/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/Problem14_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:28:08,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:28:08,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:28:08,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:28:08,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:28:08,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:28:08,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:28:08,493 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 [2023-03-30 23:28:08,521 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:28:08,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:28:08,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:28:08,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:28:08,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:28:08,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:28:08,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:28:08,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:28:08,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:28:08,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:28:08,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:28:08,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:28:08,525 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:28:08,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:28:08,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:28:08,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:28:08,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:28:08,756 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:28:08,757 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:28:08,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label19.c [2023-03-30 23:28:09,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:28:10,039 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:28:10,039 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label19.c [2023-03-30 23:28:10,062 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2803772a6/58d44e936d3e41aea8971f002bd23fef/FLAGfc230c9b5 [2023-03-30 23:28:10,073 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2803772a6/58d44e936d3e41aea8971f002bd23fef [2023-03-30 23:28:10,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:28:10,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:28:10,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:28:10,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:28:10,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:28:10,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed24497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10, skipping insertion in model container [2023-03-30 23:28:10,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:28:10,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:28:10,253 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/Problem14_label19.c[6323,6336] [2023-03-30 23:28:10,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:28:10,389 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:28:10,407 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/Problem14_label19.c[6323,6336] [2023-03-30 23:28:10,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:28:10,563 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:28:10,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10 WrapperNode [2023-03-30 23:28:10,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:28:10,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:28:10,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:28:10,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:28:10,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:28:10,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:28:10,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:28:10,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:28:10,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (1/1) ... [2023-03-30 23:28:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:28:10,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:10,690 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) [2023-03-30 23:28:10,700 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 [2023-03-30 23:28:10,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:28:10,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:28:10,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:28:10,758 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:28:10,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:28:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:28:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:28:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:28:10,808 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:28:10,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:28:11,542 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:28:11,551 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:28:11,552 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:28:11,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:28:11 BoogieIcfgContainer [2023-03-30 23:28:11,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:28:11,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:28:11,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:28:11,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:28:11,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:28:10" (1/3) ... [2023-03-30 23:28:11,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f61d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:28:11, skipping insertion in model container [2023-03-30 23:28:11,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:28:10" (2/3) ... [2023-03-30 23:28:11,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f61d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:28:11, skipping insertion in model container [2023-03-30 23:28:11,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:28:11" (3/3) ... [2023-03-30 23:28:11,579 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label19.c [2023-03-30 23:28:11,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:28:11,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:28:11,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:28:11,655 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;@4dde9138, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:28:11,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:28:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:28:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-30 23:28:11,669 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:11,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:28:11,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:11,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 974352129, now seen corresponding path program 1 times [2023-03-30 23:28:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:11,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953348599] [2023-03-30 23:28:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:12,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:28:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953348599] [2023-03-30 23:28:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953348599] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:12,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:28:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:28:12,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868263812] [2023-03-30 23:28:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:28:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:28:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:28:12,148 INFO L87 Difference]: Start difference. First operand has 254 states, 246 states have (on average 1.7276422764227641) internal successors, (425), 247 states have internal predecessors, (425), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-03-30 23:28:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:13,686 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2023-03-30 23:28:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:28:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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 68 [2023-03-30 23:28:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:13,719 INFO L225 Difference]: With dead ends: 886 [2023-03-30 23:28:13,719 INFO L226 Difference]: Without dead ends: 564 [2023-03-30 23:28:13,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:28:13,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1193 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:13,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 31 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:28:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-03-30 23:28:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2023-03-30 23:28:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 546 states have (on average 1.6282051282051282) internal successors, (889), 548 states have internal predecessors, (889), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-03-30 23:28:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2023-03-30 23:28:13,787 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 68 [2023-03-30 23:28:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:13,788 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2023-03-30 23:28:13,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-03-30 23:28:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2023-03-30 23:28:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-03-30 23:28:13,797 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:13,797 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, 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] [2023-03-30 23:28:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:28:13,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:13,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2090083968, now seen corresponding path program 1 times [2023-03-30 23:28:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061672586] [2023-03-30 23:28:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:14,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:28:14,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:14,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061672586] [2023-03-30 23:28:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061672586] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:14,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:28:14,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:28:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871018672] [2023-03-30 23:28:14,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:28:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:28:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:28:14,123 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 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) [2023-03-30 23:28:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:15,136 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2023-03-30 23:28:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:28:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 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 142 [2023-03-30 23:28:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:15,141 INFO L225 Difference]: With dead ends: 1320 [2023-03-30 23:28:15,141 INFO L226 Difference]: Without dead ends: 768 [2023-03-30 23:28:15,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:28:15,143 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 957 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:15,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 55 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:28:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-03-30 23:28:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2023-03-30 23:28:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 550 states have (on average 1.449090909090909) internal successors, (797), 556 states have internal predecessors, (797), 5 states have call successors, (5), 5 states have call predecessors, (5), 10 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-03-30 23:28:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2023-03-30 23:28:15,187 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 142 [2023-03-30 23:28:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:15,193 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2023-03-30 23:28:15,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 19.428571428571427) internal successors, (136), 5 states have internal predecessors, (136), 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) [2023-03-30 23:28:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2023-03-30 23:28:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-03-30 23:28:15,198 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:15,198 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, 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] [2023-03-30 23:28:15,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:28:15,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:15,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -915653427, now seen corresponding path program 1 times [2023-03-30 23:28:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357614265] [2023-03-30 23:28:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:15,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:28:15,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357614265] [2023-03-30 23:28:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357614265] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:15,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844754197] [2023-03-30 23:28:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:15,512 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) [2023-03-30 23:28:15,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:28:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:15,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:28:15,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:28:15,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:28:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844754197] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:15,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:28:15,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-30 23:28:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663657640] [2023-03-30 23:28:15,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:28:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:28:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:28:15,699 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-03-30 23:28:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:16,166 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2023-03-30 23:28:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:28:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 151 [2023-03-30 23:28:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:16,171 INFO L225 Difference]: With dead ends: 1676 [2023-03-30 23:28:16,171 INFO L226 Difference]: Without dead ends: 1116 [2023-03-30 23:28:16,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:28:16,173 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 119 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:16,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 326 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 23:28:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2023-03-30 23:28:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2023-03-30 23:28:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 911 states have (on average 1.3567508232711307) internal successors, (1236), 918 states have internal predecessors, (1236), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2023-03-30 23:28:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2023-03-30 23:28:16,202 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 151 [2023-03-30 23:28:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:16,203 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2023-03-30 23:28:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2023-03-30 23:28:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2023-03-30 23:28:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-03-30 23:28:16,205 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:16,205 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:28:16,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:28:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:16,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:16,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 774699091, now seen corresponding path program 1 times [2023-03-30 23:28:16,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499714393] [2023-03-30 23:28:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:16,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-03-30 23:28:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-30 23:28:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499714393] [2023-03-30 23:28:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499714393] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323132666] [2023-03-30 23:28:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:17,051 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) [2023-03-30 23:28:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:28:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:17,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:28:17,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-03-30 23:28:17,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:28:17,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323132666] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:17,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:28:17,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-30 23:28:17,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250956043] [2023-03-30 23:28:17,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:17,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:28:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:28:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:28:17,562 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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) [2023-03-30 23:28:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:18,273 INFO L93 Difference]: Finished difference Result 2246 states and 3054 transitions. [2023-03-30 23:28:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:28:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 254 [2023-03-30 23:28:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:18,278 INFO L225 Difference]: With dead ends: 2246 [2023-03-30 23:28:18,279 INFO L226 Difference]: Without dead ends: 1320 [2023-03-30 23:28:18,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:28:18,281 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 340 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:18,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 54 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:28:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2023-03-30 23:28:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1318. [2023-03-30 23:28:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1282 states have (on average 1.2769110764430578) internal successors, (1637), 1300 states have internal predecessors, (1637), 9 states have call successors, (9), 9 states have call predecessors, (9), 26 states have return successors, (63), 8 states have call predecessors, (63), 8 states have call successors, (63) [2023-03-30 23:28:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1709 transitions. [2023-03-30 23:28:18,353 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1709 transitions. Word has length 254 [2023-03-30 23:28:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:18,353 INFO L495 AbstractCegarLoop]: Abstraction has 1318 states and 1709 transitions. [2023-03-30 23:28:18,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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) [2023-03-30 23:28:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1709 transitions. [2023-03-30 23:28:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-03-30 23:28:18,357 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:18,357 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:28:18,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:18,557 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,SelfDestructingSolverStorable3 [2023-03-30 23:28:18,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:18,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -309705645, now seen corresponding path program 1 times [2023-03-30 23:28:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:18,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451191220] [2023-03-30 23:28:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:18,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-03-30 23:28:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-03-30 23:28:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 257 proven. 73 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-30 23:28:19,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451191220] [2023-03-30 23:28:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451191220] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:19,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842650678] [2023-03-30 23:28:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:19,305 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) [2023-03-30 23:28:19,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:28:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:19,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:28:19,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-03-30 23:28:19,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:28:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842650678] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:19,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:28:19,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-03-30 23:28:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530438067] [2023-03-30 23:28:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:28:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:28:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:28:19,635 INFO L87 Difference]: Start difference. First operand 1318 states and 1709 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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) [2023-03-30 23:28:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:20,399 INFO L93 Difference]: Finished difference Result 2666 states and 3578 transitions. [2023-03-30 23:28:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:28:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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 327 [2023-03-30 23:28:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:20,405 INFO L225 Difference]: With dead ends: 2666 [2023-03-30 23:28:20,405 INFO L226 Difference]: Without dead ends: 1720 [2023-03-30 23:28:20,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:28:20,408 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 423 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:20,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 54 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 23:28:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2023-03-30 23:28:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1696. [2023-03-30 23:28:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1649 states have (on average 1.2261976955730747) internal successors, (2022), 1674 states have internal predecessors, (2022), 11 states have call successors, (11), 11 states have call predecessors, (11), 35 states have return successors, (96), 10 states have call predecessors, (96), 10 states have call successors, (96) [2023-03-30 23:28:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2129 transitions. [2023-03-30 23:28:20,457 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2129 transitions. Word has length 327 [2023-03-30 23:28:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:20,458 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2129 transitions. [2023-03-30 23:28:20,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 4 states have internal predecessors, (186), 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) [2023-03-30 23:28:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2129 transitions. [2023-03-30 23:28:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-03-30 23:28:20,462 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:20,462 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:28:20,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:20,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:20,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash -719468386, now seen corresponding path program 1 times [2023-03-30 23:28:20,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:20,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144335881] [2023-03-30 23:28:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-03-30 23:28:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-03-30 23:28:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 217 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-30 23:28:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144335881] [2023-03-30 23:28:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144335881] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451844432] [2023-03-30 23:28:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:21,645 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) [2023-03-30 23:28:21,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:28:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:21,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:28:21,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-03-30 23:28:22,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 188 proven. 223 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 23:28:25,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451844432] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:25,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:25,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-03-30 23:28:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796358153] [2023-03-30 23:28:25,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-30 23:28:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-30 23:28:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-03-30 23:28:25,065 INFO L87 Difference]: Start difference. First operand 1696 states and 2129 transitions. Second operand has 22 states, 22 states have (on average 32.86363636363637) internal successors, (723), 21 states have internal predecessors, (723), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:28:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:28,781 INFO L93 Difference]: Finished difference Result 4656 states and 6260 transitions. [2023-03-30 23:28:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-30 23:28:28,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 32.86363636363637) internal successors, (723), 21 states have internal predecessors, (723), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 338 [2023-03-30 23:28:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:28,794 INFO L225 Difference]: With dead ends: 4656 [2023-03-30 23:28:28,794 INFO L226 Difference]: Without dead ends: 3250 [2023-03-30 23:28:28,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=779, Invalid=2527, Unknown=0, NotChecked=0, Total=3306 [2023-03-30 23:28:28,799 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4466 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 4380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:28,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4472 Valid, 129 Invalid, 4380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-30 23:28:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2023-03-30 23:28:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3000. [2023-03-30 23:28:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2924 states have (on average 1.1166210670314638) internal successors, (3265), 2964 states have internal predecessors, (3265), 18 states have call successors, (18), 18 states have call predecessors, (18), 57 states have return successors, (175), 17 states have call predecessors, (175), 17 states have call successors, (175) [2023-03-30 23:28:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 3458 transitions. [2023-03-30 23:28:28,871 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 3458 transitions. Word has length 338 [2023-03-30 23:28:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:28,872 INFO L495 AbstractCegarLoop]: Abstraction has 3000 states and 3458 transitions. [2023-03-30 23:28:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 32.86363636363637) internal successors, (723), 21 states have internal predecessors, (723), 7 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:28:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 3458 transitions. [2023-03-30 23:28:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-03-30 23:28:28,878 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:28,878 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-03-30 23:28:28,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 23:28:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:29,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:29,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:29,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2142018394, now seen corresponding path program 1 times [2023-03-30 23:28:29,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:29,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146547798] [2023-03-30 23:28:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-03-30 23:28:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2023-03-30 23:28:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 305 [2023-03-30 23:28:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 325 proven. 146 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-03-30 23:28:29,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146547798] [2023-03-30 23:28:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146547798] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471412423] [2023-03-30 23:28:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:29,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:29,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:29,371 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) [2023-03-30 23:28:29,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:28:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:29,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:28:29,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-03-30 23:28:29,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 326 proven. 148 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-03-30 23:28:29,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471412423] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:29,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:29,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:28:29,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045342693] [2023-03-30 23:28:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:29,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:28:29,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:28:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:28:29,851 INFO L87 Difference]: Start difference. First operand 3000 states and 3458 transitions. Second operand has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:28:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:31,442 INFO L93 Difference]: Finished difference Result 8226 states and 9943 transitions. [2023-03-30 23:28:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-03-30 23:28:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 439 [2023-03-30 23:28:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:31,457 INFO L225 Difference]: With dead ends: 8226 [2023-03-30 23:28:31,457 INFO L226 Difference]: Without dead ends: 5416 [2023-03-30 23:28:31,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 897 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2023-03-30 23:28:31,464 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1809 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1809 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:31,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1809 Valid, 83 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:28:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2023-03-30 23:28:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 5414. [2023-03-30 23:28:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5414 states, 5288 states have (on average 1.1180030257186082) internal successors, (5912), 5352 states have internal predecessors, (5912), 31 states have call successors, (31), 31 states have call predecessors, (31), 94 states have return successors, (426), 30 states have call predecessors, (426), 30 states have call successors, (426) [2023-03-30 23:28:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5414 states to 5414 states and 6369 transitions. [2023-03-30 23:28:31,587 INFO L78 Accepts]: Start accepts. Automaton has 5414 states and 6369 transitions. Word has length 439 [2023-03-30 23:28:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:31,587 INFO L495 AbstractCegarLoop]: Abstraction has 5414 states and 6369 transitions. [2023-03-30 23:28:31,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.916666666666664) internal successors, (455), 10 states have internal predecessors, (455), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-30 23:28:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5414 states and 6369 transitions. [2023-03-30 23:28:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2023-03-30 23:28:31,598 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:31,599 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:28:31,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:31,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:31,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 974216899, now seen corresponding path program 1 times [2023-03-30 23:28:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100903384] [2023-03-30 23:28:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:28:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:28:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:28:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 501 [2023-03-30 23:28:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 464 proven. 411 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-03-30 23:28:32,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:32,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100903384] [2023-03-30 23:28:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100903384] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:32,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983386260] [2023-03-30 23:28:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:32,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:32,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:32,871 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) [2023-03-30 23:28:32,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:28:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:33,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:28:33,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 874 proven. 2 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2023-03-30 23:28:33,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 652 proven. 