/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/Problem15_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:58:34,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:58:34,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:58:34,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:58:34,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:58:34,884 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:58:34,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:58:34,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:58:34,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:58:34,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:58:34,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:58:34,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:58:34,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:58:34,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:58:34,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:58:34,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:58:34,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:58:34,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:58:34,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:58:34,890 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:58:34,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:58:34,890 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:58:34,890 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:58:35,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:58:35,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:58:35,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:58:35,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:58:35,109 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:58:35,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-04-01 22:58:36,386 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:58:36,709 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:58:36,710 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-04-01 22:58:36,728 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30c8c594a/f06f89f158cc4d31ad33f06b9dc546b7/FLAG934246ccc [2023-04-01 22:58:36,743 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30c8c594a/f06f89f158cc4d31ad33f06b9dc546b7 [2023-04-01 22:58:36,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:58:36,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:58:36,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:58:36,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:58:36,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:58:36,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:58:36" (1/1) ... [2023-04-01 22:58:36,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e21d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:36, skipping insertion in model container [2023-04-01 22:58:36,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:58:36" (1/1) ... [2023-04-01 22:58:36,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:58:36,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:58:37,089 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/Problem15_label12.c[7168,7181] [2023-04-01 22:58:37,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:58:37,434 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:58:37,465 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/Problem15_label12.c[7168,7181] [2023-04-01 22:58:37,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:58:37,675 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:58:37,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37 WrapperNode [2023-04-01 22:58:37,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:58:37,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:58:37,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:58:37,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:58:37,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:58:37,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:58:37,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:58:37,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:58:37,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (1/1) ... [2023-04-01 22:58:37,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:58:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:37,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:58:37,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:58:37,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:58:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:58:37,906 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:58:37,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:58:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:58:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:58:37,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:58:37,964 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:58:37,966 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:58:40,290 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:58:40,306 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:58:40,306 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:58:40,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:40 BoogieIcfgContainer [2023-04-01 22:58:40,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:58:40,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:58:40,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:58:40,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:58:40,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:58:36" (1/3) ... [2023-04-01 22:58:40,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15585390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:40, skipping insertion in model container [2023-04-01 22:58:40,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:37" (2/3) ... [2023-04-01 22:58:40,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15585390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:40, skipping insertion in model container [2023-04-01 22:58:40,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:40" (3/3) ... [2023-04-01 22:58:40,318 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2023-04-01 22:58:40,334 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:58:40,334 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:58:40,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:58:40,392 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;@40922f97, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:58:40,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:58:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 22:58:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 22:58:40,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:40,407 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] [2023-04-01 22:58:40,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:40,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash -320428174, now seen corresponding path program 1 times [2023-04-01 22:58:40,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:40,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199200101] [2023-04-01 22:58:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:40,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:58:41,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:41,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199200101] [2023-04-01 22:58:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199200101] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:58:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 22:58:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414624665] [2023-04-01 22:58:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:41,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:58:41,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:41,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:58:41,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 22:58:41,070 INFO L87 Difference]: Start difference. First operand has 437 states, 427 states have (on average 1.7681498829039812) internal successors, (755), 428 states have internal predecessors, (755), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:58:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:44,172 INFO L93 Difference]: Finished difference Result 1199 states and 2164 transitions. [2023-04-01 22:58:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:58:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 65 [2023-04-01 22:58:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:44,188 INFO L225 Difference]: With dead ends: 1199 [2023-04-01 22:58:44,188 INFO L226 Difference]: Without dead ends: 697 [2023-04-01 22:58:44,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:58:44,201 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 977 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:44,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 84 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 22:58:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2023-04-01 22:58:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 691. [2023-04-01 22:58:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 676 states have (on average 1.4718934911242603) internal successors, (995), 678 states have internal predecessors, (995), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 22:58:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1012 transitions. [2023-04-01 22:58:44,279 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1012 transitions. Word has length 65 [2023-04-01 22:58:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:44,280 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 1012 transitions. [2023-04-01 22:58:44,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:58:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1012 transitions. [2023-04-01 22:58:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-01 22:58:44,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:44,286 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:44,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:58:44,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:44,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:44,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1507384734, now seen corresponding path program 1 times [2023-04-01 22:58:44,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:44,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158458152] [2023-04-01 22:58:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:44,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:44,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:58:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158458152] [2023-04-01 22:58:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158458152] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375135051] [2023-04-01 22:58:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:44,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:44,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:44,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:58:44,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:58:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:44,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:58:44,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:58:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:58:44,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:58:44,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375135051] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:44,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:58:44,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:58:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955408630] [2023-04-01 22:58:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:44,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:58:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:58:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:58:44,917 INFO L87 Difference]: Start difference. First operand 691 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:58:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:46,783 INFO L93 Difference]: Finished difference Result 2004 states and 2952 transitions. [2023-04-01 22:58:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:58:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 134 [2023-04-01 22:58:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:46,791 INFO L225 Difference]: With dead ends: 2004 [2023-04-01 22:58:46,791 INFO L226 Difference]: Without dead ends: 1319 [2023-04-01 22:58:46,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:58:46,794 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 277 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:46,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 339 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 22:58:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-04-01 22:58:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2023-04-01 22:58:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1291 states have (on average 1.2982184353214563) internal successors, (1676), 1295 states have internal predecessors, (1676), 10 states have call successors, (10), 10 states have call predecessors, (10), 15 states have return successors, (24), 11 states have call predecessors, (24), 9 states have call successors, (24) [2023-04-01 22:58:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1710 transitions. [2023-04-01 22:58:46,834 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1710 transitions. Word has length 134 [2023-04-01 22:58:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:46,835 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 1710 transitions. [2023-04-01 22:58:46,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:58:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1710 transitions. [2023-04-01 22:58:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-04-01 22:58:46,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:46,841 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, 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] [2023-04-01 22:58:46,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:58:47,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:47,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:47,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:47,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1651877717, now seen corresponding path program 1 times [2023-04-01 22:58:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:47,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504269319] [2023-04-01 22:58:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:47,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:47,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 22:58:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 22:58:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504269319] [2023-04-01 22:58:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504269319] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41332383] [2023-04-01 22:58:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:47,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:58:47,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:58:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:47,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 22:58:47,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:58:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-04-01 22:58:48,157 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:58:48,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41332383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:48,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:58:48,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 22:58:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343915436] [2023-04-01 22:58:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:58:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:58:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:58:48,160 INFO L87 Difference]: Start difference. First operand 1317 states and 1710 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:58:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:50,900 INFO L93 Difference]: Finished difference Result 3608 states and 4796 transitions. [2023-04-01 22:58:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:58:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 239 [2023-04-01 22:58:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:50,911 INFO L225 Difference]: With dead ends: 3608 [2023-04-01 22:58:50,911 INFO L226 Difference]: Without dead ends: 2297 [2023-04-01 22:58:50,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:58:50,915 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 938 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:50,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 215 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 22:58:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2023-04-01 22:58:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2272. [2023-04-01 22:58:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2224 states have (on average 1.2279676258992807) internal successors, (2731), 2235 states have internal predecessors, (2731), 16 states have call successors, (16), 16 states have call predecessors, (16), 31 states have return successors, (59), 20 states have call predecessors, (59), 15 states have call successors, (59) [2023-04-01 22:58:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2806 transitions. [2023-04-01 22:58:50,987 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2806 transitions. Word has length 239 [2023-04-01 22:58:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:50,988 INFO L495 AbstractCegarLoop]: Abstraction has 2272 states and 2806 transitions. [2023-04-01 22:58:50,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 22:58:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2806 transitions. [2023-04-01 22:58:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-04-01 22:58:51,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:51,017 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:51,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 22:58:51,223 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,SelfDestructingSolverStorable2 [2023-04-01 22:58:51,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:51,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1295175383, now seen corresponding path program 1 times [2023-04-01 22:58:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:51,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738662609] [2023-04-01 22:58:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:52,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2023-04-01 22:58:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 133 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:58:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738662609] [2023-04-01 22:58:52,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738662609] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563628693] [2023-04-01 22:58:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:52,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:52,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:52,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:58:52,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:58:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:52,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 22:58:52,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:58:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-01 22:58:53,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:58:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563628693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:53,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:58:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 22:58:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052978818] [2023-04-01 22:58:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:53,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:58:53,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:58:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:58:53,354 INFO L87 Difference]: Start difference. First operand 2272 states and 2806 transitions. Second operand has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:58:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:55,775 INFO L93 Difference]: Finished difference Result 4896 states and 6011 transitions. [2023-04-01 22:58:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:58:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 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 345 [2023-04-01 22:58:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:55,792 INFO L225 Difference]: With dead ends: 4896 [2023-04-01 22:58:55,792 INFO L226 Difference]: Without dead ends: 2630 [2023-04-01 22:58:55,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:58:55,797 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 605 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:55,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 179 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 22:58:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2023-04-01 22:58:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2599. [2023-04-01 22:58:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2599 states, 2538 states have (on average 1.2017336485421592) internal successors, (3050), 2556 states have internal predecessors, (3050), 18 states have call successors, (18), 18 states have call predecessors, (18), 42 states have return successors, (85), 24 states have call predecessors, (85), 17 states have call successors, (85) [2023-04-01 22:58:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 3153 transitions. [2023-04-01 22:58:55,861 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 3153 transitions. Word has length 345 [2023-04-01 22:58:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:55,862 INFO L495 AbstractCegarLoop]: Abstraction has 2599 states and 3153 transitions. [2023-04-01 22:58:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.0) internal successors, (280), 4 states have internal predecessors, (280), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 22:58:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 3153 transitions. [2023-04-01 22:58:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-04-01 22:58:55,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:55,867 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:55,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 22:58:56,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:56,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:56,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2049889806, now seen corresponding path program 1 times [2023-04-01 22:58:56,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:56,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722055816] [2023-04-01 22:58:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:56,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 22:58:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 22:58:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722055816] [2023-04-01 22:58:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722055816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240415615] [2023-04-01 22:58:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:56,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:56,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:58:56,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:58:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:56,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:58:56,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:58:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-04-01 22:58:56,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:58:56,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240415615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:56,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:58:56,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:58:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167101009] [2023-04-01 22:58:56,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:58:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:58:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:58:56,855 INFO L87 Difference]: Start difference. First operand 2599 states and 3153 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:58:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:58:58,389 INFO L93 Difference]: Finished difference Result 6134 states and 7743 transitions. [2023-04-01 22:58:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:58:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 360 [2023-04-01 22:58:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:58:58,407 INFO L225 Difference]: With dead ends: 6134 [2023-04-01 22:58:58,407 INFO L226 Difference]: Without dead ends: 3848 [2023-04-01 22:58:58,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:58:58,412 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 318 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:58:58,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 221 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 22:58:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2023-04-01 22:58:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3848. [2023-04-01 22:58:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3762 states have (on average 1.1977671451355663) internal successors, (4506), 3788 states have internal predecessors, (4506), 26 states have call successors, (26), 26 states have call predecessors, (26), 59 states have return successors, (167), 33 states have call predecessors, (167), 25 states have call successors, (167) [2023-04-01 22:58:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 4699 transitions. [2023-04-01 22:58:58,513 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 4699 transitions. Word has length 360 [2023-04-01 22:58:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:58:58,514 INFO L495 AbstractCegarLoop]: Abstraction has 3848 states and 4699 transitions. [2023-04-01 22:58:58,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:58:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 4699 transitions. [2023-04-01 22:58:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-04-01 22:58:58,524 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:58:58,524 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:58:58,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:58:58,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:58,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:58:58,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:58:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1778586991, now seen corresponding path program 1 times [2023-04-01 22:58:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:58:58,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548025828] [2023-04-01 22:58:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:58:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:58:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:58:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 22:58:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 22:58:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-04-01 22:58:59,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:58:59,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548025828] [2023-04-01 22:58:59,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548025828] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:58:59,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385676402] [2023-04-01 22:58:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:58:59,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:58:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:58:59,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:58:59,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:58:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:58:59,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:58:59,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:58:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-04-01 22:58:59,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:58:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385676402] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:58:59,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:58:59,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:58:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858876946] [2023-04-01 22:58:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:58:59,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:58:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:58:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:58:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:58:59,692 INFO L87 Difference]: Start difference. First operand 3848 states and 4699 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:01,253 INFO L93 Difference]: Finished difference Result 8629 states and 10848 transitions. [2023-04-01 22:59:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 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 528 [2023-04-01 22:59:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:01,288 INFO L225 Difference]: With dead ends: 8629 [2023-04-01 22:59:01,288 INFO L226 Difference]: Without dead ends: 5094 [2023-04-01 22:59:01,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 536 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:59:01,297 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 277 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:01,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 646 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 22:59:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2023-04-01 22:59:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5094. [2023-04-01 22:59:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5094 states, 4985 states have (on average 1.1707121364092277) internal successors, (5836), 5018 states have internal predecessors, (5836), 34 states have call successors, (34), 34 states have call predecessors, (34), 74 states have return successors, (249), 41 states have call predecessors, (249), 33 states have call successors, (249) [2023-04-01 22:59:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5094 states to 5094 states and 6119 transitions. [2023-04-01 22:59:01,413 INFO L78 Accepts]: Start accepts. Automaton has 5094 states and 6119 transitions. Word has length 528 [2023-04-01 22:59:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:01,416 INFO L495 AbstractCegarLoop]: Abstraction has 5094 states and 6119 transitions. [2023-04-01 22:59:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5094 states and 6119 transitions. [2023-04-01 22:59:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-04-01 22:59:01,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:01,426 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:01,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:01,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:01,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:01,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash 111987121, now seen corresponding path program 1 times [2023-04-01 22:59:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129422998] [2023-04-01 22:59:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 22:59:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 177 proven. 3 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2023-04-01 22:59:02,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:02,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129422998] [2023-04-01 22:59:02,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129422998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:02,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919297116] [2023-04-01 22:59:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:02,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:02,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:02,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:02,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 22:59:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:02,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:02,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2023-04-01 22:59:02,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:59:02,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919297116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:02,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:59:02,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 22:59:02,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991619657] [2023-04-01 22:59:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:02,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:02,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:59:02,640 INFO L87 Difference]: Start difference. First operand 5094 states and 6119 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:04,360 INFO L93 Difference]: Finished difference Result 11437 states and 14208 transitions. [2023-04-01 22:59:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 551 [2023-04-01 22:59:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:04,387 INFO L225 Difference]: With dead ends: 11437 [2023-04-01 22:59:04,387 INFO L226 Difference]: Without dead ends: 6656 [2023-04-01 22:59:04,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 558 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:59:04,400 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 287 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:04,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 300 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 22:59:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2023-04-01 22:59:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 6042. [2023-04-01 22:59:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 5906 states have (on average 1.1799864544530985) internal successors, (6969), 5952 states have internal predecessors, (6969), 40 states have call successors, (40), 40 states have call predecessors, (40), 95 states have return successors, (405), 49 states have call predecessors, (405), 39 states have call successors, (405) [2023-04-01 22:59:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 7414 transitions. [2023-04-01 22:59:04,537 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 7414 transitions. Word has length 551 [2023-04-01 22:59:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:04,538 INFO L495 AbstractCegarLoop]: Abstraction has 6042 states and 7414 transitions. [2023-04-01 22:59:04,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 7414 transitions. [2023-04-01 22:59:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2023-04-01 22:59:04,545 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:04,546 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:04,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:04,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:04,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -793731305, now