/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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:15:12,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:15:12,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:15:12,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:15:12,382 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 23:15:12,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:15:12,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:15:12,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:15:12,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:15:12,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:15:12,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:15:12,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:15:12,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:15:12,403 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:15:12,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:15:12,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:15:12,407 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:15:12,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:15:12,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:15:12,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:15:12,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:15:12,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:15:12,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:15:12,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:15:12,409 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:15:12,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:15:12,409 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:15:12,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:15:12,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:15:12,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:15:12,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:15:12,599 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:15:12,599 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:15:12,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label01.c [2023-03-30 23:15:13,647 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:15:13,894 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:15:13,894 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label01.c [2023-03-30 23:15:13,917 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8270fe8d7/760be2f777a54aa2b9ff6de173ec1a59/FLAG2523a4d6a [2023-03-30 23:15:13,931 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8270fe8d7/760be2f777a54aa2b9ff6de173ec1a59 [2023-03-30 23:15:13,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:15:13,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:15:13,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:15:13,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:15:13,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:15:13,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:15:13" (1/1) ... [2023-03-30 23:15:13,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e43779d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:13, skipping insertion in model container [2023-03-30 23:15:13,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:15:13" (1/1) ... [2023-03-30 23:15:13,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:15:13,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:15:14,139 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_label01.c[8261,8274] [2023-03-30 23:15:14,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:15:14,279 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:15:14,311 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_label01.c[8261,8274] [2023-03-30 23:15:14,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:15:14,474 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:15:14,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14 WrapperNode [2023-03-30 23:15:14,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:15:14,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:15:14,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:15:14,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:15:14,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:15:14,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:15:14,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:15:14,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:15:14,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (1/1) ... [2023-03-30 23:15:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:15:14,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:14,633 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 23:15:14,654 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 23:15:14,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:15:14,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:15:14,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:15:14,677 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:15:14,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:15:14,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:15:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:15:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:15:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:15:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:15:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:15:14,749 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:15:14,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:15:16,074 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:15:16,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:15:16,088 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:15:16,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:15:16 BoogieIcfgContainer [2023-03-30 23:15:16,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:15:16,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:15:16,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:15:16,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:15:16,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:15:13" (1/3) ... [2023-03-30 23:15:16,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3529086c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:15:16, skipping insertion in model container [2023-03-30 23:15:16,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:15:14" (2/3) ... [2023-03-30 23:15:16,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3529086c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:15:16, skipping insertion in model container [2023-03-30 23:15:16,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:15:16" (3/3) ... [2023-03-30 23:15:16,098 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label01.c [2023-03-30 23:15:16,110 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:15:16,110 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:15:16,160 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:15:16,167 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;@4d90055d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:15:16,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:15:16,173 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 23:15:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-30 23:15:16,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:16,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:15:16,183 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:16,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1851763226, now seen corresponding path program 1 times [2023-03-30 23:15:16,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:16,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472903301] [2023-03-30 23:15:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:16,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:16,613 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 23:15:16,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472903301] [2023-03-30 23:15:16,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472903301] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:15:16,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:15:16,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:15:16,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218495059] [2023-03-30 23:15:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:15:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:15:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:15:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:15:16,652 