), 804 states have internal predecessors, (807), 135 states have call successors, (135), 3 states have call predecessors, (135), 2 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-01-31 18:23:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1076 transitions. [2022-01-31 18:23:40,930 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1076 transitions. Word has length 275 [2022-01-31 18:23:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1076 transitions. [2022-01-31 18:23:40,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1076 transitions. [2022-01-31 18:23:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 18:23:40,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:40,931 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:40,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 18:23:40,931 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash 847521084, now seen corresponding path program 132 times [2022-01-31 18:23:40,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:40,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741028094] [2022-01-31 18:23:40,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:40,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:40,933 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:40,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:40,941 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:45,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:45,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:45,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741028094] [2022-01-31 18:23:45,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741028094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:45,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:45,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 18:23:45,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375201103] [2022-01-31 18:23:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:45,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 18:23:45,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 18:23:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 18:23:45,873 INFO L87 Difference]: Start difference. First operand 942 states and 1076 transitions. Second operand has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:55,767 INFO L93 Difference]: Finished difference Result 1622 states and 1892 transitions. [2022-01-31 18:23:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 18:23:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 18:23:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:55,769 INFO L225 Difference]: With dead ends: 1622 [2022-01-31 18:23:55,769 INFO L226 Difference]: Without dead ends: 951 [2022-01-31 18:23:55,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 18:23:55,773 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2243 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 1583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1583 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:55,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2244 Valid, 48 Invalid, 3192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1583 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:23:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-31 18:23:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 949. [2022-01-31 18:23:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 810 states have (on average 1.0037037037037038) internal successors, (813), 810 states have internal predecessors, (813), 136 states have call successors, (136), 3 states have call predecessors, (136), 2 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2022-01-31 18:23:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1084 transitions. [2022-01-31 18:23:56,018 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1084 transitions. Word has length 277 [2022-01-31 18:23:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:56,018 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1084 transitions. [2022-01-31 18:23:56,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1084 transitions. [2022-01-31 18:23:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 18:23:56,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:56,019 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:56,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 18:23:56,020 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1727202022, now seen corresponding path program 133 times [2022-01-31 18:23:56,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944723794] [2022-01-31 18:23:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:56,021 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:56,021 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:23:56,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:56,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat