/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:15:54,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:15:54,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:15:54,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:15:54,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 00:15:54,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:15:54,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:15:54,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:15:54,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:15:54,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:15:54,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:15:54,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:15:54,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:15:54,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:15:54,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:15:54,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:15:54,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:15:54,344 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:15:54,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:15:54,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:15:54,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:15:54,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:15:54,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:15:54,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:15:54,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:15:54,527 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:15:54,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2022-01-10 00:15:54,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/621d37b16/8d953838d71043779e0b8b4c66328891/FLAG95e1225b2 [2022-01-10 00:15:55,144 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:15:55,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label12.c [2022-01-10 00:15:55,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/621d37b16/8d953838d71043779e0b8b4c66328891/FLAG95e1225b2 [2022-01-10 00:15:55,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/621d37b16/8d953838d71043779e0b8b4c66328891 [2022-01-10 00:15:55,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:15:55,338 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:15:55,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:15:55,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:15:55,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:15:55,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:15:55" (1/1) ... [2022-01-10 00:15:55,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109d5978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:55, skipping insertion in model container [2022-01-10 00:15:55,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:15:55" (1/1) ... [2022-01-10 00:15:55,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:15:55,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:15:55,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label12.c[7168,7181] [2022-01-10 00:15:55,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:15:55,911 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:15:55,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label12.c[7168,7181] [2022-01-10 00:15:56,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:15:56,078 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:15:56,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56 WrapperNode [2022-01-10 00:15:56,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:15:56,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:15:56,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:15:56,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:15:56,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,239 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2022-01-10 00:15:56,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:15:56,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:15:56,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:15:56,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:15:56,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:15:56,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:15:56,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:15:56,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:15:56,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (1/1) ... [2022-01-10 00:15:56,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:15:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:15:56,407 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) [2022-01-10 00:15:56,412 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 [2022-01-10 00:15:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:15:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:15:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:15:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:15:56,631 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:15:56,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:15:58,497 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:15:58,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:15:58,504 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:15:58,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:15:58 BoogieIcfgContainer [2022-01-10 00:15:58,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:15:58,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:15:58,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:15:58,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:15:58,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:15:55" (1/3) ... [2022-01-10 00:15:58,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6a8062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:15:58, skipping insertion in model container [2022-01-10 00:15:58,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:56" (2/3) ... [2022-01-10 00:15:58,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6a8062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:15:58, skipping insertion in model container [2022-01-10 00:15:58,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:15:58" (3/3) ... [2022-01-10 00:15:58,511 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2022-01-10 00:15:58,515 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:15:58,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:15:58,544 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:15:58,549 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=FAST_UPR [2022-01-10 00:15:58,549 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:15:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:15:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 00:15:58,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:58,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:15:58,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 118092897, now seen corresponding path program 1 times [2022-01-10 00:15:58,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:58,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263544656] [2022-01-10 00:15:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:58,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:15:58,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263544656] [2022-01-10 00:15:58,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263544656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:58,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:58,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:58,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224006554] [2022-01-10 00:15:58,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:58,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:58,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:58,837 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:00,600 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2022-01-10 00:16:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-01-10 00:16:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:00,612 INFO L225 Difference]: With dead ends: 1154 [2022-01-10 00:16:00,612 INFO L226 Difference]: Without dead ends: 665 [2022-01-10 00:16:00,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:00,617 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 262 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:00,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 00:16:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-10 00:16:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2022-01-10 00:16:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2022-01-10 00:16:00,664 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 59 [2022-01-10 00:16:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:00,664 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2022-01-10 00:16:00,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2022-01-10 00:16:00,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 00:16:00,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:00,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:00,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:16:00,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1794665063, now seen corresponding path program 1 times [2022-01-10 00:16:00,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:00,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549744472] [2022-01-10 00:16:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:00,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:16:00,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:00,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549744472] [2022-01-10 00:16:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549744472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:00,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:00,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:16:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128023836] [2022-01-10 00:16:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:00,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:00,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:00,752 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:02,108 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2022-01-10 00:16:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-01-10 00:16:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:02,111 INFO L225 Difference]: With dead ends: 1624 [2022-01-10 00:16:02,112 INFO L226 Difference]: Without dead ends: 963 [2022-01-10 00:16:02,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:02,113 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:02,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 00:16:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-10 