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 5 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 23:15:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:18,430 INFO L93 Difference]: Finished difference Result 999 states and 1795 transitions. [2023-03-30 23:15:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:15:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 63 [2023-03-30 23:15:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:18,448 INFO L225 Difference]: With dead ends: 999 [2023-03-30 23:15:18,448 INFO L226 Difference]: Without dead ends: 639 [2023-03-30 23:15:18,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:15:18,467 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1179 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:18,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 72 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-30 23:15:18,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-03-30 23:15:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 621. [2023-03-30 23:15:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 608 states have (on average 1.5411184210526316) internal successors, (937), 611 states have internal predecessors, (937), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-30 23:15:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 956 transitions. [2023-03-30 23:15:18,549 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 956 transitions. Word has length 63 [2023-03-30 23:15:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:18,550 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 956 transitions. [2023-03-30 23:15:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 23:15:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 956 transitions. [2023-03-30 23:15:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-30 23:15:18,554 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:18,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 23:15:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:15:18,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:18,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1210332130, now seen corresponding path program 1 times [2023-03-30 23:15:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64630660] [2023-03-30 23:15:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:15:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64630660] [2023-03-30 23:15:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64630660] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015910885] [2023-03-30 23:15:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:18,877 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 23:15:18,887 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 23:15:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:18,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:15:18,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:15:19,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:15:19,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015910885] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:15:19,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:15:19,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-30 23:15:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517481004] [2023-03-30 23:15:19,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:15:19,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:15:19,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:15:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:15:19,409 INFO L87 Difference]: Start difference. First operand 621 states and 956 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 23:15:20,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:20,367 INFO L93 Difference]: Finished difference Result 1833 states and 2866 transitions. [2023-03-30 23:15:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:15:20,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 137 [2023-03-30 23:15:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:20,372 INFO L225 Difference]: With dead ends: 1833 [2023-03-30 23:15:20,372 INFO L226 Difference]: Without dead ends: 1218 [2023-03-30 23:15:20,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:15:20,374 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 497 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:20,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 129 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:15:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-03-30 23:15:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1009. [2023-03-30 23:15:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 986 states have (on average 1.3519269776876268) internal successors, (1333), 995 states have internal predecessors, (1333), 7 states have call successors, (7), 7 states have call predecessors, (7), 15 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2023-03-30 23:15:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1374 transitions. [2023-03-30 23:15:20,422 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1374 transitions. Word has length 137 [2023-03-30 23:15:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:20,422 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1374 transitions. [2023-03-30 23:15:20,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 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 23:15:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1374 transitions. [2023-03-30 23:15:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-03-30 23:15:20,428 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:20,428 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:15:20,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:15:20,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:20,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:20,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash 526412396, now seen corresponding path program 1 times [2023-03-30 23:15:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240059104] [2023-03-30 23:15:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:20,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:15:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:15:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240059104] [2023-03-30 23:15:21,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240059104] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:21,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340915524] [2023-03-30 23:15:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:21,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:21,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:21,076 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 23:15:21,149 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 23:15:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:21,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-30 23:15:21,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 71 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:15:22,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-03-30 23:15:22,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340915524] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:22,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-30 23:15:22,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 9] total 13 [2023-03-30 23:15:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899524855] [2023-03-30 23:15:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:15:22,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:15:22,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:15:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:15:22,631 INFO L87 Difference]: Start difference. First operand 1009 states and 1374 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 23:15:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:23,266 INFO L93 Difference]: Finished difference Result 2402 states and 3507 transitions. [2023-03-30 23:15:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:15:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 253 [2023-03-30 23:15:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:23,272 INFO L225 Difference]: With dead ends: 2402 [2023-03-30 23:15:23,272 INFO L226 Difference]: Without dead ends: 1587 [2023-03-30 