/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/Problem11_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:17:17,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:17:17,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:17:17,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:17:17,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:17:17,899 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:17:17,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:17:17,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:17:17,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:17:17,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:17:17,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:17:17,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:17:17,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:17:17,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:17:17,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:17:17,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:17:17,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:17:17,903 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:17:18,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:17:18,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:17:18,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:17:18,130 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:17:18,131 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:17:18,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label40.c [2023-03-30 23:17:19,260 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:17:19,469 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:17:19,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label40.c [2023-03-30 23:17:19,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc11b9295/06624eee9b4c4b1aaa600f5bd972a5ba/FLAG99b3cd684 [2023-03-30 23:17:19,495 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc11b9295/06624eee9b4c4b1aaa600f5bd972a5ba [2023-03-30 23:17:19,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:17:19,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:17:19,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:17:19,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:17:19,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:17:19,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f41b2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19, skipping insertion in model container [2023-03-30 23:17:19,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:17:19,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:17:19,668 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/Problem11_label40.c[6409,6422] [2023-03-30 23:17:19,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:17:19,828 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:17:19,843 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/Problem11_label40.c[6409,6422] [2023-03-30 23:17:19,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:17:19,922 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:17:19,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19 WrapperNode [2023-03-30 23:17:19,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:17:19,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:17:19,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:17:19,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:17:19,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:19,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:20,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:20,009 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:20,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:20,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:17:20,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:17:20,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:17:20,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:17:20,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (1/1) ... [2023-03-30 23:17:20,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:17:20,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:20,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:17:20,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:17:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:17:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:17:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:17:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:17:20,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:17:20,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:17:20,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:17:20,163 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:17:20,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:17:21,257 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:17:21,270 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:17:21,270 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:17:21,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:17:21 BoogieIcfgContainer [2023-03-30 23:17:21,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:17:21,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:17:21,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:17:21,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:17:21,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:17:19" (1/3) ... [2023-03-30 23:17:21,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f795f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:17:21, skipping insertion in model container [2023-03-30 23:17:21,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:17:19" (2/3) ... [2023-03-30 23:17:21,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f795f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:17:21, skipping insertion in model container [2023-03-30 23:17:21,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:17:21" (3/3) ... [2023-03-30 23:17:21,281 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label40.c [2023-03-30 23:17:21,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:17:21,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:17:21,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:17:21,361 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;@31110ba7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:17:21,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:17:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 23:17:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-03-30 23:17:21,376 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:21,377 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] [2023-03-30 23:17:21,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:21,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1933838967, now seen corresponding path program 1 times [2023-03-30 23:17:21,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455363462] [2023-03-30 23:17:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:21,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455363462] [2023-03-30 23:17:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455363462] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:21,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:17:21,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:17:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196369684] [2023-03-30 23:17:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:21,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:17:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:17:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:17:21,883 INFO L87 Difference]: Start difference. First operand has 292 states, 284 states have (on average 1.7077464788732395) internal successors, (485), 285 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:17:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:23,271 INFO L93 Difference]: Finished difference Result 791 states and 1386 transitions. [2023-03-30 23:17:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:17:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 50 [2023-03-30 23:17:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:23,289 INFO L225 Difference]: With dead ends: 791 [2023-03-30 23:17:23,289 INFO L226 Difference]: Without dead ends: 434 [2023-03-30 23:17:23,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:17:23,311 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 645 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:23,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 59 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-30 23:17:23,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-03-30 