74 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-03-30 23:28:33,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983386260] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:33,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:33,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 12 [2023-03-30 23:28:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801418770] [2023-03-30 23:28:33,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:33,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:28:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:28:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:28:33,879 INFO L87 Difference]: Start difference. First operand 5414 states and 6369 transitions. Second operand has 12 states, 12 states have (on average 48.166666666666664) internal successors, (578), 10 states have internal predecessors, (578), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:28:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:35,508 INFO L93 Difference]: Finished difference Result 12864 states and 15207 transitions. [2023-03-30 23:28:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-30 23:28:35,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 48.166666666666664) internal successors, (578), 10 states have internal predecessors, (578), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 635 [2023-03-30 23:28:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:35,533 INFO L225 Difference]: With dead ends: 12864 [2023-03-30 23:28:35,533 INFO L226 Difference]: Without dead ends: 7640 [2023-03-30 23:28:35,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1319 GetRequests, 1293 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2023-03-30 23:28:35,544 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1917 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:35,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 51 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:28:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7640 states. [2023-03-30 23:28:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7640 to 6514. [2023-03-30 23:28:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6372 states have (on average 1.1081293157564345) internal successors, (7061), 6440 states have internal predecessors, (7061), 37 states have call successors, (37), 37 states have call predecessors, (37), 104 states have return successors, (462), 36 states have call predecessors, (462), 36 states have call successors, (462) [2023-03-30 23:28:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 7560 transitions. [2023-03-30 23:28:35,740 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 7560 transitions. Word has length 635 [2023-03-30 23:28:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:35,741 INFO L495 AbstractCegarLoop]: Abstraction has 6514 states and 7560 transitions. [2023-03-30 23:28:35,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.166666666666664) internal successors, (578), 10 states have internal predecessors, (578), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:28:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 7560 transitions. [2023-03-30 23:28:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2023-03-30 23:28:35,751 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:35,751 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:28:35,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:35,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:35,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1227514909, now seen corresponding path program 1 times [2023-03-30 23:28:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193916868] [2023-03-30 23:28:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:28:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:28:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 389 [2023-03-30 23:28:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:36,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2023-03-30 23:28:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:37,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2023-03-30 23:28:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 783 proven. 85 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2023-03-30 23:28:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193916868] [2023-03-30 23:28:37,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193916868] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:37,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993259751] [2023-03-30 23:28:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:37,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:37,185 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) [2023-03-30 23:28:37,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:28:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:37,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:28:37,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 1084 proven. 2 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-03-30 23:28:37,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 793 proven. 74 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-03-30 23:28:39,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993259751] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:39,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:39,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-03-30 23:28:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215076364] [2023-03-30 23:28:39,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:39,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:28:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:28:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:28:39,221 INFO L87 Difference]: Start difference. First operand 6514 states and 7560 transitions. Second operand has 16 states, 16 states have (on average 36.625) internal successors, (586), 14 states have internal predecessors, (586), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-03-30 23:28:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:42,843 INFO L93 Difference]: Finished difference Result 12894 states and 15062 transitions. [2023-03-30 23:28:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-30 23:28:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 36.625) internal successors, (586), 14 states have internal predecessors, (586), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 708 [2023-03-30 23:28:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:42,875 INFO L225 Difference]: With dead ends: 12894 [2023-03-30 23:28:42,876 INFO L226 Difference]: Without dead ends: 5334 [2023-03-30 23:28:42,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1448 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=765, Invalid=2657, Unknown=0, NotChecked=0, Total=3422 [2023-03-30 23:28:42,888 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2758 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2763 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:42,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2763 Valid, 127 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:28:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2023-03-30 23:28:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4476. [2023-03-30 23:28:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4374 states have (on average 1.0608139003200732) internal successors, (4640), 4424 states have internal predecessors, (4640), 26 states have call successors, (26), 26 states have call predecessors, (26), 75 states have return successors, (274), 25 states have call predecessors, (274), 25 states have call successors, (274) [2023-03-30 23:28:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 4940 transitions. [2023-03-30 23:28:42,998 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 4940 transitions. Word has length 708 [2023-03-30 23:28:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 4940 transitions. [2023-03-30 23:28:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.625) internal successors, (586), 14 states have internal predecessors, (586), 6 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-03-30 23:28:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 4940 transitions. [2023-03-30 23:28:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-03-30 23:28:43,005 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:43,005 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2023-03-30 23:28:43,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:43,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:43,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:43,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1166228342, now seen corresponding path program 1 times [2023-03-30 23:28:43,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:43,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610100750] [2023-03-30 23:28:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:43,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:28:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:28:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-03-30 23:28:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2023-03-30 23:28:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-03-30 23:28:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 738 proven. 17 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2023-03-30 23:28:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610100750] [2023-03-30 23:28:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610100750] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150577659] [2023-03-30 23:28:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:44,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:44,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:44,271 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) [2023-03-30 23:28:44,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:28:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:44,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:28:44,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1182 proven. 