00:16:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2022-01-10 00:16:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2022-01-10 00:16:02,132 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 124 [2022-01-10 00:16:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:02,132 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2022-01-10 00:16:02,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2022-01-10 00:16:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 00:16:02,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:02,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:02,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:16:02,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1505786198, now seen corresponding path program 1 times [2022-01-10 00:16:02,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942745532] [2022-01-10 00:16:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:02,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:16:02,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942745532] [2022-01-10 00:16:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942745532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:02,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:02,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:02,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349038137] [2022-01-10 00:16:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:02,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 00:16:02,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:02,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 00:16:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:16:02,213 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:03,838 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2022-01-10 00:16:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-01-10 00:16:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:03,845 INFO L225 Difference]: With dead ends: 2244 [2022-01-10 00:16:03,845 INFO L226 Difference]: Without dead ends: 1582 [2022-01-10 00:16:03,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:16:03,846 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:03,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 365 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 00:16:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-01-10 00:16:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2022-01-10 00:16:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2022-01-10 00:16:03,865 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 129 [2022-01-10 00:16:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2022-01-10 00:16:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2022-01-10 00:16:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-10 00:16:03,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:03,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:03,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:16:03,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1334591182, now seen corresponding path program 1 times [2022-01-10 00:16:03,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:03,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700399161] [2022-01-10 00:16:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:03,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:16:03,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700399161] [2022-01-10 00:16:03,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700399161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:03,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:03,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:03,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080496323] [2022-01-10 00:16:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:03,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:03,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:03,994 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:06,297 INFO L93 Difference]: Finished difference Result 4670 states and 6170 transitions. [2022-01-10 00:16:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:06,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2022-01-10 00:16:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:06,307 INFO L225 Difference]: With dead ends: 4670 [2022-01-10 00:16:06,307 INFO L226 Difference]: Without dead ends: 3406 [2022-01-10 00:16:06,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:06,317 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 490 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:06,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 348 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 00:16:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2022-01-10 00:16:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3381. [2022-01-10 00:16:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2366863905325445) internal successors, (4180), 3380 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4180 transitions. [2022-01-10 00:16:06,360 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4180 transitions. Word has length 225 [2022-01-10 00:16:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:06,361 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4180 transitions. [2022-01-10 00:16:06,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4180 transitions. [2022-01-10 00:16:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-10 00:16:06,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:06,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:06,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 00:16:06,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 385527484, now seen corresponding path program 1 times [2022-01-10 00:16:06,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77971683] [2022-01-10 00:16:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:06,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 00:16:06,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:06,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77971683] [2022-01-10 00:16:06,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77971683] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:06,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:06,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:16:06,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417824776] [2022-01-10 00:16:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:06,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:06,490 INFO L87 Difference]: Start difference. First operand 3381 states and 4180 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:07,631 INFO L93 Difference]: Finished difference Result 8563 states and 10754 transitions. [2022-01-10 00:16:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:07,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-01-10 00:16:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:07,644 INFO L225 Difference]: With dead ends: 8563 [2022-01-10 00:16:07,645 INFO L226 Difference]: Without dead ends: 5483 [2022-01-10 00:16:07,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:07,650 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:07,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 00:16:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2022-01-10 00:16:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2022-01-10 00:16:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.16870549570933) internal successors, (6401), 5477 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6401 transitions. [2022-01-10 00:16:07,749 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6401 transitions. Word has length 229 [2022-01-10 00:16:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:07,749 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6401 transitions. [2022-01-10 00:16:07,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6401 transitions. [2022-01-10 00:16:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-10 00:16:07,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:07,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:07,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:16:07,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1064012372, now seen corresponding path program 1 times [2022-01-10 00:16:07,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:07,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971287593] [2022-01-10 00:16:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:07,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 00:16:07,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971287593] [2022-01-10 00:16:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971287593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:07,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:07,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:16:07,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463133649] [2022-01-10 00:16:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:07,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:07,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:07,904 INFO L87 Difference]: Start difference. First operand 5478 states and 6401 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:08,993 INFO L93 Difference]: Finished difference Result 10655 states and 12489 transitions. [2022-01-10 00:16:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2022-01-10 00:16:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:09,005 INFO L225 Difference]: With dead ends: 10655 [2022-01-10 00:16:09,006 INFO L226 Difference]: Without dead ends: 5478 [2022-01-10 00:16:09,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:09,011 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:09,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:16:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2022-01-10 00:16:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2022-01-10 00:16:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1676100054774512) internal successors, (6395), 5477 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6395 transitions. [2022-01-10 00:16:09,072 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6395 transitions. Word has length 331 [2022-01-10 00:16:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:09,073 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6395 transitions. [2022-01-10 00:16:09,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6395 transitions. [2022-01-10 00:16:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-10 00:16:09,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:09,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:09,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:16:09,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:09,077 INFO L85 PathProgramCache]: Analyzing trace with hash 131002693, now seen corresponding path program 1 times [2022-01-10 00:16:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:09,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363838140] [2022-01-10 00:16:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:09,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 00:16:09,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:09,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363838140] [2022-01-10 00:16:09,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363838140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:09,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:09,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:09,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602003524] [2022-01-10 00:16:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:09,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:09,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:09,196 INFO L87 Difference]: Start difference. First operand 5478 states and 6395 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:10,675 INFO L93 Difference]: Finished difference Result 11851 states and 14151 transitions. [2022-01-10 00:16:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 346 [2022-01-10 00:16:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:10,692 INFO L225 Difference]: With dead ends: 11851 [2022-01-10 00:16:10,693 INFO L226 Difference]: Without dead ends: 6674 [2022-01-10 00:16:10,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:10,697 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 256 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:10,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:16:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2022-01-10 00:16:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4876. [2022-01-10 00:16:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 1.1805128205128206) internal successors, (5755), 4875 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 5755 transitions. [2022-01-10 00:16:10,815 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 5755 transitions. Word has length 346 [2022-01-10 00:16:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:10,816 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 5755 transitions. [2022-01-10 00:16:10,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 5755 transitions. [2022-01-10 00:16:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-10 00:16:10,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:10,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:10,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 00:16:10,820 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1130119938, now seen corresponding path program 1 times [2022-01-10 00:16:10,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:10,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885638423] [2022-01-10 00:16:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:10,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:16:11,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885638423] [2022-01-10 00:16:11,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885638423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515298565] [2022-01-10 00:16:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:11,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:11,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:11,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:11,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 00:16:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 00:16:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:16:11,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:16:11,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515298565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:11,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:16:11,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-10 00:16:11,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448652424] [2022-01-10 00:16:11,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:11,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:11,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:11,833 INFO L87 Difference]: Start difference. First operand 4876 states and 5755 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:13,135 INFO L93 Difference]: Finished difference Result 11855 states and 14250 transitions. [2022-01-10 00:16:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 405 [2022-01-10 00:16:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:13,150 INFO L225 Difference]: With dead ends: 11855 [2022-01-10 00:16:13,150 INFO L226 Difference]: Without dead ends: 7280 [2022-01-10 00:16:13,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:13,154 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:13,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 345 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 00:16:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7280 states. [2022-01-10 00:16:13,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7280 to 6679. [2022-01-10 00:16:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6678 states have (on average 1.1647199760407307) internal successors, (7778), 6678 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 7778 transitions. [2022-01-10 00:16:13,220 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 7778 transitions. Word has length 405 [2022-01-10 00:16:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:13,220 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 7778 transitions. [2022-01-10 00:16:13,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 7778 transitions. [2022-01-10 00:16:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-10 00:16:13,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:13,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:13,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 00:16:13,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:13,456 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1682645463, now seen corresponding path program 1 times [2022-01-10 00:16:13,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131939460] [2022-01-10 00:16:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:13,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 00:16:13,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131939460] [2022-01-10 00:16:13,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131939460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618774093] [2022-01-10 00:16:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:13,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:13,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:13,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 00:16:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 00:16:13,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 00:16:14,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:16:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 00:16:16,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618774093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:16:16,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:16:16,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 00:16:16,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412280753] [2022-01-10 00:16:16,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:16:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 00:16:16,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 00:16:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 00:16:16,197 INFO L87 Difference]: Start difference. First operand 6679 states and 7778 transitions. Second operand has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:21,147 INFO L93 Difference]: Finished difference Result 19597 states and 22611 transitions. [2022-01-10 00:16:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 00:16:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 422 [2022-01-10 00:16:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:21,200 INFO L225 Difference]: With dead ends: 19597 [2022-01-10 00:16:21,200 INFO L226 Difference]: Without dead ends: 7876 [2022-01-10 00:16:21,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-10 00:16:21,211 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2932 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5835 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2932 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 5835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:21,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2932 Valid, 286 Invalid, 6509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 5835 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-10 00:16:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2022-01-10 00:16:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6976. [2022-01-10 00:16:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6976 states, 6975 states have (on average 1.1105376344086022) internal successors, (7746), 6975 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6976 states to 6976 states and 7746 transitions. [2022-01-10 00:16:21,343 INFO L78 Accepts]: Start accepts. Automaton has 6976 states and 7746 transitions. Word has length 422 [2022-01-10 00:16:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 6976 states and 7746 transitions. [2022-01-10 00:16:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6976 states and 7746 transitions. [2022-01-10 00:16:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-01-10 00:16:21,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:21,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:21,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 00:16:21,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-10 00:16:21,574 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1464529448, now seen corresponding path program 1 times [2022-01-10 00:16:21,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222494994] [2022-01-10 00:16:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:21,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-01-10 00:16:21,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:21,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222494994] [2022-01-10 00:16:21,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222494994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:21,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:21,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:21,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953251569] [2022-01-10 