23:17:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 430. [2023-03-30 23:17:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 420 states have (on average 1.4452380952380952) internal successors, (607), 422 states have internal predecessors, (607), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:17:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 618 transitions. [2023-03-30 23:17:23,382 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 618 transitions. Word has length 50 [2023-03-30 23:17:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:23,383 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 618 transitions. [2023-03-30 23:17:23,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:17:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 618 transitions. [2023-03-30 23:17:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-30 23:17:23,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:23,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:23,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:17:23,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:23,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1677718596, now seen corresponding path program 1 times [2023-03-30 23:17:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:23,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873643444] [2023-03-30 23:17:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:23,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:23,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:23,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873643444] [2023-03-30 23:17:23,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873643444] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:23,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:17:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:17:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913681724] [2023-03-30 23:17:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:23,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:17:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:17:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:23,890 INFO L87 Difference]: Start difference. First operand 430 states and 618 transitions. Second operand has 8 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:25,657 INFO L93 Difference]: Finished difference Result 1664 states and 2471 transitions. [2023-03-30 23:17:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-30 23:17:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2023-03-30 23:17:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:25,664 INFO L225 Difference]: With dead ends: 1664 [2023-03-30 23:17:25,664 INFO L226 Difference]: Without dead ends: 1240 [2023-03-30 23:17:25,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:17:25,666 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1651 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:25,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 146 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:17:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2023-03-30 23:17:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1208. [2023-03-30 23:17:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1181 states have (on average 1.3776460626587637) internal successors, (1627), 1192 states have internal predecessors, (1627), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2023-03-30 23:17:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1690 transitions. [2023-03-30 23:17:25,703 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1690 transitions. Word has length 122 [2023-03-30 23:17:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:25,703 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1690 transitions. [2023-03-30 23:17:25,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1690 transitions. [2023-03-30 23:17:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-03-30 23:17:25,706 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:25,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:25,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:17:25,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:25,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1563063807, now seen corresponding path program 1 times [2023-03-30 23:17:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455984249] [2023-03-30 23:17:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:26,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:26,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455984249] [2023-03-30 23:17:26,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455984249] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:26,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216860213] [2023-03-30 23:17:26,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:26,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:26,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:26,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:26,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:17:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:26,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:26,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:26,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:26,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216860213] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:26,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:26,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:17:26,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029115793] [2023-03-30 23:17:26,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:26,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:26,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:26,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:26,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:26,238 INFO L87 Difference]: Start difference. First operand 1208 states and 1690 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:26,842 INFO L93 Difference]: Finished difference Result 2808 states and 3930 transitions. [2023-03-30 23:17:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 123 [2023-03-30 23:17:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:26,847 INFO L225 Difference]: With dead ends: 2808 [2023-03-30 23:17:26,847 INFO L226 Difference]: Without dead ends: 1606 [2023-03-30 23:17:26,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:26,850 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 158 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:26,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 374 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:17:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-03-30 23:17:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1594. [2023-03-30 23:17:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1558 states have (on average 1.3363286264441592) internal successors, (2082), 1574 states have internal predecessors, (2082), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (89), 9 states have call predecessors, (89), 9 states have call successors, (89) [2023-03-30 23:17:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2181 transitions. [2023-03-30 23:17:26,887 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2181 transitions. Word has length 123 [2023-03-30 23:17:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:26,888 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2181 transitions. [2023-03-30 23:17:26,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2181 transitions. [2023-03-30 23:17:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-03-30 23:17:26,895 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:26,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:26,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 23:17:27,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:27,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:27,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash 635253600, now seen corresponding path program 1 times [2023-03-30 23:17:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:27,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284398654] [2023-03-30 23:17:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:27,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284398654] [2023-03-30 23:17:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284398654] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741110414] [2023-03-30 