seen corresponding path program 1 times [2023-04-01 22:59:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938726009] [2023-04-01 22:59:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 22:59:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 406 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 22:59:05,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:05,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938726009] [2023-04-01 22:59:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938726009] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:05,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414698745] [2023-04-01 22:59:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:05,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:05,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 22:59:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:05,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:05,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:59:05,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 408 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:59:06,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414698745] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:06,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:06,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:59:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046261828] [2023-04-01 22:59:06,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:59:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:59:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:59:06,217 INFO L87 Difference]: Start difference. First operand 6042 states and 7414 transitions. Second operand has 11 states, 11 states have (on average 63.63636363636363) internal successors, (700), 9 states have internal predecessors, (700), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:10,797 INFO L93 Difference]: Finished difference Result 13511 states and 16993 transitions. [2023-04-01 22:59:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 22:59:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 63.63636363636363) internal successors, (700), 9 states have internal predecessors, (700), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 574 [2023-04-01 22:59:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:10,825 INFO L225 Difference]: With dead ends: 13511 [2023-04-01 22:59:10,826 INFO L226 Difference]: Without dead ends: 7782 [2023-04-01 22:59:10,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1190 GetRequests, 1164 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:59:10,837 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1966 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 5405 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1973 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 5405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1973 Valid, 290 Invalid, 6113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 5405 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 22:59:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2023-04-01 22:59:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 7414. [2023-04-01 22:59:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7196 states have (on average 1.1407726514730405) internal successors, (8209), 7304 states have internal predecessors, (8209), 48 states have call successors, (48), 48 states have call predecessors, (48), 169 states have return successors, (542), 61 states have call predecessors, (542), 47 states have call successors, (542) [2023-04-01 22:59:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 8799 transitions. [2023-04-01 22:59:11,018 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 8799 transitions. Word has length 574 [2023-04-01 22:59:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:11,019 INFO L495 AbstractCegarLoop]: Abstraction has 7414 states and 8799 transitions. [2023-04-01 22:59:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.63636363636363) internal successors, (700), 9 states have internal predecessors, (700), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 8799 transitions. [2023-04-01 22:59:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-04-01 22:59:11,029 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:11,029 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:11,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:11,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:11,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:11,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:11,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1565180477, now seen corresponding path program 1 times [2023-04-01 22:59:11,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:11,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750850245] [2023-04-01 22:59:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:11,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:11,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2023-04-01 22:59:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 343 proven. 79 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 22:59:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750850245] [2023-04-01 22:59:11,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750850245] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:11,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189897921] [2023-04-01 22:59:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:11,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:11,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 22:59:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:12,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:12,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 441 proven. 2 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-04-01 22:59:12,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 344 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 22:59:12,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189897921] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:12,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:59:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203224674] [2023-04-01 22:59:12,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:59:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:59:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:59:12,930 INFO L87 Difference]: Start difference. First operand 7414 states and 8799 transitions. Second operand has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:59:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:17,027 INFO L93 Difference]: Finished difference Result 14603 states and 17416 transitions. [2023-04-01 22:59:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 22:59:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 587 [2023-04-01 22:59:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:17,050 INFO L225 Difference]: With dead ends: 14603 [2023-04-01 22:59:17,050 INFO L226 Difference]: Without dead ends: 7502 [2023-04-01 22:59:17,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1189 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 22:59:17,064 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1455 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 4428 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 4918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 4428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:17,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1455 Valid, 336 Invalid, 4918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 4428 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 22:59:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7502 states. [2023-04-01 22:59:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7502 to 7157. [2023-04-01 22:59:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 6921 states have (on average 1.121080768675047) internal successors, (7759), 7049 states have internal predecessors, (7759), 46 states have call successors, (46), 46 states have call predecessors, (46), 189 states have return successors, (484), 61 states have call predecessors, (484), 45 states have call successors, (484) [2023-04-01 22:59:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 8289 transitions. [2023-04-01 22:59:17,241 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 8289 transitions. Word has length 587 [2023-04-01 22:59:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:17,242 INFO L495 AbstractCegarLoop]: Abstraction has 7157 states and 8289 transitions. [2023-04-01 22:59:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.63636363636364) internal successors, (854), 9 states have internal predecessors, (854), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:59:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 8289 transitions. [2023-04-01 22:59:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-04-01 22:59:17,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:17,252 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:17,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:17,463 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,SelfDestructingSolverStorable8 [2023-04-01 22:59:17,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:17,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1925417368, now seen corresponding path program 1 times [2023-04-01 22:59:17,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761132090] [2023-04-01 22:59:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 22:59:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 438 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-01 22:59:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761132090] [2023-04-01 22:59:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761132090] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510174232] [2023-04-01 22:59:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:18,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:18,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 22:59:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:18,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:18,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:59:20,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-04-01 22:59:23,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510174232] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:23,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:23,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2023-04-01 22:59:23,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614937641] [2023-04-01 22:59:23,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 22:59:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 22:59:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-04-01 22:59:23,020 INFO L87 Difference]: Start difference. First operand 7157 states and 8289 transitions. Second operand has 10 states, 10 states have (on average 79.1) internal successors, (791), 8 states have internal predecessors, (791), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:27,086 INFO L93 Difference]: Finished difference Result 19389 states and 23176 transitions. [2023-04-01 22:59:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 22:59:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 79.1) internal successors, (791), 8 states have internal predecessors, (791), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 604 [2023-04-01 22:59:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:27,125 INFO L225 Difference]: With dead ends: 19389 [2023-04-01 22:59:27,126 INFO L226 Difference]: Without dead ends: 