23:15:23,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:15:23,275 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 174 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:23,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 289 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 23:15:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2023-03-30 23:15:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1585. [2023-03-30 23:15:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1551 states have (on average 1.3623468729851709) internal successors, (2113), 1565 states have internal predecessors, (2113), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (89), 9 states have call predecessors, (89), 9 states have call successors, (89) [2023-03-30 23:15:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2212 transitions. [2023-03-30 23:15:23,308 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2212 transitions. Word has length 253 [2023-03-30 23:15:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:23,309 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2212 transitions. [2023-03-30 23:15:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 23:15:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2212 transitions. [2023-03-30 23:15:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-03-30 23:15:23,313 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:23,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:23,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:15:23,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-30 23:15:23,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:23,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1343153791, now seen corresponding path program 1 times [2023-03-30 23:15:23,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:23,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78022019] [2023-03-30 23:15:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:23,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:23,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:15:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:24,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2023-03-30 23:15:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 173 proven. 155 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-03-30 23:15:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78022019] [2023-03-30 23:15:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78022019] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006762344] [2023-03-30 23:15:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:24,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:24,085 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 23:15:24,087 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 23:15:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:24,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:15:24,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-03-30 23:15:24,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 248 proven. 78 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:15:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006762344] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:24,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:24,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:15:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922018644] [2023-03-30 23:15:24,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:24,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:15:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:15:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:15:24,523 INFO L87 Difference]: Start difference. First operand 1585 states and 2212 transitions. Second operand has 12 states, 12 states have (on average 39.333333333333336) internal successors, (472), 10 states have internal predecessors, (472), 4 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:15:26,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:26,978 INFO L93 Difference]: Finished difference Result 4873 states and 7783 transitions. [2023-03-30 23:15:26,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-03-30 23:15:26,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.333333333333336) internal successors, (472), 10 states have internal predecessors, (472), 4 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 342 [2023-03-30 23:15:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:26,993 INFO L225 Difference]: With dead ends: 4873 [2023-03-30 23:15:26,994 INFO L226 Difference]: Without dead ends: 3482 [2023-03-30 23:15:26,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 713 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2023-03-30 23:15:26,999 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1798 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:26,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 300 Invalid, 2819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 23:15:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2023-03-30 23:15:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2797. [2023-03-30 23:15:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2712 states have (on average 1.3156342182890854) internal successors, (3568), 2765 states have internal predecessors, (3568), 16 states have call successors, (16), 16 states have call predecessors, (16), 68 states have return successors, (312), 15 states have call predecessors, (312), 15 states have call successors, (312) [2023-03-30 23:15:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 3896 transitions. [2023-03-30 23:15:27,115 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 3896 transitions. Word has length 342 [2023-03-30 23:15:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:27,116 INFO L495 AbstractCegarLoop]: Abstraction has 2797 states and 3896 transitions. [2023-03-30 23:15:27,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.333333333333336) internal successors, (472), 10 states have internal predecessors, (472), 4 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-30 23:15:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 3896 transitions. [2023-03-30 23:15:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-03-30 23:15:27,122 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:27,122 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:27,145 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 23:15:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:27,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:27,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1672200945, now seen corresponding path program 1 times [2023-03-30 23:15:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:27,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724325327] [2023-03-30 23:15:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:15:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:15:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 171 proven. 3 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-03-30 23:15:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724325327] [2023-03-30 23:15:27,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724325327] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194721459] [2023-03-30 23:15:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:27,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:27,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:27,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:15:27,690 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 23:15:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:27,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:15:27,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 282 proven. 