23:17:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:27,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:27,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:27,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:17:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:27,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:27,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:27,505 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741110414] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:27,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:17:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219147471] [2023-03-30 23:17:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:27,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:27,507 INFO L87 Difference]: Start difference. First operand 1594 states and 2181 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:28,042 INFO L93 Difference]: Finished difference Result 3193 states and 4396 transitions. [2023-03-30 23:17:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:28,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 124 [2023-03-30 23:17:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:28,048 INFO L225 Difference]: With dead ends: 3193 [2023-03-30 23:17:28,048 INFO L226 Difference]: Without dead ends: 1605 [2023-03-30 23:17:28,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:17:28,066 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 173 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:28,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 352 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:17:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2023-03-30 23:17:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1594. [2023-03-30 23:17:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1558 states have (on average 1.3119383825417201) internal successors, (2044), 1574 states have internal predecessors, (2044), 10 states have call successors, (10), 10 states have call predecessors, (10), 25 states have return successors, (87), 9 states have call predecessors, (87), 9 states have call successors, (87) [2023-03-30 23:17:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2141 transitions. [2023-03-30 23:17:28,122 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2141 transitions. Word has length 124 [2023-03-30 23:17:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:28,122 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2141 transitions. [2023-03-30 23:17:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:17:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2141 transitions. [2023-03-30 23:17:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-03-30 23:17:28,124 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:28,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:28,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-30 23:17:28,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:17:28,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:28,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -443096456, now seen corresponding path program 1 times [2023-03-30 23:17:28,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:28,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224346431] [2023-03-30 23:17:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:28,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:28,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224346431] [2023-03-30 23:17:28,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224346431] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:28,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36944142] [2023-03-30 23:17:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:28,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:28,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:28,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:28,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:17:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:29,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:17:29,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:29,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36944142] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:29,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-03-30 23:17:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725270687] [2023-03-30 23:17:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:29,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:17:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:17:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:17:29,364 INFO L87 Difference]: Start difference. First operand 1594 states and 2141 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:30,224 INFO L93 Difference]: Finished difference Result 3832 states and 5174 transitions. [2023-03-30 23:17:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:17:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 144 [2023-03-30 23:17:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:30,232 INFO L225 Difference]: With dead ends: 3832 [2023-03-30 23:17:30,232 INFO L226 Difference]: Without dead ends: 2244 [2023-03-30 23:17:30,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:17:30,235 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 455 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:30,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 127 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-30 23:17:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2023-03-30 23:17:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2210. [2023-03-30 23:17:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2142 states have (on average 1.2380952380952381) internal successors, (2652), 2184 states have internal predecessors, (2652), 13 states have call successors, (13), 13 states have call predecessors, (13), 54 states have return successors, (189), 12 states have call predecessors, (189), 12 states have call successors, (189) [2023-03-30 23:17:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 2854 transitions. [2023-03-30 23:17:30,306 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 2854 transitions. Word has length 144 [2023-03-30 23:17:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:30,306 INFO L495 AbstractCegarLoop]: Abstraction has 2210 states and 2854 transitions. [2023-03-30 23:17:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 4 states have internal predecessors, (138), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:17:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 2854 transitions. [2023-03-30 23:17:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-03-30 23:17:30,309 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:30,309 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, 2, 2, 2, 2, 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] [2023-03-30 23:17:30,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:30,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:30,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:30,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash 556384214, now seen corresponding path program 1 times [2023-03-30 23:17:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:30,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544120673] [2023-03-30 23:17:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:30,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:30,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:17:30,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544120673] [2023-03-30 23:17:30,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544120673] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829549075] [2023-03-30 23:17:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:30,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:30,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:30,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:17:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:30,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:30,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:31,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829549075] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:17:31,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:17:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:17:31,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555306113] [2023-03-30 23:17:31,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:17:31,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:17:31,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:31,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:17:31,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:17:31,262 