12545 [2023-04-01 22:59:27,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1219 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-04-01 22:59:27,141 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1477 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 3574 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 3574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:27,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 216 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3574 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 22:59:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2023-04-01 22:59:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 10025. [2023-04-01 22:59:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10025 states, 9705 states have (on average 1.1415765069551778) internal successors, (11079), 9878 states have internal predecessors, (11079), 64 states have call successors, (64), 64 states have call predecessors, (64), 255 states have return successors, (899), 82 states have call predecessors, (899), 63 states have call successors, (899) [2023-04-01 22:59:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 12042 transitions. [2023-04-01 22:59:27,358 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 12042 transitions. Word has length 604 [2023-04-01 22:59:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:27,359 INFO L495 AbstractCegarLoop]: Abstraction has 10025 states and 12042 transitions. [2023-04-01 22:59:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 79.1) internal successors, (791), 8 states have internal predecessors, (791), 4 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 22:59:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 12042 transitions. [2023-04-01 22:59:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-04-01 22:59:27,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:27,370 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:27,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:27,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 22:59:27,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:27,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -125130612, now seen corresponding path program 1 times [2023-04-01 22:59:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031316472] [2023-04-01 22:59:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2023-04-01 22:59:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-04-01 22:59:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2023-04-01 22:59:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 332 proven. 244 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-01 22:59:28,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:28,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031316472] [2023-04-01 22:59:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031316472] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582032097] [2023-04-01 22:59:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:28,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:28,393 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:28,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 22:59:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:28,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 22:59:28,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 591 proven. 41 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-04-01 22:59:29,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 244 proven. 498 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-01 22:59:31,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582032097] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:31,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2023-04-01 22:59:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118705769] [2023-04-01 22:59:31,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:31,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 22:59:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 22:59:31,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-04-01 22:59:31,603 INFO L87 Difference]: Start difference. First operand 10025 states and 12042 transitions. Second operand has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:59:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:46,250 INFO L93 Difference]: Finished difference Result 41989 states and 51548 transitions. [2023-04-01 22:59:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-04-01 22:59:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 608 [2023-04-01 22:59:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:46,329 INFO L225 Difference]: With dead ends: 41989 [2023-04-01 22:59:46,329 INFO L226 Difference]: Without dead ends: 27469 [2023-04-01 22:59:46,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1455 GetRequests, 1322 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6948 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2700, Invalid=15122, Unknown=0, NotChecked=0, Total=17822 [2023-04-01 22:59:46,362 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9339 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12031 mSolverCounterSat, 3414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9339 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 15445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3414 IncrementalHoareTripleChecker+Valid, 12031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:46,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9339 Valid, 656 Invalid, 15445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3414 Valid, 12031 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2023-04-01 22:59:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27469 states. [2023-04-01 22:59:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27469 to 23370. [2023-04-01 22:59:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23370 states, 22816 states have (on average 1.0890603085553998) internal successors, (24848), 23055 states have internal predecessors, (24848), 150 states have call successors, (150), 150 states have call predecessors, (150), 403 states have return successors, (2047), 164 states have call predecessors, (2047), 149 states have call successors, (2047) [2023-04-01 22:59:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23370 states to 23370 states and 27045 transitions. [2023-04-01 22:59:46,914 INFO L78 Accepts]: Start accepts. Automaton has 23370 states and 27045 transitions. Word has length 608 [2023-04-01 22:59:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:46,914 INFO L495 AbstractCegarLoop]: Abstraction has 23370 states and 27045 transitions. [2023-04-01 22:59:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 51.578947368421055) internal successors, (980), 17 states have internal predecessors, (980), 7 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:59:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 23370 states and 27045 transitions. [2023-04-01 22:59:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-04-01 22:59:46,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:46,924 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:46,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:47,130 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,SelfDestructingSolverStorable10 [2023-04-01 22:59:47,131 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:47,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash -356672365, now seen corresponding path program 1 times [2023-04-01 22:59:47,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:47,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555681965] [2023-04-01 22:59:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:48,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:48,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:48,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 22:59:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 334 proven. 186 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 22:59:48,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555681965] [2023-04-01 22:59:48,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555681965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:48,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054641338] [2023-04-01 22:59:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:48,837 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:48,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 22:59:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:49,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 22:59:49,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 11 proven. 169 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:49,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:49,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054641338] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:49,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:59:49,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11, 6] total 16 [2023-04-01 22:59:49,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636245859] [2023-04-01 22:59:49,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:49,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:49,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:49,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:49,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:59:49,887 INFO L87 Difference]: Start difference. First operand 23370 states and 27045 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:51,127 INFO L93 Difference]: Finished difference Result 50422 states and 58479 transitions. [2023-04-01 22:59:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:51,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 612 [2023-04-01 22:59:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:51,209 INFO L225 Difference]: With dead ends: 50422 [2023-04-01 22:59:51,209 INFO L226 Difference]: Without dead ends: 27365 [2023-04-01 22:59:51,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1224 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:59:51,247 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 360 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:51,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 475 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 22:59:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27365 states. [2023-04-01 22:59:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27365 to 26129. [2023-04-01 22:59:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26129 states, 25541 states have (on average 1.0693003406287929) internal successors, (27311), 25778 states have internal predecessors, (27311), 168 states have call successors, (168), 168 states have call predecessors, (168), 419 states have return successors, (1935), 182 states have call predecessors, (1935), 167 states have call successors, (1935) [2023-04-01 22:59:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26129 states to 26129 states and 29414 transitions. [2023-04-01 22:59:51,823 INFO L78 Accepts]: Start accepts. Automaton has 26129 states and 29414 transitions. Word has length 612 [2023-04-01 22:59:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:51,824 INFO L495 AbstractCegarLoop]: Abstraction has 26129 states and 29414 transitions. [2023-04-01 22:59:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26129 states and 29414 transitions. [2023-04-01 22:59:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-04-01 22:59:51,848 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:51,849 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:51,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:52,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 