/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:45:11,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:45:11,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:45:11,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:45:11,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 22:45:11,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 22:45:11,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 22:45:11,469 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:45:11,497 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:45:11,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:45:11,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:45:11,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:45:11,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:45:11,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:45:11,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:45:11,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:45:11,500 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:45:11,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:45:11,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:45:11,502 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:45:11,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:45:11,502 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:45:11,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:45:11,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:45:11,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:45:11,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:45:11,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:45:11,504 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:45:11,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:45:11,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:45:11,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:45:11,759 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:45:11,759 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:45:11,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2023-04-01 22:45:12,936 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:45:13,412 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:45:13,413 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c [2023-04-01 22:45:13,442 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7ca5ff78/dd2bcf4290f54e7a8ae46aa684b36a5a/FLAG738e82030 [2023-04-01 22:45:13,456 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7ca5ff78/dd2bcf4290f54e7a8ae46aa684b36a5a [2023-04-01 22:45:13,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:45:13,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:45:13,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:45:13,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:45:13,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:45:13,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:45:13" (1/1) ... [2023-04-01 22:45:13,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79aca5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:13, skipping insertion in model container [2023-04-01 22:45:13,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:45:13" (1/1) ... [2023-04-01 22:45:13,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:45:13,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:45:13,851 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2023-04-01 22:45:14,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:45:14,599 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:45:14,625 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label39.c[7279,7292] [2023-04-01 22:45:15,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:45:15,128 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:45:15,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15 WrapperNode [2023-04-01 22:45:15,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:45:15,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:45:15,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:45:15,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:45:15,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:45:15,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:45:15,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:45:15,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:45:15,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (1/1) ... [2023-04-01 22:45:15,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:45:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:15,562 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) [2023-04-01 22:45:15,568 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 [2023-04-01 22:45:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:45:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:45:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:45:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:45:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:45:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:45:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:45:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:45:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:45:15,668 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:45:15,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:45:20,594 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:45:20,613 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:45:20,613 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:45:20,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:45:20 BoogieIcfgContainer [2023-04-01 22:45:20,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:45:20,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:45:20,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:45:20,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:45:20,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:45:13" (1/3) ... [2023-04-01 22:45:20,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b4e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:45:20, skipping insertion in model container [2023-04-01 22:45:20,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:45:15" (2/3) ... [2023-04-01 22:45:20,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3b4e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:45:20, skipping insertion in model container [2023-04-01 22:45:20,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:45:20" (3/3) ... [2023-04-01 22:45:20,627 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label39.c [2023-04-01 22:45:20,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:45:20,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:45:20,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:45:20,731 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@541d7c73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:45:20,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:45:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:45:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 22:45:20,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:20,748 INFO L195 NwaCegarLoop]: 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] [2023-04-01 22:45:20,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:20,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 414579980, now seen corresponding path program 1 times [2023-04-01 22:45:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:20,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349105884] [2023-04-01 22:45:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:21,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:21,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:21,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349105884] [2023-04-01 22:45:21,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349105884] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:21,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:45:21,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:45:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609203813] [2023-04-01 22:45:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:45:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:45:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:45:21,439 INFO L87 Difference]: Start difference. First operand has 1119 states, 1105 states have (on average 1.820814479638009) internal successors, (2012), 1106 states have internal predecessors, (2012), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:45:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:27,676 INFO L93 Difference]: Finished difference Result 3230 states and 5909 transitions. [2023-04-01 22:45:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:45:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-04-01 22:45:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:27,704 INFO L225 Difference]: With dead ends: 3230 [2023-04-01 22:45:27,704 INFO L226 Difference]: Without dead ends: 2026 [2023-04-01 22:45:27,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:45:27,716 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 3008 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3008 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:27,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3008 Valid, 300 Invalid, 5089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 22:45:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2023-04-01 22:45:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2009. [2023-04-01 22:45:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1981 states have (on average 1.6436143361938416) internal successors, (3256), 1983 states have internal predecessors, (3256), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (25), 15 states have call predecessors, (25), 9 states have call successors, (25) [2023-04-01 22:45:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3291 transitions. [2023-04-01 22:45:27,843 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3291 transitions. Word has length 57 [2023-04-01 22:45:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:27,844 INFO L495 AbstractCegarLoop]: Abstraction has 2009 states and 3291 transitions. [2023-04-01 22:45:27,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:45:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3291 transitions. [2023-04-01 22:45:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 22:45:27,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:27,849 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:45:27,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:27,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -621388071, now seen corresponding path program 1 times [2023-04-01 22:45:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038757833] [2023-04-01 22:45:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:28,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038757833] [2023-04-01 22:45:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038757833] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:28,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:45:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:45:28,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104815888] [2023-04-01 22:45:28,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:28,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:45:28,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:45:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:45:28,433 INFO L87 Difference]: Start difference. First operand 2009 states and 3291 transitions. Second operand has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:35,978 INFO L93 Difference]: Finished difference Result 5863 states and 9700 transitions. [2023-04-01 22:45:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:45:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2023-04-01 22:45:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:36,009 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 22:45:36,010 INFO L226 Difference]: Without dead ends: 3860 [2023-04-01 22:45:36,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:45:36,026 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3296 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 7739 mSolverCounterSat, 1185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 8924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1185 IncrementalHoareTripleChecker+Valid, 7739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:36,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3296 Valid, 815 Invalid, 8924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1185 Valid, 7739 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 22:45:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2023-04-01 22:45:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3760. [2023-04-01 22:45:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3760 states, 3688 states have (on average 1.4899674620390455) internal successors, (5495), 3700 states have internal predecessors, (5495), 18 states have call successors, (18), 18 states have call predecessors, (18), 53 states have return successors, (117), 41 states have call predecessors, (117), 17 states have call successors, (117) [2023-04-01 22:45:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3760 states to 3760 states and 5630 transitions. [2023-04-01 22:45:36,160 INFO L78 Accepts]: Start accepts. Automaton has 3760 states and 5630 transitions. Word has length 132 [2023-04-01 22:45:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:36,161 INFO L495 AbstractCegarLoop]: Abstraction has 3760 states and 5630 transitions. [2023-04-01 22:45:36,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.0) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3760 states and 5630 transitions. [2023-04-01 22:45:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 22:45:36,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:36,167 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:36,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:45:36,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:36,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 456120373, now seen corresponding path program 1 times [2023-04-01 22:45:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:36,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280005888] [2023-04-01 22:45:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:36,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:36,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:36,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280005888] [2023-04-01 22:45:36,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280005888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:36,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:45:36,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:45:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229376502] [2023-04-01 22:45:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:45:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:45:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:45:36,583 INFO L87 Difference]: Start difference. First operand 3760 states and 5630 transitions. Second operand has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:45,057 INFO L93 Difference]: Finished difference Result 14591 states and 22901 transitions. [2023-04-01 22:45:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:45:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 146 [2023-04-01 22:45:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:45,104 INFO L225 Difference]: With dead ends: 14591 [2023-04-01 22:45:45,105 INFO L226 Difference]: Without dead ends: 10837 [2023-04-01 22:45:45,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:45:45,121 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 4931 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 8284 mSolverCounterSat, 1969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4931 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1969 IncrementalHoareTripleChecker+Valid, 8284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:45,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4931 Valid, 813 Invalid, 10253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1969 Valid, 8284 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2023-04-01 22:45:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10837 states. [2023-04-01 22:45:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10837 to 10751. [2023-04-01 22:45:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10751 states, 10420 states have (on average 1.3435700575815739) internal successors, (14000), 10488 states have internal predecessors, (14000), 50 states have call successors, (50), 50 states have call predecessors, (50), 280 states have return successors, (1257), 212 states have call predecessors, (1257), 49 states have call successors, (1257) [2023-04-01 22:45:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 15307 transitions. [2023-04-01 22:45:45,391 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 15307 transitions. Word has length 146 [2023-04-01 22:45:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:45,393 INFO L495 AbstractCegarLoop]: Abstraction has 10751 states and 15307 transitions. [2023-04-01 22:45:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.0) internal successors, (140), 5 states have internal predecessors, (140), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 15307 transitions. [2023-04-01 22:45:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-04-01 22:45:45,396 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:45,397 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:45,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:45:45,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:45,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1924062760, now seen corresponding path program 1 times [2023-04-01 22:45:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:45,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112037115] [2023-04-01 22:45:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:45,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:45,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:45,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112037115] [2023-04-01 22:45:45,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112037115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:45:45,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:45:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:45:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140946698] [2023-04-01 22:45:45,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:45,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:45:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:45,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:45:45,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:45:45,799 INFO L87 Difference]: Start difference. First operand 10751 states and 15307 transitions. Second operand has 8 states, 7 states have (on average 24.142857142857142) internal successors, (169), 5 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:53,591 INFO L93 Difference]: Finished difference Result 39561 states and 60683 transitions. [2023-04-01 22:45:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:45:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 24.142857142857142) internal successors, (169), 5 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 175 [2023-04-01 22:45:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:53,718 INFO L225 Difference]: With dead ends: 39561 [2023-04-01 22:45:53,718 INFO L226 Difference]: Without dead ends: 28816 [2023-04-01 22:45:53,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:45:53,763 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 5236 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 7481 mSolverCounterSat, 2178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5236 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 9659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2178 IncrementalHoareTripleChecker+Valid, 7481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:53,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5236 Valid, 569 Invalid, 9659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2178 Valid, 7481 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 22:45:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2023-04-01 22:45:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 28710. [2023-04-01 22:45:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28710 states, 27783 states have (on average 1.2118561710398446) internal successors, (33669), 28013 states have internal predecessors, (33669), 134 states have call successors, (134), 134 states have call predecessors, (134), 792 states have return successors, (5011), 562 states have call predecessors, (5011), 133 states have call successors, (5011) [2023-04-01 22:45:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28710 states to 28710 states and 38814 transitions. [2023-04-01 22:45:54,559 INFO L78 Accepts]: Start accepts. Automaton has 28710 states and 38814 transitions. Word has length 175 [2023-04-01 22:45:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:45:54,560 INFO L495 AbstractCegarLoop]: Abstraction has 28710 states and 38814 transitions. [2023-04-01 22:45:54,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 24.142857142857142) internal successors, (169), 5 states have internal predecessors, (169), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:45:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28710 states and 38814 transitions. [2023-04-01 22:45:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-04-01 22:45:54,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:45:54,564 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:45:54,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 22:45:54,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:45:54,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:45:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash 537053196, now seen corresponding path program 1 times [2023-04-01 22:45:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:45:54,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538137840] [2023-04-01 22:45:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:54,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:45:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:54,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:45:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:54,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:45:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:45:55,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538137840] [2023-04-01 22:45:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538137840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:55,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481242829] [2023-04-01 22:45:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:45:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:45:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:45:55,237 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) [2023-04-01 22:45:55,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:45:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:45:55,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 22:45:55,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:45:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:55,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:45:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:45:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481242829] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:45:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:45:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2023-04-01 22:45:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626380946] [2023-04-01 22:45:55,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:45:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:45:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:45:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:45:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:45:55,879 INFO L87 Difference]: Start difference. First operand 28710 states and 38814 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:45:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:45:59,583 INFO L93 Difference]: Finished difference Result 66404 states and 89696 transitions. [2023-04-01 22:45:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:45:59,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 186 [2023-04-01 22:45:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:45:59,713 INFO L225 Difference]: With dead ends: 66404 [2023-04-01 22:45:59,713 INFO L226 Difference]: Without dead ends: 37700 [2023-04-01 22:45:59,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 371 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:45:59,782 INFO L413 NwaCegarLoop]: 1798 mSDtfsCounter, 873 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:45:59,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1952 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 22:45:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37700 states. [2023-04-01 22:46:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37700 to 33600. [2023-04-01 22:46:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33600 states, 32592 states have (on average 1.1940967108492881) internal successors, (38918), 32842 states have internal predecessors, (38918), 158 states have call successors, (158), 158 states have call predecessors, (158), 849 states have return successors, (5448), 599 states have call predecessors, (5448), 157 states have call successors, (5448) [2023-04-01 22:46:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33600 states to 33600 states and 44524 transitions. [2023-04-01 22:46:00,636 INFO L78 Accepts]: Start accepts. Automaton has 33600 states and 44524 transitions. Word has length 186 [2023-04-01 22:46:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:00,636 INFO L495 AbstractCegarLoop]: Abstraction has 33600 states and 44524 transitions. [2023-04-01 22:46:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:46:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 33600 states and 44524 transitions. [2023-04-01 22:46:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-04-01 22:46:00,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:00,641 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:46:00,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:46:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:00,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:00,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1649753912, now seen corresponding path program 1 times [2023-04-01 22:46:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020765076] [2023-04-01 22:46:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:01,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:01,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:46:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:46:01,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020765076] [2023-04-01 22:46:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020765076] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:01,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467312847] [2023-04-01 22:46:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:01,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:01,185 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) [2023-04-01 22:46:01,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:46:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:01,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:46:01,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:46:01,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:46:01,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467312847] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:46:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:46:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544124285] [2023-04-01 22:46:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:01,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:46:01,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:01,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:46:01,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:46:01,388 INFO L87 Difference]: Start difference. First operand 33600 states and 44524 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:05,187 INFO L93 Difference]: Finished difference Result 75614 states and 102418 transitions. [2023-04-01 22:46:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:46:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 257 [2023-04-01 22:46:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:05,334 INFO L225 Difference]: With dead ends: 75614 [2023-04-01 22:46:05,334 INFO L226 Difference]: Without dead ends: 42823 [2023-04-01 22:46:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:46:05,387 INFO L413 NwaCegarLoop]: 1894 mSDtfsCounter, 809 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:05,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2066 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 22:46:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42823 states. [2023-04-01 22:46:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42823 to 41993. [2023-04-01 22:46:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41993 states, 40767 states have (on average 1.1707017931169819) internal successors, (47726), 41070 states have internal predecessors, (47726), 198 states have call successors, (198), 198 states have call predecessors, (198), 1027 states have return successors, (7117), 724 states have call predecessors, (7117), 197 states have call successors, (7117) [2023-04-01 22:46:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41993 states to 41993 states and 55041 transitions. [2023-04-01 22:46:06,364 INFO L78 Accepts]: Start accepts. Automaton has 41993 states and 55041 transitions. Word has length 257 [2023-04-01 22:46:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:06,365 INFO L495 AbstractCegarLoop]: Abstraction has 41993 states and 55041 transitions. [2023-04-01 22:46:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 41993 states and 55041 transitions. [2023-04-01 22:46:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-04-01 22:46:06,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:06,377 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:46:06,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 22:46:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 22:46:06,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:06,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1060471282, now seen corresponding path program 1 times [2023-04-01 22:46:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343661811] [2023-04-01 22:46:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:06,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:07,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:46:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 142 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:46:07,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:07,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343661811] [2023-04-01 22:46:07,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343661811] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:07,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785846978] [2023-04-01 22:46:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:07,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:07,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:07,244 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) [2023-04-01 22:46:07,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:46:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:07,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 22:46:07,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-04-01 22:46:07,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:46:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 104 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:46:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785846978] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:46:08,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:46:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2023-04-01 22:46:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602493814] [2023-04-01 22:46:08,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:46:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 22:46:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 22:46:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-04-01 22:46:08,522 INFO L87 Difference]: Start difference. First operand 41993 states and 55041 transitions. Second operand has 18 states, 18 states have (on average 31.38888888888889) internal successors, (565), 16 states have internal predecessors, (565), 8 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:46:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:32,086 INFO L93 Difference]: Finished difference Result 209010 states and 332254 transitions. [2023-04-01 22:46:32,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 22:46:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 31.38888888888889) internal successors, (565), 16 states have internal predecessors, (565), 8 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 262 [2023-04-01 22:46:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:32,940 INFO L225 Difference]: With dead ends: 209010 [2023-04-01 22:46:32,941 INFO L226 Difference]: Without dead ends: 167826 [2023-04-01 22:46:33,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=931, Invalid=2851, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 22:46:33,059 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 16454 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 23732 mSolverCounterSat, 5546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16461 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 29278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5546 IncrementalHoareTripleChecker+Valid, 23732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:33,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16461 Valid, 1582 Invalid, 29278 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5546 Valid, 23732 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2023-04-01 22:46:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167826 states. [2023-04-01 22:46:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167826 to 155436. [2023-04-01 22:46:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155436 states, 151791 states have (on average 1.1593704501584416) internal successors, (175982), 152723 states have internal predecessors, (175982), 746 states have call successors, (746), 746 states have call predecessors, (746), 2898 states have return successors, (44464), 1966 states have call predecessors, (44464), 745 states have call successors, (44464) [2023-04-01 22:46:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155436 states to 155436 states and 221192 transitions. [2023-04-01 22:46:37,793 INFO L78 Accepts]: Start accepts. Automaton has 155436 states and 221192 transitions. Word has length 262 [2023-04-01 22:46:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:37,793 INFO L495 AbstractCegarLoop]: Abstraction has 155436 states and 221192 transitions. [2023-04-01 22:46:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 31.38888888888889) internal successors, (565), 16 states have internal predecessors, (565), 8 states have call successors, (12), 10 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 22:46:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 155436 states and 221192 transitions. [2023-04-01 22:46:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2023-04-01 22:46:37,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:37,801 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:46:37,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:46:38,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:38,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:38,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash -223776884, now seen corresponding path program 1 times [2023-04-01 22:46:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:38,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513363295] [2023-04-01 22:46:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:38,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:38,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:46:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 22:46:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:38,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513363295] [2023-04-01 22:46:38,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513363295] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:38,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989436036] [2023-04-01 22:46:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:38,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:38,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:38,775 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) [2023-04-01 22:46:38,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:46:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:38,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:46:38,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-01 22:46:39,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:46:39,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989436036] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:39,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:46:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-04-01 