00:16:21,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:21,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:21,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:21,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:21,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:21,810 INFO L87 Difference]: Start difference. First operand 6976 states and 7746 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:22,762 INFO L93 Difference]: Finished difference Result 15446 states and 17263 transitions. [2022-01-10 00:16:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2022-01-10 00:16:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:22,775 INFO L225 Difference]: With dead ends: 15446 [2022-01-10 00:16:22,776 INFO L226 Difference]: Without dead ends: 8472 [2022-01-10 00:16:22,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:22,781 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 267 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:22,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 554 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8472 states. [2022-01-10 00:16:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8472 to 8171. [2022-01-10 00:16:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.088984088127295) internal successors, (8897), 8170 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 8897 transitions. [2022-01-10 00:16:22,924 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 8897 transitions. Word has length 436 [2022-01-10 00:16:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:22,925 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 8897 transitions. [2022-01-10 00:16:22,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 8897 transitions. [2022-01-10 00:16:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-01-10 00:16:22,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:22,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:22,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 00:16:22,929 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2118497435, now seen corresponding path program 1 times [2022-01-10 00:16:22,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:22,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656489214] [2022-01-10 00:16:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:22,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-01-10 00:16:23,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656489214] [2022-01-10 00:16:23,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656489214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:23,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:23,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:23,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848002586] [2022-01-10 00:16:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:23,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:23,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:23,089 INFO L87 Difference]: Start difference. First operand 8171 states and 8897 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:24,115 INFO L93 Difference]: Finished difference Result 18731 states and 20550 transitions. [2022-01-10 00:16:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2022-01-10 00:16:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:24,133 INFO L225 Difference]: With dead ends: 18731 [2022-01-10 00:16:24,133 INFO L226 Difference]: Without dead ends: 10562 [2022-01-10 00:16:24,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:24,142 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 271 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:24,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 202 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:16:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2022-01-10 00:16:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 9963. [2022-01-10 00:16:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 1.0847219433848625) internal successors, (10806), 9962 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 10806 transitions. [2022-01-10 00:16:24,245 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 10806 transitions. Word has length 533 [2022-01-10 00:16:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:24,245 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 10806 transitions. [2022-01-10 00:16:24,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 10806 transitions. [2022-01-10 00:16:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2022-01-10 00:16:24,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:24,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:24,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 00:16:24,250 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1773865919, now seen corresponding path program 1 times [2022-01-10 00:16:24,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:24,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884387440] [2022-01-10 00:16:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:24,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-01-10 00:16:24,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:24,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884387440] [2022-01-10 00:16:24,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884387440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:24,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:24,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:24,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014663148] [2022-01-10 00:16:24,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:24,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:24,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:24,389 INFO L87 Difference]: Start difference. First operand 9963 states and 10806 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:25,263 INFO L93 Difference]: Finished difference Result 19922 states and 21652 transitions. [2022-01-10 00:16:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 560 [2022-01-10 00:16:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:25,275 INFO L225 Difference]: With dead ends: 19922 [2022-01-10 00:16:25,276 INFO L226 Difference]: Without dead ends: 10260 [2022-01-10 00:16:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:25,283 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:25,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2022-01-10 00:16:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 9961. [2022-01-10 00:16:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9961 states, 9960 states have (on average 1.0845381526104418) internal successors, (10802), 9960 states have internal predecessors, (10802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 10802 transitions. [2022-01-10 00:16:25,480 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 10802 transitions. Word has length 560 [2022-01-10 00:16:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:25,480 INFO L470 AbstractCegarLoop]: Abstraction has 9961 states and 10802 transitions. [2022-01-10 00:16:25,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 10802 transitions. [2022-01-10 00:16:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-10 00:16:25,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:25,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:25,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 00:16:25,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -566181386, now seen corresponding path program 1 times [2022-01-10 00:16:25,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:25,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11261451] [2022-01-10 00:16:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:25,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-01-10 00:16:25,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11261451] [2022-01-10 00:16:25,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11261451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:25,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:25,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:25,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284657446] [2022-01-10 00:16:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:25,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:25,676 INFO L87 Difference]: Start difference. First operand 9961 states and 10802 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:26,704 INFO L93 Difference]: Finished difference Result 22611 states and 24594 transitions. [2022-01-10 00:16:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 586 [2022-01-10 00:16:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:26,717 INFO L225 Difference]: With dead ends: 22611 [2022-01-10 00:16:26,718 INFO L226 Difference]: Without dead ends: 12652 [2022-01-10 00:16:26,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:26,728 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 198 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 173 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:16:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2022-01-10 00:16:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 12054. [2022-01-10 00:16:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 12053 states have (on average 1.0817223927652866) internal successors, (13038), 12053 states have internal predecessors, (13038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 13038 transitions. [2022-01-10 00:16:26,822 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 13038 transitions. Word has length 586 [2022-01-10 00:16:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:26,822 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 13038 transitions. [2022-01-10 00:16:26,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 13038 transitions. [2022-01-10 00:16:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-01-10 00:16:26,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:26,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:26,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 00:16:26,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1867245461, now seen corresponding path program 1 times [2022-01-10 00:16:26,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687304840] [2022-01-10 00:16:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:26,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 264 proven. 