55 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-03-30 23:15:27,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 335 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-03-30 23:15:28,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194721459] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:28,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:28,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 23:15:28,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193126500] [2023-03-30 23:15:28,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:28,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:15:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:15:28,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:15:28,254 INFO L87 Difference]: Start difference. First operand 2797 states and 3896 transitions. Second operand has 8 states, 8 states have (on average 49.625) internal successors, (397), 6 states have internal predecessors, (397), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-30 23:15:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:29,619 INFO L93 Difference]: Finished difference Result 9003 states and 14538 transitions. [2023-03-30 23:15:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 23:15:29,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 49.625) internal successors, (397), 6 states have internal predecessors, (397), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 350 [2023-03-30 23:15:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:29,695 INFO L225 Difference]: With dead ends: 9003 [2023-03-30 23:15:29,695 INFO L226 Difference]: Without dead ends: 6212 [2023-03-30 23:15:29,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 707 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:15:29,705 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1200 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:29,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 111 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 23:15:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2023-03-30 23:15:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 6075. [2023-03-30 23:15:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6075 states, 5923 states have (on average 1.2942765490460915) internal successors, (7666), 6009 states have internal predecessors, (7666), 33 states have call successors, (33), 33 states have call predecessors, (33), 118 states have return successors, (834), 32 states have call predecessors, (834), 32 states have call successors, (834) [2023-03-30 23:15:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 8533 transitions. [2023-03-30 23:15:29,889 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 8533 transitions. Word has length 350 [2023-03-30 23:15:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:29,890 INFO L495 AbstractCegarLoop]: Abstraction has 6075 states and 8533 transitions. [2023-03-30 23:15:29,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 49.625) internal successors, (397), 6 states have internal predecessors, (397), 3 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-30 23:15:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 8533 transitions. [2023-03-30 23:15:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-03-30 23:15:29,900 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:29,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:29,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 23:15:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:30,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:30,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash -524374788, now seen corresponding path program 1 times [2023-03-30 23:15:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294312900] [2023-03-30 23:15:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:15:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:15:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-03-30 23:15:30,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294312900] [2023-03-30 23:15:30,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294312900] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019901311] [2023-03-30 23:15:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:30,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:30,631 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 23:15:30,649 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 23:15:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:30,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:15:30,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 371 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:15:30,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 371 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-03-30 23:15:31,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019901311] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:31,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:31,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:15:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604301654] [2023-03-30 23:15:31,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:31,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:15:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:31,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:15:31,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:15:31,186 INFO L87 Difference]: Start difference. First operand 6075 states and 8533 transitions. Second operand has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:15:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:33,441 INFO L93 Difference]: Finished difference Result 13843 states and 20371 transitions. [2023-03-30 23:15:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-30 23:15:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 402 [2023-03-30 23:15:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:33,470 INFO L225 Difference]: With dead ends: 13843 [2023-03-30 23:15:33,470 INFO L226 Difference]: Without dead ends: 7774 [2023-03-30 23:15:33,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 816 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-03-30 23:15:33,484 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1046 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:33,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 155 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-30 23:15:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2023-03-30 23:15:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7680. [2023-03-30 23:15:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7680 states, 7468 states have (on average 1.2325923942153187) internal successors, (9205), 7598 states have internal predecessors, (9205), 41 states have call successors, (41), 41 states have call predecessors, (41), 170 states have return successors, (1171), 40 states have call predecessors, (1171), 40 states have call successors, (1171) [2023-03-30 23:15:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 10417 transitions. [2023-03-30 23:15:33,682 INFO L78 Accepts]: Start accepts. Automaton has 7680 states and 10417 transitions. Word has length 402 [2023-03-30 23:15:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 7680 states and 10417 transitions. [2023-03-30 23:15:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 48.833333333333336) internal successors, (586), 10 states have internal predecessors, (586), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:15:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7680 states and 10417 transitions. [2023-03-30 23:15:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-03-30 23:15:33,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:33,701 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:15:33,721 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 23:15:33,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:33,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:33,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1183229965, now seen corresponding path program 1 times [2023-03-30 23:15:33,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956598571] [2023-03-30 23:15:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:15:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2023-03-30 23:15:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-03-30 23:15:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:34,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956598571] [2023-03-30 23:15:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956598571] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635264044] [2023-03-30 23:15:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:34,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:34,358 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 23:15:34,365 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 23:15:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:34,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:15:34,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 176 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-03-30 23:15:35,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 178 proven. 