22:46:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007431639] [2023-04-01 22:46:39,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:39,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:46:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:46:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:46:39,041 INFO L87 Difference]: Start difference. First operand 155436 states and 221192 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:43,617 INFO L93 Difference]: Finished difference Result 310065 states and 441644 transitions. [2023-04-01 22:46:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:46:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 285 [2023-04-01 22:46:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:44,339 INFO L225 Difference]: With dead ends: 310065 [2023-04-01 22:46:44,339 INFO L226 Difference]: Without dead ends: 155438 [2023-04-01 22:46:44,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:46:44,473 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1165 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:44,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 1481 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 22:46:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155438 states. [2023-04-01 22:46:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155438 to 153830. [2023-04-01 22:46:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153830 states, 150201 states have (on average 1.1206716333446516) internal successors, (168326), 151133 states have internal predecessors, (168326), 738 states have call successors, (738), 738 states have call predecessors, (738), 2890 states have return successors, (33490), 1958 states have call predecessors, (33490), 737 states have call successors, (33490) [2023-04-01 22:46:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153830 states to 153830 states and 202554 transitions. [2023-04-01 22:46:47,633 INFO L78 Accepts]: Start accepts. Automaton has 153830 states and 202554 transitions. Word has length 285 [2023-04-01 22:46:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:47,634 INFO L495 AbstractCegarLoop]: Abstraction has 153830 states and 202554 transitions. [2023-04-01 22:46:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 153830 states and 202554 transitions. [2023-04-01 22:46:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-04-01 22:46:47,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:47,643 INFO L195 NwaCegarLoop]: 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, 3, 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] [2023-04-01 22:46:47,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:46:47,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:47,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:47,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1918914585, now seen corresponding path program 1 times [2023-04-01 22:46:47,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:47,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659394740] [2023-04-01 22:46:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:46:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:46:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 153 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:46:48,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:48,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659394740] [2023-04-01 22:46:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659394740] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709210922] [2023-04-01 22:46:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:48,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:48,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:48,370 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) [2023-04-01 22:46:48,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:46:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:48,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:46:48,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:46:48,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:46:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709210922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:48,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:46:48,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:46:48,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097780871] [2023-04-01 22:46:48,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:46:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:46:48,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:46:48,569 INFO L87 Difference]: Start difference. First operand 153830 states and 202554 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:46:52,918 INFO L93 Difference]: Finished difference Result 308511 states and 406933 transitions. [2023-04-01 22:46:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:46:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 302 [2023-04-01 22:46:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:46:53,568 INFO L225 Difference]: With dead ends: 308511 [2023-04-01 22:46:53,568 INFO L226 Difference]: Without dead ends: 155490 [2023-04-01 22:46:53,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:46:53,693 INFO L413 NwaCegarLoop]: 1275 mSDtfsCounter, 1074 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:46:53,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 1347 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:46:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155490 states. [2023-04-01 22:46:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155490 to 153817. [2023-04-01 22:46:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153817 states, 150190 states have (on average 1.1096211465477062) internal successors, (166654), 151120 states have internal predecessors, (166654), 738 states have call successors, (738), 738 states have call predecessors, (738), 2888 states have return successors, (30460), 1958 states have call predecessors, (30460), 737 states have call successors, (30460) [2023-04-01 22:46:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153817 states to 153817 states and 197852 transitions. [2023-04-01 22:46:56,595 INFO L78 Accepts]: Start accepts. Automaton has 153817 states and 197852 transitions. Word has length 302 [2023-04-01 22:46:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:46:56,595 INFO L495 AbstractCegarLoop]: Abstraction has 153817 states and 197852 transitions. [2023-04-01 22:46:56,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:46:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 153817 states and 197852 transitions. [2023-04-01 22:46:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-04-01 22:46:56,609 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:46:56,609 INFO L195 NwaCegarLoop]: 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:46:56,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:46:56,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:56,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:46:56,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:46:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -25975820, now seen corresponding path program 1 times [2023-04-01 22:46:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:46:56,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19718386] [2023-04-01 22:46:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:46:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:46:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:57,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:46:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:57,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2023-04-01 22:46:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2023-04-01 22:46:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 155 proven. 221 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:46:58,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:46:58,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19718386] [2023-04-01 22:46:58,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19718386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:46:58,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397051919] [2023-04-01 22:46:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:46:58,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:46:58,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:46:58,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:46:58,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:46:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:46:58,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:46:58,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:46:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 22:46:58,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:46:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397051919] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:46:58,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:46:58,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-04-01 22:46:58,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996465901] [2023-04-01 22:46:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:46:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:46:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:46:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:46:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:46:58,393 INFO L87 Difference]: Start difference. First operand 153817 states and 197852 transitions. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:04,520 INFO L93 Difference]: Finished difference Result 333047 states and 428764 transitions. [2023-04-01 22:47:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:47:04,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 338 [2023-04-01 22:47:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:05,223 INFO L225 Difference]: With dead ends: 333047 [2023-04-01 22:47:05,224 INFO L226 Difference]: Without dead ends: 180057 [2023-04-01 22:47:05,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:47:05,346 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 2859 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 5311 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2859 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 6088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 5311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:05,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2859 Valid, 627 Invalid, 6088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 5311 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 22:47:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180057 states. [2023-04-01 22:47:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180057 to 173567. [2023-04-01 22:47:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173567 states, 169565 states have (on average 1.1023206440008257) internal successors, (186915), 170586 states have internal predecessors, (186915), 834 states have call successors, (834), 834 states have call predecessors, (834), 3167 states have return successors, (33098), 2146 states have call predecessors, (33098), 833 states have call successors, (33098) [2023-04-01 22:47:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173567 states to 173567 states and 220847 transitions. [2023-04-01 22:47:08,457 INFO L78 Accepts]: Start accepts. Automaton has 173567 states and 220847 transitions. Word has length 338 [2023-04-01 22:47:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:08,458 INFO L495 AbstractCegarLoop]: Abstraction has 173567 states and 220847 transitions. [2023-04-01 22:47:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 4 states have internal predecessors, (210), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:47:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 173567 states and 220847 transitions. [2023-04-01 22:47:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-04-01 22:47:08,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:08,474 INFO L195 NwaCegarLoop]: 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, 4, 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, 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] [2023-04-01 22:47:08,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:08,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:08,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash 907046376, now seen corresponding path program 1 times [2023-04-01 22:47:08,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:08,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137809661] [2023-04-01 22:47:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:08,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:47:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:47:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2023-04-01 22:47:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 446 proven. 2 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-04-01 22:47:09,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137809661] [2023-04-01 22:47:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137809661] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354885600] [2023-04-01 22:47:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:09,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:09,520 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:09,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:47:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:09,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:47:09,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 449 proven. 2 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:47:09,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 449 proven. 2 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-04-01 22:47:10,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354885600] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:10,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:10,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-04-01 22:47:10,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394576936] [2023-04-01 22:47:10,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:10,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:47:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:10,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:47:10,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:47:10,152 INFO L87 Difference]: Start difference. First operand 173567 states and 220847 transitions. Second operand has 8 states, 8 states have (on average 44.125) internal successors, (353), 6 states have internal predecessors, (353), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 22:47:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:19,567 INFO L93 Difference]: Finished difference Result 375647 states and 477231 transitions. [2023-04-01 22:47:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:47:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 44.125) internal successors, (353), 6 states have internal predecessors, (353), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 407 [2023-04-01 22:47:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:20,176 INFO L225 Difference]: With dead ends: 375647 [2023-04-01 22:47:20,176 INFO L226 Difference]: Without dead ends: 203705 [2023-04-01 22:47:20,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 827 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:47:20,474 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 4010 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 9523 mSolverCounterSat, 1172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4015 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 10695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1172 IncrementalHoareTripleChecker+Valid, 9523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:20,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4015 Valid, 540 Invalid, 10695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1172 Valid, 9523 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-04-01 22:47:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203705 states. [2023-04-01 22:47:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203705 to 197219. [2023-04-01 22:47:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197219 states, 193374 states have (on average 1.077575061797346) internal successors, (208375), 194245 states have internal predecessors, (208375), 958 states have call successors, (958), 958 states have call predecessors, (958), 2886 states have return successors, (29043), 2015 states have call predecessors, (29043), 957 states have call successors, (29043) [2023-04-01 22:47:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197219 states to 197219 states and 238376 transitions. [2023-04-01 22:47:24,591 INFO L78 Accepts]: Start accepts. Automaton has 197219 states and 238376 transitions. Word has length 407 [2023-04-01 22:47:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:24,592 INFO L495 AbstractCegarLoop]: Abstraction has 197219 states and 238376 transitions. [2023-04-01 22:47:24,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 44.125) internal successors, (353), 6 states have internal predecessors, (353), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 22:47:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 197219 states and 238376 transitions. [2023-04-01 22:47:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-04-01 22:47:24,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:24,611 INFO L195 NwaCegarLoop]: 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, 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, 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] [2023-04-01 22:47:24,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:24,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:24,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:24,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:24,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1420693529, now seen corresponding path program 1 times [2023-04-01 22:47:24,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:24,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090510524] [2023-04-01 22:47:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:24,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:25,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:25,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:47:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 22:47:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:26,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2023-04-01 22:47:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 298 proven. 