188 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 00:16:27,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687304840] [2022-01-10 00:16:27,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687304840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007875491] [2022-01-10 00:16:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:27,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:27,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:27,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:27,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:16:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 00:16:27,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-01-10 00:16:28,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:16:28,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007875491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:28,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:16:28,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-01-10 00:16:28,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942932217] [2022-01-10 00:16:28,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:28,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:28,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:28,120 INFO L87 Difference]: Start difference. First operand 12054 states and 13038 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:29,638 INFO L93 Difference]: Finished difference Result 35839 states and 38890 transitions. [2022-01-10 00:16:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 594 [2022-01-10 00:16:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:29,662 INFO L225 Difference]: With dead ends: 35839 [2022-01-10 00:16:29,663 INFO L226 Difference]: Without dead ends: 24086 [2022-01-10 00:16:29,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:29,673 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 619 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:29,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 154 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:16:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24086 states. [2022-01-10 00:16:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24086 to 20489. [2022-01-10 00:16:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20488 states have (on average 1.0808766106989458) internal successors, (22145), 20488 states have internal predecessors, (22145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 22145 transitions. [2022-01-10 00:16:29,866 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 22145 transitions. Word has length 594 [2022-01-10 00:16:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:29,866 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 22145 transitions. [2022-01-10 00:16:29,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 22145 transitions. [2022-01-10 00:16:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-01-10 00:16:29,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:29,872 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:29,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 00:16:30,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:30,089 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:30,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1852804858, now seen corresponding path program 1 times [2022-01-10 00:16:30,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:30,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648599198] [2022-01-10 00:16:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:30,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-01-10 00:16:30,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:30,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648599198] [2022-01-10 00:16:30,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648599198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:30,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:30,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:30,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433385296] [2022-01-10 00:16:30,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:30,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:30,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:30,292 INFO L87 Difference]: Start difference. First operand 20489 states and 22145 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:31,261 INFO L93 Difference]: Finished difference Result 43666 states and 47508 transitions. [2022-01-10 00:16:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:31,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 638 [2022-01-10 00:16:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:31,284 INFO L225 Difference]: With dead ends: 43666 [2022-01-10 00:16:31,284 INFO L226 Difference]: Without dead ends: 24079 [2022-01-10 00:16:31,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:31,296 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 294 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:31,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 156 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:31,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24079 states. [2022-01-10 00:16:31,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24079 to 23779. [2022-01-10 00:16:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 1.080704853225671) internal successors, (25697), 23778 states have internal predecessors, (25697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 25697 transitions. [2022-01-10 00:16:31,501 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 25697 transitions. Word has length 638 [2022-01-10 00:16:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:31,502 INFO L470 AbstractCegarLoop]: Abstraction has 23779 states and 25697 transitions. [2022-01-10 00:16:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 25697 transitions. [2022-01-10 00:16:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2022-01-10 00:16:31,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:31,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:31,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 00:16:31,512 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 838645165, now seen corresponding path program 1 times [2022-01-10 00:16:31,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205142458] [2022-01-10 00:16:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:31,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-01-10 00:16:31,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:31,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205142458] [2022-01-10 00:16:31,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205142458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:31,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:31,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:31,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142902106] [2022-01-10 00:16:31,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:31,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:31,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:31,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:31,728 INFO L87 Difference]: Start difference. First operand 23779 states and 25697 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:32,633 INFO L93 Difference]: Finished difference Result 48167 states and 52010 transitions. [2022-01-10 00:16:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 688 [2022-01-10 00:16:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:32,655 INFO L225 Difference]: With dead ends: 48167 [2022-01-10 00:16:32,656 INFO L226 Difference]: Without dead ends: 24390 [2022-01-10 00:16:32,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:32,671 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 264 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:32,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 527 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24390 states. [2022-01-10 00:16:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24390 to 23477. [2022-01-10 00:16:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0772278071221673) internal successors, (25289), 23476 states have internal predecessors, (25289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25289 transitions. [2022-01-10 00:16:33,002 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25289 transitions. Word has length 688 [2022-01-10 00:16:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:33,002 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25289 transitions. [2022-01-10 00:16:33,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25289 transitions. [2022-01-10 00:16:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2022-01-10 00:16:33,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:33,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:33,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 00:16:33,015 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1597872221, now seen corresponding path program 1 times [2022-01-10 00:16:33,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:33,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863266279] [2022-01-10 00:16:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:33,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-01-10 00:16:33,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863266279] [2022-01-10 00:16:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863266279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:33,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:33,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:33,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898945429] [2022-01-10 00:16:33,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:33,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:33,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:33,212 INFO L87 Difference]: Start difference. First operand 23477 states and 25289 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:34,010 INFO L93 Difference]: Finished difference Result 46655 states and 50279 transitions. [2022-01-10 00:16:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 744 [2022-01-10 00:16:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:34,032 INFO L225 Difference]: With dead ends: 46655 [2022-01-10 00:16:34,032 INFO L226 Difference]: Without dead ends: 23479 [2022-01-10 00:16:34,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:34,047 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:34,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 107 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 00:16:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23479 states. [2022-01-10 00:16:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23479 to 23477. [2022-01-10 00:16:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0698585789742716) internal successors, (25116), 23476 states have internal predecessors, (25116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25116 