22:59:52,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:52,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746746, now seen corresponding path program 1 times [2023-04-01 22:59:52,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344567610] [2023-04-01 22:59:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2023-04-01 22:59:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:52,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 603 [2023-04-01 22:59:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 22:59:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344567610] [2023-04-01 22:59:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344567610] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94916145] [2023-04-01 22:59:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:53,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:53,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:53,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 22:59:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:53,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:53,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 22:59:53,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:59:53,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94916145] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:59:53,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:59:53,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 22:59:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30415948] [2023-04-01 22:59:53,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:59:53,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:59:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:59:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:59:53,358 INFO L87 Difference]: Start difference. First operand 26129 states and 29414 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:59:54,909 INFO L93 Difference]: Finished difference Result 53176 states and 59766 transitions. [2023-04-01 22:59:54,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:59:54,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 758 [2023-04-01 22:59:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:59:54,982 INFO L225 Difference]: With dead ends: 53176 [2023-04-01 22:59:54,982 INFO L226 Difference]: Without dead ends: 27051 [2023-04-01 22:59:55,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:59:55,023 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 265 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:59:55,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 618 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 22:59:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27051 states. [2023-04-01 22:59:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27051 to 25810. [2023-04-01 22:59:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25810 states, 25230 states have (on average 1.0676971858898137) internal successors, (26938), 25465 states have internal predecessors, (26938), 166 states have call successors, (166), 166 states have call predecessors, (166), 413 states have return successors, (1876), 178 states have call predecessors, (1876), 165 states have call successors, (1876) [2023-04-01 22:59:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25810 states to 25810 states and 28980 transitions. [2023-04-01 22:59:55,646 INFO L78 Accepts]: Start accepts. Automaton has 25810 states and 28980 transitions. Word has length 758 [2023-04-01 22:59:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:59:55,647 INFO L495 AbstractCegarLoop]: Abstraction has 25810 states and 28980 transitions. [2023-04-01 22:59:55,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 22:59:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 25810 states and 28980 transitions. [2023-04-01 22:59:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2023-04-01 22:59:55,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:59:55,672 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:59:55,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 22:59:55,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 22:59:55,879 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:59:55,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:59:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1087480013, now seen corresponding path program 1 times [2023-04-01 22:59:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:59:55,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487122337] [2023-04-01 22:59:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:59:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:59:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:59:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:59:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 22:59:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 555 [2023-04-01 22:59:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 621 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2023-04-01 22:59:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:59:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487122337] [2023-04-01 22:59:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487122337] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:59:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091529966] [2023-04-01 22:59:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:59:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:59:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:59:56,743 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:59:56,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 22:59:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:59:56,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:59:56,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:59:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 624 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:57,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:59:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 624 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 22:59:57,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091529966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:59:57,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:59:57,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 22:59:57,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386394888] [2023-04-01 22:59:57,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:59:57,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 22:59:57,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:59:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 22:59:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:59:57,568 INFO L87 Difference]: Start difference. First operand 25810 states and 28980 transitions. Second operand has 11 states, 11 states have (on average 72.0909090909091) internal successors, (793), 9 states have internal predecessors, (793), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:00:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:00,273 INFO L93 Difference]: Finished difference Result 51365 states and 57820 transitions. [2023-04-01 23:00:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:00:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 72.0909090909091) internal successors, (793), 9 states have internal predecessors, (793), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 766 [2023-04-01 23:00:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:00,341 INFO L225 Difference]: With dead ends: 51365 [2023-04-01 23:00:00,341 INFO L226 Difference]: Without dead ends: 25868 [2023-04-01 23:00:00,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 1549 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:00:00,380 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1642 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2898 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:00,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1646 Valid, 249 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2898 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 23:00:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25868 states. [2023-04-01 23:00:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25868 to 24584. [2023-04-01 23:00:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24584 states, 24019 states have (on average 1.0512094591781507) internal successors, (25249), 24255 states have internal predecessors, (25249), 158 states have call successors, (158), 158 states have call predecessors, (158), 406 states have return successors, (1363), 170 states have call predecessors, (1363), 157 states have call successors, (1363) [2023-04-01 23:00:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 26770 transitions. [2023-04-01 23:00:00,921 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 26770 transitions. Word has length 766 [2023-04-01 23:00:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:00,921 INFO L495 AbstractCegarLoop]: Abstraction has 24584 states and 26770 transitions. [2023-04-01 23:00:00,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 72.0909090909091) internal successors, (793), 9 states have internal predecessors, (793), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:00:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 26770 transitions. [2023-04-01 23:00:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2023-04-01 23:00:00,945 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:00,945 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:00,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:00:01,153 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:01,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:01,153 INFO L85 PathProgramCache]: Analyzing trace with hash -714888067, now seen corresponding path program 1 times [2023-04-01 23:00:01,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:01,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003300232] [2023-04-01 23:00:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:01,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:02,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:00:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:03,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 475 [2023-04-01 23:00:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:03,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 561 [2023-04-01 23:00:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 396 proven. 492 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 23:00:03,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003300232] [2023-04-01 23:00:03,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003300232] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:03,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178345433] [2023-04-01 23:00:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:03,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:03,241 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:03,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 23:00:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:03,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:00:03,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 573 proven. 