INFO L87 Difference]: Start difference. First operand 2210 states and 2854 transitions. Second operand has 11 states, 11 states have (on average 34.81818181818182) internal successors, (383), 9 states have internal predecessors, (383), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:17:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:33,170 INFO L93 Difference]: Finished difference Result 4913 states and 6611 transitions. [2023-03-30 23:17:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-30 23:17:33,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.81818181818182) internal successors, (383), 9 states have internal predecessors, (383), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 252 [2023-03-30 23:17:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:33,180 INFO L225 Difference]: With dead ends: 4913 [2023-03-30 23:17:33,181 INFO L226 Difference]: Without dead ends: 2897 [2023-03-30 23:17:33,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 507 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2023-03-30 23:17:33,185 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 970 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:33,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 172 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:17:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-03-30 23:17:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2840. [2023-03-30 23:17:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2739 states have (on average 1.208105147864184) internal successors, (3309), 2808 states have internal predecessors, (3309), 16 states have call successors, (16), 16 states have call predecessors, (16), 84 states have return successors, (278), 15 states have call predecessors, (278), 15 states have call successors, (278) [2023-03-30 23:17:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3603 transitions. [2023-03-30 23:17:33,242 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3603 transitions. Word has length 252 [2023-03-30 23:17:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:33,242 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 3603 transitions. [2023-03-30 23:17:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.81818181818182) internal successors, (383), 9 states have internal predecessors, (383), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 23:17:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3603 transitions. [2023-03-30 23:17:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-03-30 23:17:33,245 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:33,246 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:17:33,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 23:17:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:33,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:33,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1335503437, now seen corresponding path program 1 times [2023-03-30 23:17:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621046757] [2023-03-30 23:17:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:33,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:17:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 82 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-30 23:17:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621046757] [2023-03-30 23:17:34,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621046757] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916940381] [2023-03-30 23:17:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:34,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:34,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:17:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:34,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-30 23:17:34,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-30 23:17:34,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-30 23:17:36,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916940381] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:36,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:17:36,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-03-30 23:17:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009758516] [2023-03-30 23:17:36,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 23:17:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 23:17:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:17:36,136 INFO L87 Difference]: Start difference. First operand 2840 states and 3603 transitions. Second operand has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 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) [2023-03-30 23:17:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:37,644 INFO L93 Difference]: Finished difference Result 8441 states and 11424 transitions. [2023-03-30 23:17:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 23:17:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 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 260 [2023-03-30 23:17:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:37,666 INFO L225 Difference]: With dead ends: 8441 [2023-03-30 23:17:37,666 INFO L226 Difference]: Without dead ends: 5795 [2023-03-30 23:17:37,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:17:37,672 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 633 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:37,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 120 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:17:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2023-03-30 23:17:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5781. [2023-03-30 23:17:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5781 states, 5598 states have (on average 1.239371204001429) internal successors, (6938), 5719 states have internal predecessors, (6938), 31 states have call successors, (31), 31 states have call predecessors, (31), 151 states have return successors, (831), 30 states have call predecessors, (831), 30 states have call successors, (831) [2023-03-30 23:17:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5781 states to 5781 states and 7800 transitions. [2023-03-30 23:17:37,787 INFO L78 Accepts]: Start accepts. Automaton has 5781 states and 7800 transitions. Word has length 260 [2023-03-30 23:17:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:37,787 INFO L495 AbstractCegarLoop]: Abstraction has 5781 states and 7800 transitions. [2023-03-30 23:17:37,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 5 states have internal predecessors, (163), 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) [2023-03-30 23:17:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5781 states and 7800 transitions. [2023-03-30 23:17:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-03-30 23:17:37,791 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:37,791 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:37,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-30 23:17:37,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:37,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:37,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1144925138, now seen corresponding path program 1 times [2023-03-30 23:17:37,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:37,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544244071] [2023-03-30 23:17:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:37,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:38,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:17:38,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544244071] [2023-03-30 23:17:38,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544244071] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145485940] [2023-03-30 23:17:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:38,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:38,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 23:17:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:38,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:17:38,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:17:38,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 90 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:17:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145485940] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:17:39,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:17:39,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2023-03-30 23:17:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912822949] [2023-03-30 