223 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 23:15:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635264044] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:35,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:35,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2023-03-30 23:15:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290328845] [2023-03-30 23:15:35,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 23:15:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 23:15:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:15:35,887 INFO L87 Difference]: Start difference. First operand 7680 states and 10417 transitions. Second operand has 15 states, 15 states have (on average 49.0) internal successors, (735), 13 states have internal predecessors, (735), 6 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:15:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:39,655 INFO L93 Difference]: Finished difference Result 28424 states and 41222 transitions. [2023-03-30 23:15:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-03-30 23:15:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 49.0) internal successors, (735), 13 states have internal predecessors, (735), 6 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 433 [2023-03-30 23:15:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:39,737 INFO L225 Difference]: With dead ends: 28424 [2023-03-30 23:15:39,737 INFO L226 Difference]: Without dead ends: 20938 [2023-03-30 23:15:39,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 882 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2023-03-30 23:15:39,761 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3313 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 978 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3318 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 978 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:39,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3318 Valid, 217 Invalid, 4936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [978 Valid, 3958 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:15:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20938 states. [2023-03-30 23:15:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20938 to 17960. [2023-03-30 23:15:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17960 states, 17513 states have (on average 1.2177239764746188) internal successors, (21326), 17772 states have internal predecessors, (21326), 94 states have call successors, (94), 94 states have call predecessors, (94), 352 states have return successors, (3125), 93 states have call predecessors, (3125), 93 states have call successors, (3125) [2023-03-30 23:15:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17960 states to 17960 states and 24545 transitions. [2023-03-30 23:15:40,201 INFO L78 Accepts]: Start accepts. Automaton has 17960 states and 24545 transitions. Word has length 433 [2023-03-30 23:15:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:40,202 INFO L495 AbstractCegarLoop]: Abstraction has 17960 states and 24545 transitions. [2023-03-30 23:15:40,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 49.0) internal successors, (735), 13 states have internal predecessors, (735), 6 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:15:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 17960 states and 24545 transitions. [2023-03-30 23:15:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-03-30 23:15:40,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:40,230 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:40,235 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 23:15:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:40,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:40,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1897699513, now seen corresponding path program 1 times [2023-03-30 23:15:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:40,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92221130] [2023-03-30 23:15:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:40,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:15:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2023-03-30 23:15:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2023-03-30 23:15:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 500 proven. 2 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-03-30 23:15:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92221130] [2023-03-30 23:15:40,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92221130] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779011725] [2023-03-30 23:15:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:40,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:40,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:40,926 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 23:15:40,945 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 23:15:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:41,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:15:41,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-03-30 23:15:41,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-03-30 23:15:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779011725] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:41,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:41,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2023-03-30 23:15:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035636935] [2023-03-30 23:15:41,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:15:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:15:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:15:41,555 INFO L87 Difference]: Start difference. First operand 17960 states and 24545 transitions. Second operand has 8 states, 8 states have (on average 55.75) internal successors, (446), 6 states have internal predecessors, (446), 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 23:15:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:42,761 INFO L93 Difference]: Finished difference Result 31170 states and 43947 transitions. [2023-03-30 23:15:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:15:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 55.75) internal successors, (446), 6 states have internal predecessors, (446), 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 475 [2023-03-30 23:15:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:42,814 INFO L225 Difference]: With dead ends: 31170 [2023-03-30 23:15:42,814 INFO L226 Difference]: Without dead ends: 14948 [2023-03-30 23:15:42,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 963 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 23:15:42,838 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 873 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:42,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 104 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:15:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14948 states. [2023-03-30 23:15:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14948 to 13888. [2023-03-30 23:15:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13888 states, 13522 states have (on average 1.1554503771631415) internal successors, (15624), 13742 states have internal predecessors, (15624), 73 states have call successors, (73), 73 states have call predecessors, (73), 292 states have return successors, (1653), 72 states have call predecessors, (1653), 72 states have call successors, (1653) [2023-03-30 23:15:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13888 states to 13888 states and 17350 transitions. [2023-03-30 23:15:43,101 INFO L78 Accepts]: Start accepts. Automaton has 13888 states and 17350 transitions. Word has length 475 [2023-03-30 23:15:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:43,102 INFO L495 AbstractCegarLoop]: Abstraction has 13888 states and 17350 transitions. [2023-03-30 23:15:43,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 55.75) internal successors, (446), 6 states have internal predecessors, (446), 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 23:15:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13888 states and 17350 transitions. [2023-03-30 23:15:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2023-03-30 23:15:43,126 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:43,126 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:15:43,145 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 23:15:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:43,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:43,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1384214364, now seen corresponding path program 1 times [2023-03-30 23:15:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:43,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332577749] [2023-03-30 23:15:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:15:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2023-03-30 23:15:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 383 [2023-03-30 23:15:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 336 proven. 