2 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2023-03-30 23:28:44,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 622 proven. 148 refuted. 0 times theorem prover too weak. 934 trivial. 0 not checked. [2023-03-30 23:28:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150577659] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:44,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2023-03-30 23:28:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630326504] [2023-03-30 23:28:44,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 23:28:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 23:28:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:28:44,750 INFO L87 Difference]: Start difference. First operand 4476 states and 4940 transitions. Second operand has 14 states, 14 states have (on average 42.214285714285715) internal successors, (591), 12 states have internal predecessors, (591), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-30 23:28:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:47,867 INFO L93 Difference]: Finished difference Result 9316 states and 10327 transitions. [2023-03-30 23:28:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-03-30 23:28:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 42.214285714285715) internal successors, (591), 12 states have internal predecessors, (591), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 733 [2023-03-30 23:28:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:47,877 INFO L225 Difference]: With dead ends: 9316 [2023-03-30 23:28:47,877 INFO L226 Difference]: Without dead ends: 5030 [2023-03-30 23:28:47,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1581 GetRequests, 1514 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=3686, Unknown=0, NotChecked=0, Total=4422 [2023-03-30 23:28:47,883 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 4786 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 3464 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4786 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 3464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:47,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4786 Valid, 225 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 3464 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-03-30 23:28:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2023-03-30 23:28:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4838. [2023-03-30 23:28:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4733 states have (on average 1.0483836889921825) internal successors, (4962), 4782 states have internal predecessors, (4962), 28 states have call successors, (28), 28 states have call predecessors, (28), 76 states have return successors, (239), 27 states have call predecessors, (239), 27 states have call successors, (239) [2023-03-30 23:28:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 5229 transitions. [2023-03-30 23:28:47,965 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 5229 transitions. Word has length 733 [2023-03-30 23:28:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:47,966 INFO L495 AbstractCegarLoop]: Abstraction has 4838 states and 5229 transitions. [2023-03-30 23:28:47,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.214285714285715) internal successors, (591), 12 states have internal predecessors, (591), 5 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-30 23:28:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 5229 transitions. [2023-03-30 23:28:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2023-03-30 23:28:47,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:47,975 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:28:47,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:48,180 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,SelfDestructingSolverStorable9 [2023-03-30 23:28:48,181 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:48,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:48,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1222424331, now seen corresponding path program 1 times [2023-03-30 23:28:48,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:48,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058865822] [2023-03-30 23:28:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:28:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:28:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-03-30 23:28:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-03-30 23:28:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-03-30 23:28:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 769 [2023-03-30 23:28:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 438 proven. 7 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2023-03-30 23:28:49,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:49,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058865822] [2023-03-30 23:28:49,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058865822] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:49,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237806368] [2023-03-30 23:28:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:49,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:49,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:49,427 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) [2023-03-30 23:28:49,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 23:28:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:49,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:28:49,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2023-03-30 23:28:49,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:28:49,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237806368] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:28:49,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:28:49,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2023-03-30 23:28:49,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109429420] [2023-03-30 23:28:49,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:28:49,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:28:49,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:28:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:28:49,722 INFO L87 Difference]: Start difference. First operand 4838 states and 5229 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2023-03-30 23:28:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:50,091 INFO L93 Difference]: Finished difference Result 9486 states and 10268 transitions. [2023-03-30 23:28:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:28:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 921 [2023-03-30 23:28:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:50,102 INFO L225 Difference]: With dead ends: 9486 [2023-03-30 23:28:50,102 INFO L226 Difference]: Without dead ends: 4838 [2023-03-30 23:28:50,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-03-30 23:28:50,127 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 121 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:50,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 225 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 23:28:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2023-03-30 23:28:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4474. [2023-03-30 23:28:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4373 states have (on average 1.0432197576034759) internal successors, (4562), 4422 states have internal predecessors, (4562), 26 states have call successors, (26), 26 states have call predecessors, (26), 74 states have return successors, (201), 25 states have call predecessors, (201), 25 states have call successors, (201) [2023-03-30 23:28:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 4789 transitions. [2023-03-30 23:28:50,199 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 4789 transitions. Word has length 921 [2023-03-30 23:28:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:50,200 INFO L495 AbstractCegarLoop]: Abstraction has 4474 states and 4789 transitions. [2023-03-30 23:28:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2023-03-30 23:28:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 4789 transitions. [2023-03-30 23:28:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2023-03-30 23:28:50,209 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:50,210 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:28:50,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:50,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:50,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -604233797, now seen corresponding path program 1 times [2023-03-30 23:28:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316339223] [2023-03-30 23:28:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:28:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:28:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:28:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:28:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-03-30 23:28:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2023-03-30 23:28:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-03-30 23:28:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 769 [2023-03-30 23:28:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 848 [2023-03-30 23:28:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3020 backedges. 