23:17:39,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:17:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-30 23:17:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-30 23:17:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-03-30 23:17:39,466 INFO L87 Difference]: Start difference. First operand 5781 states and 7800 transitions. Second operand has 18 states, 18 states have (on average 34.22222222222222) internal successors, (616), 16 states have internal predecessors, (616), 7 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:17:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:46,744 INFO L93 Difference]: Finished difference Result 24416 states and 35176 transitions. [2023-03-30 23:17:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-03-30 23:17:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 34.22222222222222) internal successors, (616), 16 states have internal predecessors, (616), 7 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 270 [2023-03-30 23:17:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:46,802 INFO L225 Difference]: With dead ends: 24416 [2023-03-30 23:17:46,802 INFO L226 Difference]: Without dead ends: 16533 [2023-03-30 23:17:46,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=3585, Unknown=0, NotChecked=0, Total=4422 [2023-03-30 23:17:46,820 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5513 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 8445 mSolverCounterSat, 1495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5513 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 9940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1495 IncrementalHoareTripleChecker+Valid, 8445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:46,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5513 Valid, 427 Invalid, 9940 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1495 Valid, 8445 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-30 23:17:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16533 states. [2023-03-30 23:17:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16533 to 14409. [2023-03-30 23:17:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14409 states, 13988 states have (on average 1.1790820703460108) internal successors, (16493), 14259 states have internal predecessors, (16493), 75 states have call successors, (75), 75 states have call predecessors, (75), 345 states have return successors, (1896), 74 states have call predecessors, (1896), 74 states have call successors, (1896) [2023-03-30 23:17:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14409 states to 14409 states and 18464 transitions. [2023-03-30 23:17:47,239 INFO L78 Accepts]: Start accepts. Automaton has 14409 states and 18464 transitions. Word has length 270 [2023-03-30 23:17:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:47,239 INFO L495 AbstractCegarLoop]: Abstraction has 14409 states and 18464 transitions. [2023-03-30 23:17:47,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 34.22222222222222) internal successors, (616), 16 states have internal predecessors, (616), 7 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-30 23:17:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14409 states and 18464 transitions. [2023-03-30 23:17:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-03-30 23:17:47,248 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:47,249 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, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:47,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:47,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:47,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 473217247, now seen corresponding path program 1 times [2023-03-30 23:17:47,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:47,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800959189] [2023-03-30 23:17:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2023-03-30 23:17:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-03-30 23:17:47,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:47,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800959189] [2023-03-30 23:17:47,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800959189] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:47,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069712642] [2023-03-30 23:17:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:47,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:47,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:47,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 23:17:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:47,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:47,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-03-30 23:17:47,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:47,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069712642] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:47,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:47,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-03-30 23:17:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567522196] [2023-03-30 23:17:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:47,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:47,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:47,930 INFO L87 Difference]: Start difference. First operand 14409 states and 18464 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:48,738 INFO L93 Difference]: Finished difference Result 36030 states and 46831 transitions. [2023-03-30 23:17:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 326 [2023-03-30 23:17:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:48,798 INFO L225 Difference]: With dead ends: 36030 [2023-03-30 23:17:48,798 INFO L226 Difference]: Without dead ends: 22005 [2023-03-30 23:17:48,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:48,826 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 162 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:48,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 346 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 23:17:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22005 states. [2023-03-30 23:17:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22005 to 20869. [2023-03-30 23:17:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20869 states, 20346 states have (on average 1.1506930109112357) internal successors, (23412), 20651 states have internal predecessors, (23412), 109 states have call successors, (109), 109 states have call predecessors, (109), 413 states have return successors, (2650), 108 states have call predecessors, (2650), 108 states have call successors, (2650) [2023-03-30 23:17:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20869 states to 20869 states and 26171 transitions. [2023-03-30 23:17:49,191 INFO L78 Accepts]: Start accepts. Automaton has 20869 states and 26171 transitions. Word has length 326 [2023-03-30 23:17:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:49,192 INFO L495 AbstractCegarLoop]: Abstraction has 20869 states and 26171 transitions. [2023-03-30 23:17:49,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 20869 states and 26171 transitions. [2023-03-30 23:17:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-03-30 23:17:49,202 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:49,202 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:17:49,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:49,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:49,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:49,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1780042704, now seen corresponding path program 1 times [2023-03-30 23:17:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:49,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851727129] [2023-03-30 23:17:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-03-30 23:17:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:50,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851727129] [2023-03-30 23:17:50,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851727129] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:50,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796486857] [2023-03-30 23:17:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:50,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:50,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:50,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 23:17:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:50,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:17:50,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 