210 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-03-30 23:15:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332577749] [2023-03-30 23:15:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332577749] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365782840] [2023-03-30 23:15:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:43,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:43,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:43,928 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 23:15:43,930 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 23:15:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:44,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:15:44,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 775 proven. 2 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-03-30 23:15:44,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 469 proven. 135 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-03-30 23:15:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365782840] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:44,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:44,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:15:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592697703] [2023-03-30 23:15:44,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:44,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:15:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:15:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:15:44,969 INFO L87 Difference]: Start difference. First operand 13888 states and 17350 transitions. Second operand has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 9 states have internal predecessors, (657), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:15:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:47,364 INFO L93 Difference]: Finished difference Result 35877 states and 45640 transitions. [2023-03-30 23:15:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-30 23:15:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 9 states have internal predecessors, (657), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 575 [2023-03-30 23:15:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:47,413 INFO L225 Difference]: With dead ends: 35877 [2023-03-30 23:15:47,413 INFO L226 Difference]: Without dead ends: 21985 [2023-03-30 23:15:47,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1225 GetRequests, 1182 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2023-03-30 23:15:47,436 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1690 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:47,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 218 Invalid, 3676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-30 23:15:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21985 states. [2023-03-30 23:15:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21985 to 21846. [2023-03-30 23:15:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21846 states, 21271 states have (on average 1.1230783696112077) internal successors, (23889), 21618 states have internal predecessors, (23889), 114 states have call successors, (114), 114 states have call predecessors, (114), 460 states have return successors, (2435), 113 states have call predecessors, (2435), 113 states have call successors, (2435) [2023-03-30 23:15:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21846 states to 21846 states and 26438 transitions. [2023-03-30 23:15:47,882 INFO L78 Accepts]: Start accepts. Automaton has 21846 states and 26438 transitions. Word has length 575 [2023-03-30 23:15:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:47,882 INFO L495 AbstractCegarLoop]: Abstraction has 21846 states and 26438 transitions. [2023-03-30 23:15:47,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 9 states have internal predecessors, (657), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:15:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 21846 states and 26438 transitions. [2023-03-30 23:15:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2023-03-30 23:15:47,923 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:47,923 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:15:47,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-30 23:15:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-03-30 23:15:48,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:48,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1244588116, now seen corresponding path program 1 times [2023-03-30 23:15:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052707239] [2023-03-30 23:15:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:48,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:48,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:48,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:15:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2023-03-30 23:15:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:49,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2023-03-30 23:15:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:49,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 537 [2023-03-30 23:15:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 539 proven. 248 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-03-30 23:15:49,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052707239] [2023-03-30 23:15:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052707239] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079515380] [2023-03-30 23:15:49,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:49,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:49,250 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 23:15:49,265 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 23:15:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:49,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-30 23:15:49,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 1189 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-03-30 23:15:51,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 543 proven. 244 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2023-03-30 23:15:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079515380] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:52,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2023-03-30 23:15:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076963359] [2023-03-30 23:15:52,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-30 23:15:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-30 23:15:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:15:52,617 INFO L87 Difference]: Start difference. First operand 21846 states and 26438 transitions. Second operand has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:15:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:55,373 INFO L93 Difference]: Finished difference Result 42826 states and 51874 transitions. [2023-03-30 23:15:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 23:15:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 729 [2023-03-30 23:15:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:55,416 INFO L225 Difference]: With dead ends: 42826 [2023-03-30 23:15:55,416 INFO L226 Difference]: Without dead ends: 21958 [2023-03-30 23:15:55,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1477 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2023-03-30 23:15:55,443 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1105 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:55,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 