transitions. [2022-01-10 00:16:34,442 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25116 transitions. Word has length 744 [2022-01-10 00:16:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:34,443 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25116 transitions. [2022-01-10 00:16:34,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25116 transitions. [2022-01-10 00:16:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2022-01-10 00:16:34,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:34,453 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:34,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 00:16:34,454 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1045679782, now seen corresponding path program 1 times [2022-01-10 00:16:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:34,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961351720] [2022-01-10 00:16:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 860 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-10 00:16:34,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961351720] [2022-01-10 00:16:34,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961351720] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:34,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:34,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:34,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063342795] [2022-01-10 00:16:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:34,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:34,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:34,668 INFO L87 Difference]: Start difference. First operand 23477 states and 25116 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:36,230 INFO L93 Difference]: Finished difference Result 49344 states and 52795 transitions. [2022-01-10 00:16:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 748 [2022-01-10 00:16:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:36,258 INFO L225 Difference]: With dead ends: 49344 [2022-01-10 00:16:36,258 INFO L226 Difference]: Without dead ends: 27666 [2022-01-10 00:16:36,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:36,275 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 587 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:36,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 435 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:16:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27666 states. [2022-01-10 00:16:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27666 to 27066. [2022-01-10 00:16:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27066 states, 27065 states have (on average 1.0520968039903935) internal successors, (28475), 27065 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27066 states to 27066 states and 28475 transitions. [2022-01-10 00:16:36,612 INFO L78 Accepts]: Start accepts. Automaton has 27066 states and 28475 transitions. Word has length 748 [2022-01-10 00:16:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:36,613 INFO L470 AbstractCegarLoop]: Abstraction has 27066 states and 28475 transitions. [2022-01-10 00:16:36,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 27066 states and 28475 transitions. [2022-01-10 00:16:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2022-01-10 00:16:36,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:36,779 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:36,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 00:16:36,779 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1871974769, now seen corresponding path program 1 times [2022-01-10 00:16:36,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178426617] [2022-01-10 00:16:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:36,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 571 proven. 188 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-01-10 00:16:37,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178426617] [2022-01-10 00:16:37,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178426617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712989095] [2022-01-10 00:16:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:37,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:37,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:37,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 00:16:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 00:16:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-01-10 00:16:38,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:16:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712989095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:38,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:16:38,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-01-10 00:16:38,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948921628] [2022-01-10 00:16:38,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:38,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:38,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:38,534 INFO L87 Difference]: Start difference. First operand 27066 states and 28475 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:39,753 INFO L93 Difference]: Finished difference Result 34277 states and 36072 transitions. [2022-01-10 00:16:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 750 [2022-01-10 00:16:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:39,786 INFO L225 Difference]: With dead ends: 34277 [2022-01-10 00:16:39,786 INFO L226 Difference]: Without dead ends: 34275 [2022-01-10 00:16:39,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:39,796 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 495 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:39,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 151 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 780 Invalid, 0 Unknown, 1037 Unchecked, 1.1s Time] [2022-01-10 00:16:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34275 states. [2022-01-10 00:16:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34275 to 30971. [2022-01-10 00:16:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0545689376816274) internal successors, (32660), 30970 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32660 transitions. [2022-01-10 00:16:40,194 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32660 transitions. Word has length 750 [2022-01-10 00:16:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:40,195 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32660 transitions. [2022-01-10 00:16:40,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32660 transitions. [2022-01-10 00:16:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2022-01-10 00:16:40,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:40,208 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:40,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 00:16:40,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:40,424 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1855722341, now seen corresponding path program 1 times [2022-01-10 00:16:40,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:40,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013359553] [2022-01-10 00:16:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:40,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 801 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-01-10 00:16:40,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013359553] [2022-01-10 00:16:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013359553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:40,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:40,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:40,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947089164] [2022-01-10 00:16:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:40,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:40,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:40,651 INFO L87 Difference]: Start difference. First operand 30971 states and 32660 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:41,614 INFO L93 Difference]: Finished difference Result 61641 states and 65017 transitions. [2022-01-10 00:16:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 768 [2022-01-10 00:16:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:41,644 INFO L225 Difference]: With dead ends: 61641 [2022-01-10 00:16:41,644 INFO L226 Difference]: Without dead ends: 30971 [2022-01-10 00:16:41,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:41,663 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 226 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:41,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30971 states. [2022-01-10 00:16:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30971 to 30971. [2022-01-10 00:16:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0424927349047466) internal successors, (32286), 30970 states have internal predecessors, (32286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32286 transitions. [2022-01-10 00:16:42,015 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32286 transitions. Word has length 768 [2022-01-10 00:16:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:42,016 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32286 transitions. [2022-01-10 00:16:42,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32286 transitions. [2022-01-10 00:16:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-01-10 00:16:42,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:42,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:42,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 00:16:42,027 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash -184573624, now seen corresponding path program 1 times [2022-01-10 00:16:42,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719737010] [2022-01-10 00:16:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:42,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-01-10 00:16:42,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719737010] [2022-01-10 00:16:42,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719737010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:42,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:42,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:42,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052036386] [2022-01-10 00:16:42,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:42,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:42,290 INFO L87 Difference]: Start difference. First operand 30971 states and 32286 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:43,194 INFO L93 Difference]: Finished difference Result 61933 states and 