23:17:50,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:17:50,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796486857] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:17:50,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:17:50,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-03-30 23:17:50,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019858869] [2023-03-30 23:17:50,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:17:50,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:17:50,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:17:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:17:50,628 INFO L87 Difference]: Start difference. First operand 20869 states and 26171 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:51,410 INFO L93 Difference]: Finished difference Result 44962 states and 57112 transitions. [2023-03-30 23:17:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:17:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 356 [2023-03-30 23:17:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:51,474 INFO L225 Difference]: With dead ends: 44962 [2023-03-30 23:17:51,475 INFO L226 Difference]: Without dead ends: 24477 [2023-03-30 23:17:51,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:17:51,508 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 181 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:51,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 326 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:17:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24477 states. [2023-03-30 23:17:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24477 to 23899. [2023-03-30 23:17:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23899 states, 23338 states have (on average 1.1490701859628074) internal successors, (26817), 23649 states have internal predecessors, (26817), 125 states have call successors, (125), 125 states have call predecessors, (125), 435 states have return successors, (3101), 124 states have call predecessors, (3101), 124 states have call successors, (3101) [2023-03-30 23:17:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23899 states to 23899 states and 30043 transitions. [2023-03-30 23:17:52,009 INFO L78 Accepts]: Start accepts. Automaton has 23899 states and 30043 transitions. Word has length 356 [2023-03-30 23:17:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:52,010 INFO L495 AbstractCegarLoop]: Abstraction has 23899 states and 30043 transitions. [2023-03-30 23:17:52,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 23:17:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23899 states and 30043 transitions. [2023-03-30 23:17:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-03-30 23:17:52,045 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:52,045 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:52,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:52,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 23:17:52,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:52,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:52,253 INFO L85 PathProgramCache]: Analyzing trace with hash 907422683, now seen corresponding path program 1 times [2023-03-30 23:17:52,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:52,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213932759] [2023-03-30 23:17:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:52,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:17:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2023-03-30 23:17:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 351 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-03-30 23:17:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213932759] [2023-03-30 23:17:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213932759] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395676188] [2023-03-30 23:17:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:52,670 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:52,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 23:17:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:52,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:17:52,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-30 23:17:53,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-30 23:17:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395676188] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:17:53,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:17:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-03-30 23:17:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40943542] [2023-03-30 23:17:53,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:17:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:17:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:17:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:17:53,524 INFO L87 Difference]: Start difference. First operand 23899 states and 30043 transitions. Second operand has 8 states, 8 states have (on average 68.125) internal successors, (545), 6 states have internal predecessors, (545), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:17:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:17:54,717 INFO L93 Difference]: Finished difference Result 41421 states and 52157 transitions. [2023-03-30 23:17:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:17:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 68.125) internal successors, (545), 6 states have internal predecessors, (545), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 461 [2023-03-30 23:17:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:17:54,769 INFO L225 Difference]: With dead ends: 41421 [2023-03-30 23:17:54,769 INFO L226 Difference]: Without dead ends: 21208 [2023-03-30 23:17:54,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 933 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:17:54,795 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 760 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:17:54,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 107 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:17:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21208 states. [2023-03-30 23:17:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21208 to 19484. [2023-03-30 23:17:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19484 states, 18993 states have (on average 1.1088822197651766) internal successors, (21061), 19280 states have internal predecessors, (21061), 102 states have call successors, (102), 102 states have call predecessors, (102), 388 states have return successors, (1735), 101 states have call predecessors, (1735), 101 states have call successors, (1735) [2023-03-30 23:17:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19484 states to 19484 states and 22898 transitions. [2023-03-30 23:17:55,225 INFO L78 Accepts]: Start accepts. Automaton has 19484 states and 22898 transitions. Word has length 461 [2023-03-30 23:17:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:17:55,226 INFO L495 AbstractCegarLoop]: Abstraction has 19484 states and 22898 transitions. [2023-03-30 23:17:55,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.125) internal successors, (545), 6 states have internal predecessors, (545), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-30 23:17:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 19484 states and 22898 transitions. [2023-03-30 23:17:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-03-30 23:17:55,249 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:17:55,250 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:17:55,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 23:17:55,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:55,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:17:55,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:17:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1824394704, now seen corresponding path program 1 times [2023-03-30 23:17:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:17:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785156201] [2023-03-30 23:17:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:17:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:17:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:17:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:17:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-03-30 23:17:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 333 proven. 