190 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-30 23:15:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21958 states. [2023-03-30 23:15:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21958 to 21869. [2023-03-30 23:15:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21869 states, 21276 states have (on average 1.1198063545779282) internal successors, (23825), 21641 states have internal predecessors, (23825), 114 states have call successors, (114), 114 states have call predecessors, (114), 478 states have return successors, (2262), 113 states have call predecessors, (2262), 113 states have call successors, (2262) [2023-03-30 23:15:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21869 states to 21869 states and 26201 transitions. [2023-03-30 23:15:55,915 INFO L78 Accepts]: Start accepts. Automaton has 21869 states and 26201 transitions. Word has length 729 [2023-03-30 23:15:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:15:55,915 INFO L495 AbstractCegarLoop]: Abstraction has 21869 states and 26201 transitions. [2023-03-30 23:15:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 47.375) internal successors, (758), 14 states have internal predecessors, (758), 5 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2023-03-30 23:15:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21869 states and 26201 transitions. [2023-03-30 23:15:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-03-30 23:15:55,946 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:15:55,946 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:15:55,952 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 23:15:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-30 23:15:56,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:15:56,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:15:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1022478004, now seen corresponding path program 1 times [2023-03-30 23:15:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:15:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773945019] [2023-03-30 23:15:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:15:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:15:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:15:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2023-03-30 23:15:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2023-03-30 23:15:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 361 [2023-03-30 23:15:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 447 [2023-03-30 23:15:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2023-03-30 23:15:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 619 proven. 168 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2023-03-30 23:15:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:15:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773945019] [2023-03-30 23:15:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773945019] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:15:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631804692] [2023-03-30 23:15:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:15:56,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:15:56,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:15:56,748 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 23:15:56,799 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 23:15:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:15:57,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:15:57,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:15:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 1348 proven. 2 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2023-03-30 23:15:57,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:15:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1927 backedges. 583 proven. 322 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-03-30 23:15:57,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631804692] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:15:57,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:15:57,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-03-30 23:15:57,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313047409] [2023-03-30 23:15:57,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:15:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:15:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:15:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:15:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:15:57,480 INFO L87 Difference]: Start difference. First operand 21869 states and 26201 transitions. Second operand has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 11 states have internal predecessors, (615), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-30 23:15:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:15:59,851 INFO L93 Difference]: Finished difference Result 46017 states and 55161 transitions. [2023-03-30 23:15:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-30 23:15:59,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 11 states have internal predecessors, (615), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 776 [2023-03-30 23:15:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:15:59,905 INFO L225 Difference]: With dead ends: 46017 [2023-03-30 23:15:59,905 INFO L226 Difference]: Without dead ends: 25126 [2023-03-30 23:15:59,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1573 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-03-30 23:15:59,937 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2592 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:15:59,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2592 Valid, 212 Invalid, 3203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-30 23:15:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25126 states. [2023-03-30 23:16:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25126 to 23734. [2023-03-30 23:16:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23734 states, 23129 states have (on average 1.0999178520472135) internal successors, (25440), 23486 states have internal predecessors, (25440), 124 states have call successors, (124), 124 states have call predecessors, (124), 480 states have return successors, (2102), 123 states have call predecessors, (2102), 123 states have call successors, (2102) [2023-03-30 23:16:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23734 states to 23734 states and 27666 transitions. [2023-03-30 23:16:00,368 INFO L78 Accepts]: Start accepts. Automaton has 23734 states and 27666 transitions. Word has length 776 [2023-03-30 23:16:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:16:00,369 INFO L495 AbstractCegarLoop]: Abstraction has 23734 states and 27666 transitions. [2023-03-30 23:16:00,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 11 states have internal predecessors, (615), 5 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-30 23:16:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 23734 states and 27666 transitions. [2023-03-30 23:16:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-03-30 23:16:00,397 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:16:00,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:16:00,405 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 23:16:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 23:16:00,606 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:16:00,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:16:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 351889189, now seen corresponding path program 1 times [2023-03-30 23:16:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:16:00,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648407859] [2023-03-30 23:16:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:16:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:16:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:16:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:16:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-03-30 23:16:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2023-03-30 23:16:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2023-03-30 23:16:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 591 [2023-03-30 23:16:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 436 proven. 