57 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:00:03,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 628 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:00:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178345433] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:05,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:05,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2023-04-01 23:00:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103003106] [2023-04-01 23:00:05,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 23:00:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 23:00:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:00:05,160 INFO L87 Difference]: Start difference. First operand 24584 states and 26770 transitions. Second operand has 19 states, 19 states have (on average 64.78947368421052) internal successors, (1231), 17 states have internal predecessors, (1231), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:00:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:16,932 INFO L93 Difference]: Finished difference Result 65981 states and 71480 transitions. [2023-04-01 23:00:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-04-01 23:00:16,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 64.78947368421052) internal successors, (1231), 17 states have internal predecessors, (1231), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 772 [2023-04-01 23:00:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:16,999 INFO L225 Difference]: With dead ends: 65981 [2023-04-01 23:00:16,999 INFO L226 Difference]: Without dead ends: 41710 [2023-04-01 23:00:17,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1606 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1611, Invalid=7701, Unknown=0, NotChecked=0, Total=9312 [2023-04-01 23:00:17,031 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 13332 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 10395 mSolverCounterSat, 2795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13342 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 13190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2795 IncrementalHoareTripleChecker+Valid, 10395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:17,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13342 Valid, 500 Invalid, 13190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2795 Valid, 10395 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2023-04-01 23:00:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41710 states. [2023-04-01 23:00:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41710 to 36740. [2023-04-01 23:00:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36740 states, 35944 states have (on average 1.0444024037391497) internal successors, (37540), 36254 states have internal predecessors, (37540), 236 states have call successors, (236), 236 states have call predecessors, (236), 559 states have return successors, (1860), 249 states have call predecessors, (1860), 235 states have call successors, (1860) [2023-04-01 23:00:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36740 states to 36740 states and 39636 transitions. [2023-04-01 23:00:17,683 INFO L78 Accepts]: Start accepts. Automaton has 36740 states and 39636 transitions. Word has length 772 [2023-04-01 23:00:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:17,683 INFO L495 AbstractCegarLoop]: Abstraction has 36740 states and 39636 transitions. [2023-04-01 23:00:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.78947368421052) internal successors, (1231), 17 states have internal predecessors, (1231), 8 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:00:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36740 states and 39636 transitions. [2023-04-01 23:00:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-04-01 23:00:17,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:17,716 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:17,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:17,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:17,923 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:17,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:17,923 INFO L85 PathProgramCache]: Analyzing trace with hash 690734662, now seen corresponding path program 1 times [2023-04-01 23:00:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488731007] [2023-04-01 23:00:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:17,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:00:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:18,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 567 [2023-04-01 23:00:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 643 proven. 60 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2023-04-01 23:00:19,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488731007] [2023-04-01 23:00:19,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488731007] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:19,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080879361] [2023-04-01 23:00:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:19,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:19,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:19,029 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:19,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 23:00:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:19,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:00:19,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 779 proven. 84 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 23:00:20,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-04-01 23:00:22,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080879361] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:22,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:22,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 16 [2023-04-01 23:00:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064914335] [2023-04-01 23:00:22,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 23:00:22,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 23:00:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-01 23:00:22,512 INFO L87 Difference]: Start difference. First operand 36740 states and 39636 transitions. Second operand has 16 states, 16 states have (on average 66.8125) internal successors, (1069), 14 states have internal predecessors, (1069), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:00:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:32,542 INFO L93 Difference]: Finished difference Result 84296 states and 90926 transitions. [2023-04-01 23:00:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-04-01 23:00:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 66.8125) internal successors, (1069), 14 states have internal predecessors, (1069), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 819 [2023-04-01 23:00:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:32,640 INFO L225 Difference]: With dead ends: 84296 [2023-04-01 23:00:32,640 INFO L226 Difference]: Without dead ends: 48487 [2023-04-01 23:00:32,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1692 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=907, Invalid=4793, Unknown=0, NotChecked=0, Total=5700 [2023-04-01 23:00:32,686 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 4574 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 12704 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4574 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 13490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 12704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:32,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4574 Valid, 714 Invalid, 13490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 12704 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-04-01 23:00:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48487 states. [2023-04-01 23:00:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48487 to 45064. [2023-04-01 23:00:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45064 states, 44145 states have (on average 1.036470721486012) internal successors, (45755), 44470 states have internal predecessors, (45755), 290 states have call successors, (290), 290 states have call predecessors, (290), 628 states have return successors, (1938), 303 states have call predecessors, (1938), 289 states have call successors, (1938) [2023-04-01 23:00:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 47983 transitions. [2023-04-01 23:00:33,575 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 47983 transitions. Word has length 819 [2023-04-01 23:00:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:33,576 INFO L495 AbstractCegarLoop]: Abstraction has 45064 states and 47983 transitions. [2023-04-01 23:00:33,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 66.8125) internal successors, (1069), 14 states have internal predecessors, (1069), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-04-01 23:00:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 47983 transitions. [2023-04-01 23:00:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2023-04-01 23:00:33,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:33,603 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:33,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 23:00:33,809 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:33,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1423824324, now seen corresponding path program 1 times [2023-04-01 23:00:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:33,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491715395] [2023-04-01 23:00:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-04-01 23:00:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:00:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 705 proven. 2 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-04-01 23:00:35,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:35,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491715395] [2023-04-01 23:00:35,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491715395] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:35,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985764473] [2023-04-01 23:00:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:35,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:35,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 23:00:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:35,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 23:00:35,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 649 proven. 61 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:00:35,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 649 proven. 