64625 transitions. [2022-01-10 00:16:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 770 [2022-01-10 00:16:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:43,225 INFO L225 Difference]: With dead ends: 61933 [2022-01-10 00:16:43,225 INFO L226 Difference]: Without dead ends: 32761 [2022-01-10 00:16:43,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:43,241 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 343 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:43,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 435 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 00:16:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32761 states. [2022-01-10 00:16:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32761 to 17441. [2022-01-10 00:16:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17441 states, 17440 states have (on average 1.0420871559633027) internal successors, (18174), 17440 states have internal predecessors, (18174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17441 states to 17441 states and 18174 transitions. [2022-01-10 00:16:43,549 INFO L78 Accepts]: Start accepts. Automaton has 17441 states and 18174 transitions. Word has length 770 [2022-01-10 00:16:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:43,549 INFO L470 AbstractCegarLoop]: Abstraction has 17441 states and 18174 transitions. [2022-01-10 00:16:43,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17441 states and 18174 transitions. [2022-01-10 00:16:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-01-10 00:16:43,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:43,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:43,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 00:16:43,562 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1667368353, now seen corresponding path program 1 times [2022-01-10 00:16:43,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:43,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405097650] [2022-01-10 00:16:43,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:43,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 643 proven. 188 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-01-10 00:16:43,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405097650] [2022-01-10 00:16:43,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405097650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746048952] [2022-01-10 00:16:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:43,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:43,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:43,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:43,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 00:16:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 00:16:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 757 proven. 76 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-01-10 00:16:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:16:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-01-10 00:16:47,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746048952] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:47,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 00:16:47,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2022-01-10 00:16:47,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101654320] [2022-01-10 00:16:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:47,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:47,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 00:16:47,804 INFO L87 Difference]: Start difference. First operand 17441 states and 18174 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:48,693 INFO L93 Difference]: Finished difference Result 36678 states and 38197 transitions. [2022-01-10 00:16:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 785 [2022-01-10 00:16:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:48,714 INFO L225 Difference]: With dead ends: 36678 [2022-01-10 00:16:48,714 INFO L226 Difference]: Without dead ends: 19538 [2022-01-10 00:16:48,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 00:16:48,725 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 159 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:48,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 90 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19538 states. [2022-01-10 00:16:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19538 to 18936. [2022-01-10 00:16:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18936 states, 18935 states have (on average 1.0389754423026143) internal successors, (19673), 18935 states have internal predecessors, (19673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18936 states to 18936 states and 19673 transitions. [2022-01-10 00:16:48,898 INFO L78 Accepts]: Start accepts. Automaton has 18936 states and 19673 transitions. Word has length 785 [2022-01-10 00:16:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:48,898 INFO L470 AbstractCegarLoop]: Abstraction has 18936 states and 19673 transitions. [2022-01-10 00:16:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 18936 states and 19673 transitions. [2022-01-10 00:16:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-01-10 00:16:48,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:48,908 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:48,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 00:16:49,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-10 00:16:49,126 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:49,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 497531781, now seen corresponding path program 1 times [2022-01-10 00:16:49,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430378321] [2022-01-10 00:16:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:49,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-01-10 00:16:49,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430378321] [2022-01-10 00:16:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430378321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:49,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:49,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663767196] [2022-01-10 00:16:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:49,413 INFO L87 Difference]: Start difference. First operand 18936 states and 19673 transitions. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:50,707 INFO L93 Difference]: Finished difference Result 42979 states and 44743 transitions. [2022-01-10 00:16:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 797 [2022-01-10 00:16:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:50,729 INFO L225 Difference]: With dead ends: 42979 [2022-01-10 00:16:50,729 INFO L226 Difference]: Without dead ends: 24045 [2022-01-10 00:16:50,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:50,741 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 425 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:50,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 130 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 00:16:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24045 states. [2022-01-10 00:16:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24045 to 23129. [2022-01-10 00:16:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23129 states, 23128 states have (on average 1.0386544448287789) internal successors, (24022), 23128 states have internal predecessors, (24022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23129 states to 23129 states and 24022 transitions. [2022-01-10 00:16:50,967 INFO L78 Accepts]: Start accepts. Automaton has 23129 states and 24022 transitions. Word has length 797 [2022-01-10 00:16:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:50,967 INFO L470 AbstractCegarLoop]: Abstraction has 23129 states and 24022 transitions. [2022-01-10 00:16:50,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 23129 states and 24022 transitions. [2022-01-10 00:16:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 830 [2022-01-10 00:16:50,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:50,978 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:50,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 00:16:50,978 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1767804039, now seen corresponding path program 1 times [2022-01-10 00:16:50,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995596693] [2022-01-10 00:16:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:50,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-10 00:16:51,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995596693] [2022-01-10 00:16:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995596693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:51,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825322234] [2022-01-10 00:16:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:51,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:51,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:51,265 INFO L87 Difference]: Start difference. First operand 23129 states and 24022 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:52,376 INFO L93 Difference]: Finished difference Result 49253 states and 51163 transitions. [2022-01-10 00:16:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 829 [2022-01-10 00:16:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:52,401 INFO L225 Difference]: With dead ends: 49253 [2022-01-10 00:16:52,401 INFO L226 Difference]: Without dead ends: 26425 [2022-01-10 00:16:52,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:52,414 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 758 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:52,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 145 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:16:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26425 states. [2022-01-10 00:16:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26425 to 23129. [2022-01-10 00:16:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23129 states, 23128 states have (on average 1.0386544448287789) internal successors, (24022), 23128 states have internal predecessors, (24022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23129 states to 23129 states and 24022 transitions. [2022-01-10 00:16:52,620 INFO L78 Accepts]: Start accepts. Automaton has 23129 states and 24022 transitions. Word has length 829 [2022-01-10 00:16:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:52,620 INFO L470 AbstractCegarLoop]: Abstraction has 23129 states and 24022 transitions. [2022-01-10 00:16:52,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23129 states and 24022 transitions. [2022-01-10 