144 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2023-04-01 22:47:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090510524] [2023-04-01 22:47:26,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090510524] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:26,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737720067] [2023-04-01 22:47:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:26,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:26,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:26,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:47:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:26,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 22:47:26,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 518 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-01 22:47:26,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 361 proven. 72 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-04-01 22:47:26,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737720067] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:26,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:26,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-04-01 22:47:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251959380] [2023-04-01 22:47:26,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:26,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 22:47:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 22:47:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:47:26,939 INFO L87 Difference]: Start difference. First operand 197219 states and 238376 transitions. Second operand has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:47:43,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:47:43,068 INFO L93 Difference]: Finished difference Result 496001 states and 609914 transitions. [2023-04-01 22:47:43,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 22:47:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 433 [2023-04-01 22:47:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:47:44,004 INFO L225 Difference]: With dead ends: 496001 [2023-04-01 22:47:44,004 INFO L226 Difference]: Without dead ends: 302018 [2023-04-01 22:47:44,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 889 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 22:47:44,288 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 9330 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 14277 mSolverCounterSat, 2959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9330 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 17236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2959 IncrementalHoareTripleChecker+Valid, 14277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:47:44,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9330 Valid, 1047 Invalid, 17236 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2959 Valid, 14277 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2023-04-01 22:47:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302018 states. [2023-04-01 22:47:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302018 to 292907. [2023-04-01 22:47:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292907 states, 287764 states have (on average 1.0766148649587857) internal successors, (309811), 288805 states have internal predecessors, (309811), 1430 states have call successors, (1430), 1430 states have call predecessors, (1430), 3712 states have return successors, (44448), 2671 states have call predecessors, (44448), 1429 states have call successors, (44448) [2023-04-01 22:47:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292907 states to 292907 states and 355689 transitions. [2023-04-01 22:47:50,055 INFO L78 Accepts]: Start accepts. Automaton has 292907 states and 355689 transitions. Word has length 433 [2023-04-01 22:47:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:47:50,056 INFO L495 AbstractCegarLoop]: Abstraction has 292907 states and 355689 transitions. [2023-04-01 22:47:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.38461538461539) internal successors, (499), 11 states have internal predecessors, (499), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 22:47:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 292907 states and 355689 transitions. [2023-04-01 22:47:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-04-01 22:47:50,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:47:50,070 INFO L195 NwaCegarLoop]: 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, 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, 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] [2023-04-01 22:47:50,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:47:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 22:47:50,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:47:50,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:47:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1173734357, now seen corresponding path program 1 times [2023-04-01 22:47:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:47:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207215924] [2023-04-01 22:47:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:47:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:47:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:47:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:50,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:47:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:47:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2023-04-01 22:47:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 372 proven. 75 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-01 22:47:51,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:47:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207215924] [2023-04-01 22:47:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207215924] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:47:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203224966] [2023-04-01 22:47:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:47:51,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:47:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:47:51,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:47:51,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:47:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:47:51,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:47:51,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:47:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 536 proven. 2 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-04-01 22:47:51,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:47:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 379 proven. 72 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-04-01 22:47:51,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203224966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:47:51,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:47:51,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:47:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998235879] [2023-04-01 22:47:51,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:47:51,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:47:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:47:51,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:47:51,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:47:51,852 INFO L87 Difference]: Start difference. First operand 292907 states and 355689 transitions. Second operand has 12 states, 12 states have (on average 49.583333333333336) internal successors, (595), 10 states have internal predecessors, (595), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:48:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:04,816 INFO L93 Difference]: Finished difference Result 631248 states and 771543 transitions. [2023-04-01 22:48:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 22:48:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 49.583333333333336) internal successors, (595), 10 states have internal predecessors, (595), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 441 [2023-04-01 22:48:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:05,864 INFO L225 Difference]: With dead ends: 631248 [2023-04-01 22:48:05,864 INFO L226 Difference]: Without dead ends: 339830 [2023-04-01 22:48:06,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 901 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:48:06,245 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 9724 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 10735 mSolverCounterSat, 2203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9724 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 12938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2203 IncrementalHoareTripleChecker+Valid, 10735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:06,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9724 Valid, 930 Invalid, 12938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2203 Valid, 10735 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-04-01 22:48:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339830 states. [2023-04-01 22:48:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339830 to 330907. [2023-04-01 22:48:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330907 states, 325287 states have (on average 1.0551881876619724) internal successors, (343239), 326374 states have internal predecessors, (343239), 1618 states have call successors, (1618), 1618 states have call predecessors, (1618), 4001 states have return successors, (38235), 2914 states have call predecessors, (38235), 