44 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-03-30 23:17:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:17:56,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785156201] [2023-03-30 23:17:56,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785156201] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:17:56,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141181383] [2023-03-30 23:17:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:17:56,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:17:56,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:17:56,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:17:56,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 23:17:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:17:56,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 23:17:56,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:17:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 333 proven. 46 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:17:56,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:17:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 377 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-30 23:17:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141181383] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:17:59,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:17:59,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-03-30 23:17:59,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711967876] [2023-03-30 23:17:59,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:17:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 23:17:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:17:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 23:17:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:17:59,203 INFO L87 Difference]: Start difference. First operand 19484 states and 22898 transitions. Second operand has 15 states, 15 states have (on average 42.93333333333333) internal successors, (644), 13 states have internal predecessors, (644), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:18:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:03,738 INFO L93 Difference]: Finished difference Result 43721 states and 51722 transitions. [2023-03-30 23:18:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-30 23:18:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 42.93333333333333) internal successors, (644), 13 states have internal predecessors, (644), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 483 [2023-03-30 23:18:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:03,869 INFO L225 Difference]: With dead ends: 43721 [2023-03-30 23:18:03,869 INFO L226 Difference]: Without dead ends: 24621 [2023-03-30 23:18:03,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-03-30 23:18:03,887 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1673 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5519 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 5519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:03,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1673 Valid, 273 Invalid, 5993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 5519 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-30 23:18:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24621 states. [2023-03-30 23:18:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24621 to 23081. [2023-03-30 23:18:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23081 states, 22538 states have (on average 1.097701659419647) internal successors, (24740), 22839 states have internal predecessors, (24740), 121 states have call successors, (121), 121 states have call predecessors, (121), 421 states have return successors, (1922), 120 states have call predecessors, (1922), 120 states have call successors, (1922) [2023-03-30 23:18:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23081 states to 23081 states and 26783 transitions. [2023-03-30 23:18:04,249 INFO L78 Accepts]: Start accepts. Automaton has 23081 states and 26783 transitions. Word has length 483 [2023-03-30 23:18:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:04,250 INFO L495 AbstractCegarLoop]: Abstraction has 23081 states and 26783 transitions. [2023-03-30 23:18:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 42.93333333333333) internal successors, (644), 13 states have internal predecessors, (644), 7 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:18:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 23081 states and 26783 transitions. [2023-03-30 23:18:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-03-30 23:18:04,278 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:04,279 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 23:18:04,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 23:18:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 23:18:04,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 645225265, now seen corresponding path program 1 times [2023-03-30 23:18:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211415807] [2023-03-30 23:18:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:18:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:18:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:04,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2023-03-30 23:18:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:05,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2023-03-30 23:18:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 532 proven. 93 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-03-30 23:18:05,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211415807] [2023-03-30 23:18:05,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211415807] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:05,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004915564] [2023-03-30 23:18:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:05,064 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:18:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 23:18:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:05,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:18:05,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 847 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-03-30 23:18:05,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 535 proven. 94 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-03-30 23:18:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004915564] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:05,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:05,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:18:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939434345] [2023-03-30 23:18:05,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:05,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:18:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:18:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:18:05,797 INFO L87 Difference]: Start difference. First operand 23081 states and 26783 transitions. Second operand has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:18:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:07,653 INFO L93 Difference]: Finished difference Result 47308 states and 55604 transitions. [2023-03-30 23:18:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-30 23:18:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 568 [2023-03-30 23:18:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:07,720 INFO L225 Difference]: With dead ends: 47308 [2023-03-30 23:18:07,720 INFO L226 Difference]: Without dead ends: 26355 [2023-03-30 23:18:07,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1151 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-03-30 23:18:07,749 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1467 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:07,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 161 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-30 23:18:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2023-03-30 23:18:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 26135. [2023-03-30 23:18:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26135 states, 25538 states have (on average 1.094173388675699) internal successors, (27943), 25861 states have internal predecessors, (27943), 137 states have call successors, (137), 137 states have call predecessors, (137), 459 states have return successors, (2150), 136 states have call predecessors, (2150), 136 states have call successors, (2150) [2023-03-30 23:18:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26135 states to 26135 states and 30230 transitions. [2023-03-30 23:18:08,268 INFO L78 