388 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-03-30 23:16:01,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:16:01,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648407859] [2023-03-30 23:16:01,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648407859] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:16:01,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933378682] [2023-03-30 23:16:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:16:01,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:16:01,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:16:01,413 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 23:16:01,415 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 23:16:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:01,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-30 23:16:01,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:16:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2023-03-30 23:16:02,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:16:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 437 proven. 391 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2023-03-30 23:16:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933378682] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:16:02,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:16:02,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 14 [2023-03-30 23:16:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891257886] [2023-03-30 23:16:02,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:16:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 23:16:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:16:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 23:16:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:16:02,421 INFO L87 Difference]: Start difference. First operand 23734 states and 27666 transitions. Second operand has 14 states, 14 states have (on average 58.714285714285715) internal successors, (822), 12 states have internal predecessors, (822), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-30 23:16:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:16:05,443 INFO L93 Difference]: Finished difference Result 53634 states and 63022 transitions. [2023-03-30 23:16:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-03-30 23:16:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 58.714285714285715) internal successors, (822), 12 states have internal predecessors, (822), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 783 [2023-03-30 23:16:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:16:05,500 INFO L225 Difference]: With dead ends: 53634 [2023-03-30 23:16:05,501 INFO L226 Difference]: Without dead ends: 30096 [2023-03-30 23:16:05,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1621 GetRequests, 1589 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2023-03-30 23:16:05,533 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2134 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4245 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 4245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:16:05,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2136 Valid, 191 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 4245 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-30 23:16:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30096 states. [2023-03-30 23:16:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30096 to 27366. [2023-03-30 23:16:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27366 states, 26689 states have (on average 1.0850162988497134) internal successors, (28958), 27080 states have internal predecessors, (28958), 143 states have call successors, (143), 143 states have call predecessors, (143), 533 states have return successors, (2086), 142 states have call predecessors, (2086), 142 states have call successors, (2086) [2023-03-30 23:16:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27366 states to 27366 states and 31187 transitions. [2023-03-30 23:16:06,047 INFO L78 Accepts]: Start accepts. Automaton has 27366 states and 31187 transitions. Word has length 783 [2023-03-30 23:16:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:16:06,048 INFO L495 AbstractCegarLoop]: Abstraction has 27366 states and 31187 transitions. [2023-03-30 23:16:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.714285714285715) internal successors, (822), 12 states have internal predecessors, (822), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-30 23:16:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27366 states and 31187 transitions. [2023-03-30 23:16:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2023-03-30 23:16:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:16:06,078 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:16:06,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 23:16:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-30 23:16:06,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:16:06,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:16:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1690607971, now seen corresponding path program 1 times [2023-03-30 23:16:06,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:16:06,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589236722] [2023-03-30 23:16:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:16:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:16:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:06,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:16:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:06,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:16:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-03-30 23:16:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2023-03-30 23:16:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:06,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2023-03-30 23:16:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2023-03-30 23:16:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2023-03-30 23:16:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:07,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 727 [2023-03-30 23:16:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 712 proven. 388 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2023-03-30 23:16:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:16:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589236722] [2023-03-30 23:16:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589236722] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:16:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762731107] [2023-03-30 23:16:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:16:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:16:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:16:07,253 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 23:16:07,253 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 23:16:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:16:07,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-30 23:16:07,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:16:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 1443 proven. 2 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2023-03-30 23:16:07,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:16:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 571 proven. 286 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-03-30 23:16:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762731107] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:16:08,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:16:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2023-03-30 23:16:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744878841] [2023-03-30 23:16:08,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:16:08,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-30 23:16:08,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:16:08,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-30 23:16:08,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-30 23:16:08,380 INFO L87 Difference]: Start difference. First operand 27366 states and 31187 transitions. Second operand has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 11 states have internal predecessors, (688), 5 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10)