61 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-04-01 23:00:36,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985764473] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:36,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:36,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-04-01 23:00:36,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763307928] [2023-04-01 23:00:36,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:36,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:00:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:00:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:00:36,416 INFO L87 Difference]: Start difference. First operand 45064 states and 47983 transitions. Second operand has 15 states, 15 states have (on average 69.86666666666666) internal successors, (1048), 13 states have internal predecessors, (1048), 6 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 23:00:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:00:46,151 INFO L93 Difference]: Finished difference Result 94893 states and 101066 transitions. [2023-04-01 23:00:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-04-01 23:00:46,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 69.86666666666666) internal successors, (1048), 13 states have internal predecessors, (1048), 6 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 825 [2023-04-01 23:00:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:00:46,242 INFO L225 Difference]: With dead ends: 94893 [2023-04-01 23:00:46,242 INFO L226 Difference]: Without dead ends: 50760 [2023-04-01 23:00:46,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1816 GetRequests, 1723 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1594, Invalid=7148, Unknown=0, NotChecked=0, Total=8742 [2023-04-01 23:00:46,282 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 5495 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 9807 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5502 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 11202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 9807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:00:46,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5502 Valid, 607 Invalid, 11202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1395 Valid, 9807 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-01 23:00:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50760 states. [2023-04-01 23:00:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50760 to 47628. [2023-04-01 23:00:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47628 states, 46637 states have (on average 1.0334283937646076) internal successors, (48196), 47002 states have internal predecessors, (48196), 306 states have call successors, (306), 306 states have call predecessors, (306), 684 states have return successors, (1876), 319 states have call predecessors, (1876), 305 states have call successors, (1876) [2023-04-01 23:00:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47628 states to 47628 states and 50378 transitions. [2023-04-01 23:00:46,933 INFO L78 Accepts]: Start accepts. Automaton has 47628 states and 50378 transitions. Word has length 825 [2023-04-01 23:00:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:00:46,934 INFO L495 AbstractCegarLoop]: Abstraction has 47628 states and 50378 transitions. [2023-04-01 23:00:46,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.86666666666666) internal successors, (1048), 13 states have internal predecessors, (1048), 6 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 23:00:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47628 states and 50378 transitions. [2023-04-01 23:00:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2023-04-01 23:00:46,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:00:46,956 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:00:46,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 23:00:47,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-01 23:00:47,157 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:00:47,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:00:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -989687854, now seen corresponding path program 1 times [2023-04-01 23:00:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:00:47,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206402392] [2023-04-01 23:00:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:00:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:00:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:00:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:00:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2023-04-01 23:00:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2023-04-01 23:00:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 655 proven. 60 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-04-01 23:00:48,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:00:48,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206402392] [2023-04-01 23:00:48,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206402392] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:00:48,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951672690] [2023-04-01 23:00:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:00:48,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:00:48,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:00:48,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:00:48,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 23:00:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:00:48,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 23:00:48,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:00:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 701 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:00:50,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:00:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 716 proven. 2 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-04-01 23:00:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951672690] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:00:52,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:00:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 6] total 22 [2023-04-01 23:00:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830622818] [2023-04-01 23:00:52,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:00:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 23:00:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:00:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 23:00:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-04-01 23:00:52,523 INFO L87 Difference]: Start difference. First operand 47628 states and 50378 transitions. Second operand has 22 states, 22 states have (on average 60.5) internal successors, (1331), 20 states have internal predecessors, (1331), 9 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:01:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:01:08,419 INFO L93 Difference]: Finished difference Result 108946 states and 115293 transitions. [2023-04-01 23:01:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-04-01 23:01:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 60.5) internal successors, (1331), 20 states have internal predecessors, (1331), 9 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 831 [2023-04-01 23:01:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:01:08,539 INFO L225 Difference]: With dead ends: 108946 [2023-04-01 23:01:08,539 INFO L226 Difference]: Without dead ends: 63194 [2023-04-01 23:01:08,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1870 GetRequests, 1748 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2600, Invalid=12652, Unknown=0, NotChecked=0, Total=15252 [2023-04-01 23:01:08,593 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 8845 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 21487 mSolverCounterSat, 1934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8845 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 23421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1934 IncrementalHoareTripleChecker+Valid, 21487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:01:08,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8845 Valid, 880 Invalid, 23421 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1934 Valid, 21487 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2023-04-01 23:01:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63194 states. [2023-04-01 23:01:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63194 to 53595. [2023-04-01 23:01:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53595 states, 52479 states have (on average 1.0339945502010328) internal successors, (54263), 52893 states have internal predecessors, (54263), 344 states have call successors, (344), 344 states have call predecessors, (344), 771 states have return successors, (2152), 357 states have call predecessors, (2152), 343 states have call successors, (2152) [2023-04-01 23:01:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53595 states to 53595 states and 56759 transitions. [2023-04-01 23:01:09,520 INFO L78 Accepts]: Start accepts. Automaton has 53595 states and 56759 transitions. Word has length 831 [2023-04-01 23:01:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:01:09,521 INFO L495 AbstractCegarLoop]: Abstraction has 53595 states and 56759 transitions. [2023-04-01 23:01:09,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.5) internal successors, (1331), 20 states have internal predecessors, (1331), 9 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 23:01:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 53595 states and 56759 transitions. [2023-04-01 23:01:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2023-04-01 23:01:09,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:01:09,585 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:01:09,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-01 23:01:09,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 23:01:09,786 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:01:09,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:01:09,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1185573573, now seen corresponding path program 1 times [2023-04-01 23:01:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:01:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821447716] [2023-04-01 23:01:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:01:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:01:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:01:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2023-04-01 23:01:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:10,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-04-01 23:01:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:11,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 791 [2023-04-01 23:01:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:11,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 879 [2023-04-01 23:01:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 741 proven. 238 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2023-04-01 23:01:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:01:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821447716] [2023-04-01 23:01:11,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821447716] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105847220] [2023-04-01 23:01:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:01:11,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:01:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:01:11,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:01:11,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-01 23:01:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:01:11,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 23:01:11,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:01:52,222 WARN L223 SmtUtils]: Spent 39.02s on a formula simplification. DAG size of input: 140 DAG size of output: 129 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 23:01:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 8 proven. 1016 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2023-04-01 23:01:53,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:01:56,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105847220] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:01:56,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:01:56,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2023-04-01 23:01:56,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119475554] [2023-04-01 23:01:56,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:01:56,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:01:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:01:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:01:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 23:01:56,032 INFO L87 Difference]: Start difference. First operand 53595 states and 56759 transitions. Second operand has 14 states, 14 states have (on average 76.57142857142857) internal successors, (1072), 12 states have internal predecessors, (1072), 6 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10)