Accepts]: Start accepts. Automaton has 26135 states and 30230 transitions. Word has length 568 [2023-03-30 23:18:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 26135 states and 30230 transitions. [2023-03-30 23:18:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.72727272727273) internal successors, (569), 9 states have internal predecessors, (569), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:18:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26135 states and 30230 transitions. [2023-03-30 23:18:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-03-30 23:18:08,293 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:08,294 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2023-03-30 23:18:08,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-03-30 23:18:08,499 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,SelfDestructingSolverStorable12 [2023-03-30 23:18:08,500 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:08,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash -727557668, now seen corresponding path program 1 times [2023-03-30 23:18:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:08,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102201055] [2023-03-30 23:18:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:08,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2023-03-30 23:18:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2023-03-30 23:18:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 183 proven. 8 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2023-03-30 23:18:08,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:08,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102201055] [2023-03-30 23:18:08,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102201055] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:08,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412900928] [2023-03-30 23:18:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:08,883 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) [2023-03-30 23:18:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 23:18:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:09,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 23:18:09,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-03-30 23:18:09,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:18:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412900928] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:18:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:18:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:18:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669739191] [2023-03-30 23:18:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:18:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:18:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:18:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:18:09,355 INFO L87 Difference]: Start difference. First operand 26135 states and 30230 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 2 states have internal predecessors, (340), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 23:18:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:18:09,842 INFO L93 Difference]: Finished difference Result 49151 states and 56845 transitions. [2023-03-30 23:18:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:18:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 2 states have internal predecessors, (340), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 610 [2023-03-30 23:18:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:18:09,902 INFO L225 Difference]: With dead ends: 49151 [2023-03-30 23:18:09,902 INFO L226 Difference]: Without dead ends: 25146 [2023-03-30 23:18:09,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:18:09,931 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 177 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:18:09,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 46 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-30 23:18:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25146 states. [2023-03-30 23:18:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25146 to 25134. [2023-03-30 23:18:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25134 states, 24566 states have (on average 1.089961735732313) internal successors, (26776), 24870 states have internal predecessors, (26776), 132 states have call successors, (132), 132 states have call predecessors, (132), 435 states have return successors, (1947), 131 states have call predecessors, (1947), 131 states have call successors, (1947) [2023-03-30 23:18:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25134 states to 25134 states and 28855 transitions. [2023-03-30 23:18:10,426 INFO L78 Accepts]: Start accepts. Automaton has 25134 states and 28855 transitions. Word has length 610 [2023-03-30 23:18:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:18:10,427 INFO L495 AbstractCegarLoop]: Abstraction has 25134 states and 28855 transitions. [2023-03-30 23:18:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 2 states have internal predecessors, (340), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 23:18:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 25134 states and 28855 transitions. [2023-03-30 23:18:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2023-03-30 23:18:10,540 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:18:10,540 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:18:10,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-03-30 23:18:10,747 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,SelfDestructingSolverStorable13 [2023-03-30 23:18:10,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:18:10,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:18:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 582330062, now seen corresponding path program 1 times [2023-03-30 23:18:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:18:10,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485479690] [2023-03-30 23:18:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:18:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:18:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:18:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:18:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2023-03-30 23:18:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2023-03-30 23:18:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 16 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-03-30 23:18:11,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:18:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485479690] [2023-03-30 23:18:11,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485479690] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:18:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978078222] [2023-03-30 23:18:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:18:11,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:18:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:18:11,847 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) [2023-03-30 23:18:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-30 23:18:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:18:12,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-30 23:18:12,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:18:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 578 proven. 181 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-03-30 23:18:12,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:18:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 458 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-03-30 23:18:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978078222] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:18:14,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:18:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 15 [2023-03-30 23:18:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494560424] [2023-03-30 23:18:14,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:18:14,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 23:18:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:18:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 23:18:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:18:14,559 INFO L87 Difference]: Start difference. First operand 25134 states and 28855 transitions. Second operand has 15 states, 15 states have (on average 40.06666666666667) internal successors, (601), 13 states have internal predecessors, (601), 6 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11)