994 proven. 113 refuted. 0 times theorem prover too weak. 1913 trivial. 0 not checked. [2023-03-30 23:28:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:28:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316339223] [2023-03-30 23:28:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316339223] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:28:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000261938] [2023-03-30 23:28:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:52,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:28:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:28:52,778 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) [2023-03-30 23:28:52,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 23:28:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:28:53,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:28:53,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:28:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3020 backedges. 1995 proven. 2 refuted. 0 times theorem prover too weak. 1023 trivial. 0 not checked. [2023-03-30 23:28:53,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:28:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3020 backedges. 869 proven. 400 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2023-03-30 23:28:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000261938] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:28:54,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:28:54,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2023-03-30 23:28:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710897082] [2023-03-30 23:28:54,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:28:54,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:28:54,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:28:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:28:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:28:54,598 INFO L87 Difference]: Start difference. First operand 4474 states and 4789 transitions. Second operand has 16 states, 16 states have (on average 50.875) internal successors, (814), 14 states have internal predecessors, (814), 8 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-03-30 23:28:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:28:59,251 INFO L93 Difference]: Finished difference Result 10958 states and 11718 transitions. [2023-03-30 23:28:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 23:28:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 50.875) internal successors, (814), 14 states have internal predecessors, (814), 8 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 982 [2023-03-30 23:28:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:28:59,262 INFO L225 Difference]: With dead ends: 10958 [2023-03-30 23:28:59,263 INFO L226 Difference]: Without dead ends: 6674 [2023-03-30 23:28:59,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2080 GetRequests, 2018 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=3214, Unknown=0, NotChecked=0, Total=3782 [2023-03-30 23:28:59,270 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6213 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 8171 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6213 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 8526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 8171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:28:59,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6213 Valid, 269 Invalid, 8526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 8171 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-30 23:28:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2023-03-30 23:28:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 5570. [2023-03-30 23:28:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5455 states have (on average 1.0306141154903758) internal successors, (5622), 5506 states have internal predecessors, (5622), 32 states have call successors, (32), 32 states have call predecessors, (32), 82 states have return successors, (187), 31 states have call predecessors, (187), 31 states have call successors, (187) [2023-03-30 23:28:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 5841 transitions. [2023-03-30 23:28:59,369 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 5841 transitions. Word has length 982 [2023-03-30 23:28:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:28:59,370 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 5841 transitions. [2023-03-30 23:28:59,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 50.875) internal successors, (814), 14 states have internal predecessors, (814), 8 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-03-30 23:28:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 5841 transitions. [2023-03-30 23:28:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2023-03-30 23:28:59,380 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:28:59,381 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2023-03-30 23:28:59,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 23:28:59,587 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,SelfDestructingSolverStorable11 [2023-03-30 23:28:59,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:28:59,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:28:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 94435116, now seen corresponding path program 1 times [2023-03-30 23:28:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:28:59,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269865978] [2023-03-30 23:28:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:28:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:28:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:29:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:29:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-03-30 23:29:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2023-03-30 23:29:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2023-03-30 23:29:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 521 [2023-03-30 23:29:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 597 [2023-03-30 23:29:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2023-03-30 23:29:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 903 [2023-03-30 23:29:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3229 backedges. 1379 proven. 553 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2023-03-30 23:29:01,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:29:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269865978] [2023-03-30 23:29:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269865978] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:29:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136434173] [2023-03-30 23:29:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:29:01,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:29:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:29:01,557 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) [2023-03-30 23:29:01,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 23:29:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:29:01,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 1462 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:29:01,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:29:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3229 backedges. 2084 proven. 6 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2023-03-30 23:29:02,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:29:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3229 backedges. 1652 proven. 269 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2023-03-30 23:29:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136434173] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:29:02,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:29:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 8] total 25 [2023-03-30 23:29:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328809752] [2023-03-30 23:29:02,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:29:02,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-30 23:29:02,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:29:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-30 23:29:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-03-30 23:29:02,916 INFO L87 Difference]: Start difference. First operand 5570 states and 5841 transitions. Second operand has 25 states, 25 states have (on average 42.44) internal successors, (1061), 23 states have internal predecessors, (1061), 10 states have call successors, (16), 8 states have call predecessors, (16), 12 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17)