00:16:52,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-01-10 00:16:52,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:52,637 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:52,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 00:16:52,637 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash 167783771, now seen corresponding path program 1 times [2022-01-10 00:16:52,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:52,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975977987] [2022-01-10 00:16:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:52,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1090 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2022-01-10 00:16:52,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975977987] [2022-01-10 00:16:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975977987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:52,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:52,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:52,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130354389] [2022-01-10 00:16:52,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:52,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:52,969 INFO L87 Difference]: Start difference. First operand 23129 states and 24022 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:54,029 INFO L93 Difference]: Finished difference Result 49553 states and 51474 transitions. [2022-01-10 00:16:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:54,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 956 [2022-01-10 00:16:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:54,053 INFO L225 Difference]: With dead ends: 49553 [2022-01-10 00:16:54,053 INFO L226 Difference]: Without dead ends: 26725 [2022-01-10 00:16:54,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:54,065 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 539 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:54,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 167 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26725 states. [2022-01-10 00:16:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26725 to 22830. [2022-01-10 00:16:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22830 states, 22829 states have (on average 1.0385912654956415) internal successors, (23710), 22829 states have internal predecessors, (23710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22830 states to 22830 states and 23710 transitions. [2022-01-10 00:16:54,270 INFO L78 Accepts]: Start accepts. Automaton has 22830 states and 23710 transitions. Word has length 956 [2022-01-10 00:16:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:54,271 INFO L470 AbstractCegarLoop]: Abstraction has 22830 states and 23710 transitions. [2022-01-10 00:16:54,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 22830 states and 23710 transitions. [2022-01-10 00:16:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-01-10 00:16:54,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:54,289 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:54,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-10 00:16:54,290 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash 666162767, now seen corresponding path program 1 times [2022-01-10 00:16:54,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743568374] [2022-01-10 00:16:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:54,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 916 proven. 0 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-01-10 00:16:54,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:54,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743568374] [2022-01-10 00:16:54,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743568374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:54,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:54,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:54,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009428550] [2022-01-10 00:16:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:54,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:54,662 INFO L87 Difference]: Start difference. First operand 22830 states and 23710 transitions. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:55,613 INFO L93 Difference]: Finished difference Result 47150 states and 48975 transitions. [2022-01-10 00:16:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 958 [2022-01-10 00:16:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:55,639 INFO L225 Difference]: With dead ends: 47150 [2022-01-10 00:16:55,639 INFO L226 Difference]: Without dead ends: 24621 [2022-01-10 00:16:55,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:55,653 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 312 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:55,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 511 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24621 states. [2022-01-10 00:16:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24621 to 21029. [2022-01-10 00:16:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 1.0380920677192316) internal successors, (21829), 21028 states have internal predecessors, (21829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 21829 transitions. [2022-01-10 00:16:55,925 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 21829 transitions. Word has length 958 [2022-01-10 00:16:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:55,926 INFO L470 AbstractCegarLoop]: Abstraction has 21029 states and 21829 transitions. [2022-01-10 00:16:55,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 21829 transitions. [2022-01-10 00:16:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2022-01-10 00:16:55,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:55,941 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-10 00:16:55,942 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2100020849, now seen corresponding path program 1 times [2022-01-10 00:16:55,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112754346] [2022-01-10 00:16:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:55,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 1053 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-01-10 00:16:56,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112754346] [2022-01-10 00:16:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112754346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:56,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:56,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:56,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287559124] [2022-01-10 00:16:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:56,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:56,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:56,328 INFO L87 Difference]: Start difference. First operand 21029 states and 21829 transitions. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:57,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:57,787 INFO L93 Difference]: Finished difference Result 48355 states and 50150 transitions. [2022-01-10 00:16:57,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:57,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 967 [2022-01-10 00:16:57,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:57,813 INFO L225 Difference]: With dead ends: 48355 [2022-01-10 00:16:57,813 INFO L226 Difference]: Without dead ends: 27627 [2022-01-10 00:16:57,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:57,826 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 492 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:57,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 130 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 00:16:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2022-01-10 00:16:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20730. [2022-01-10 00:16:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20730 states, 20729 states have (on average 1.0377731680254716) internal successors, (21512), 20729 states have internal predecessors, (21512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20730 states to 20730 states and 21512 transitions. [2022-01-10 00:16:58,028 INFO L78 Accepts]: Start accepts. Automaton has 20730 states and 21512 transitions. Word has length 967 [2022-01-10 00:16:58,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:58,029 INFO L470 AbstractCegarLoop]: Abstraction has 20730 states and 21512 transitions. [2022-01-10 00:16:58,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 20730 states and 21512 transitions. [2022-01-10 00:16:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2022-01-10 00:16:58,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:58,041 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:16:58,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-10 00:16:58,041 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -896374176, now seen corresponding path program 1 times [2022-01-10 00:16:58,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:58,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730686058] [2022-01-10 00:16:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:58,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 676 proven. 0 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2022-01-10 00:16:58,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730686058] [2022-01-10 00:16:58,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730686058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:58,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:58,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:58,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225615037] [2022-01-10 00:16:58,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:58,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:58,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:58,318 INFO L87 Difference]: Start difference. First operand 20730 states and 21512 transitions. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:16:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:59,210 INFO L93 Difference]: Finished difference Result 46554 states and 48370 transitions. [2022-01-10 00:16:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 968 [2022-01-10 00:16:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:59,234 INFO L225 Difference]: With dead ends: 46554 [2022-01-10 00:16:59,234 INFO L226 Difference]: Without dead ends: 26125 [2022-01-10 00:16:59,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:59,246 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:59,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 501 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]