1617 states have call successors, (38235) [2023-04-01 22:48:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330907 states to 330907 states and 383092 transitions. [2023-04-01 22:48:12,224 INFO L78 Accepts]: Start accepts. Automaton has 330907 states and 383092 transitions. Word has length 441 [2023-04-01 22:48:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:12,224 INFO L495 AbstractCegarLoop]: Abstraction has 330907 states and 383092 transitions. [2023-04-01 22:48:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.583333333333336) internal successors, (595), 10 states have internal predecessors, (595), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:48:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 330907 states and 383092 transitions. [2023-04-01 22:48:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-04-01 22:48:12,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:12,236 INFO L195 NwaCegarLoop]: 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, 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, 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] [2023-04-01 22:48:12,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 22:48:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 22:48:12,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:12,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash 638795818, now seen corresponding path program 1 times [2023-04-01 22:48:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:12,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187549226] [2023-04-01 22:48:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:13,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:13,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:13,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-04-01 22:48:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:13,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2023-04-01 22:48:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:13,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2023-04-01 22:48:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2023-04-01 22:48:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 581 proven. 142 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-04-01 22:48:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187549226] [2023-04-01 22:48:14,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187549226] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:14,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117973596] [2023-04-01 22:48:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:14,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:14,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:14,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 22:48:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:14,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:48:14,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 363 proven. 0 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2023-04-01 22:48:14,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:48:14,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117973596] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:48:14,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:48:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 22:48:14,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748884330] [2023-04-01 22:48:14,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:48:14,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:48:14,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:48:14,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:48:14,845 INFO L87 Difference]: Start difference. First operand 330907 states and 383092 transitions. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:48:23,311 INFO L93 Difference]: Finished difference Result 667666 states and 773121 transitions. [2023-04-01 22:48:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 22:48:23,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 469 [2023-04-01 22:48:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:48:24,377 INFO L225 Difference]: With dead ends: 667666 [2023-04-01 22:48:24,377 INFO L226 Difference]: Without dead ends: 342404 [2023-04-01 22:48:24,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:48:24,740 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 2621 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 5070 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2621 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 5920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 5070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:48:24,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2621 Valid, 544 Invalid, 5920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 5070 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 22:48:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342404 states. [2023-04-01 22:48:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342404 to 339895. [2023-04-01 22:48:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339895 states, 334129 states have (on average 1.0543113587865764) internal successors, (352276), 335242 states have internal predecessors, (352276), 1662 states have call successors, (1662), 1662 states have call predecessors, (1662), 4103 states have return successors, (38852), 2990 states have call predecessors, (38852), 1661 states have call successors, (38852) [2023-04-01 22:48:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339895 states to 339895 states and 392790 transitions. [2023-04-01 22:48:31,082 INFO L78 Accepts]: Start accepts. Automaton has 339895 states and 392790 transitions. Word has length 469 [2023-04-01 22:48:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:48:31,083 INFO L495 AbstractCegarLoop]: Abstraction has 339895 states and 392790 transitions. [2023-04-01 22:48:31,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 4 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:48:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 339895 states and 392790 transitions. [2023-04-01 22:48:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-04-01 22:48:31,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:48:31,094 INFO L195 NwaCegarLoop]: 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, 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, 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] [2023-04-01 22:48:31,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 22:48:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 22:48:31,295 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:48:31,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:48:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash -830031918, now seen corresponding path program 1 times [2023-04-01 22:48:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:48:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66687003] [2023-04-01 22:48:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:48:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:48:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:48:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-04-01 22:48:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2023-04-01 22:48:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 349 [2023-04-01 22:48:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 305 proven. 163 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-04-01 22:48:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:48:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66687003] [2023-04-01 22:48:31,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66687003] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:48:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453038850] [2023-04-01 22:48:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:48:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:48:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:48:31,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:48:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 22:48:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:48:32,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:48:32,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:48:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 530 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-04-01 22:48:32,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:48:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 306 proven. 165 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-01 22:48:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453038850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:48:32,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:48:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:48:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26377032] [2023-04-01 22:48:32,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:48:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:48:32,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:48:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:48:32,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:48:32,715 INFO L87 Difference]: Start difference. First operand 339895 states and 392790 transitions. Second operand has 11 states, 11 states have (on average 57.36363636363637) internal successors, (631), 9 states have internal predecessors, (631), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)