/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/Problem16_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:35:15,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:35:15,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:35:15,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:35:15,384 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 23:35:15,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:35:15,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:35:15,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:35:15,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:35:15,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:35:15,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:35:15,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:35:15,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:35:15,416 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:35:15,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:35:15,417 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:35:15,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:35:15,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:35:15,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:35:15,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:35:15,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:35:15,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:35:15,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:35:15,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:35:15,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:35:15,420 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:35:15,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:35:15,420 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:35:15,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:35:15,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:35:15,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:35:15,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:35:15,631 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:35:15,632 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:35:15,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label10.c [2023-03-30 23:35:16,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:35:17,003 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:35:17,003 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label10.c [2023-03-30 23:35:17,020 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf11d8de/e07ad2f8cbd845bd9df39d937d7098f5/FLAGd6880647a [2023-03-30 23:35:17,038 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bf11d8de/e07ad2f8cbd845bd9df39d937d7098f5 [2023-03-30 23:35:17,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:35:17,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:35:17,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:35:17,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:35:17,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:35:17,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691d5ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17, skipping insertion in model container [2023-03-30 23:35:17,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:35:17,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:35:17,289 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/Problem16_label10.c[3517,3530] [2023-03-30 23:35:17,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:35:17,660 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:35:17,689 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/Problem16_label10.c[3517,3530] [2023-03-30 23:35:17,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:35:17,850 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:35:17,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17 WrapperNode [2023-03-30 23:35:17,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:35:17,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:35:17,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:35:17,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:35:17,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:17,996 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:18,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:18,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:35:18,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:35:18,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:35:18,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:35:18,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (1/1) ... [2023-03-30 23:35:18,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:35:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:18,049 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 23:35:18,068 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 23:35:18,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:35:18,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:35:18,093 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:35:18,093 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:35:18,093 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:35:18,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:35:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:35:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:35:18,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:35:18,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:35:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:35:18,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:35:18,174 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:35:18,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:35:19,950 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:35:19,959 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:35:19,959 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:35:19,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:35:19 BoogieIcfgContainer [2023-03-30 23:35:19,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:35:19,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:35:19,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:35:19,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:35:19,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:35:17" (1/3) ... [2023-03-30 23:35:19,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c86841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:35:19, skipping insertion in model container [2023-03-30 23:35:19,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:35:17" (2/3) ... [2023-03-30 23:35:19,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c86841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:35:19, skipping insertion in model container [2023-03-30 23:35:19,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:35:19" (3/3) ... [2023-03-30 23:35:19,967 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label10.c [2023-03-30 23:35:19,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:35:19,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:35:20,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:35:20,050 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;@675dae86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:35:20,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:35:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 23:35:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 23:35:20,062 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:20,062 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] [2023-03-30 23:35:20,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:20,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1919392351, now seen corresponding path program 1 times [2023-03-30 23:35:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818432054] [2023-03-30 23:35:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:20,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:20,501 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 23:35:20,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818432054] [2023-03-30 23:35:20,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818432054] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:35:20,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:35:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:35:20,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797316455] [2023-03-30 23:35:20,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:35:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:35:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:35:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:35:20,534 INFO L87 Difference]: Start difference. First operand has 409 states, 399 states have (on average 1.8245614035087718) internal successors, (728), 400 states have internal predecessors, (728), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 23:35:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:24,065 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2023-03-30 23:35:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:35:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 38 [2023-03-30 23:35:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:24,086 INFO L225 Difference]: With dead ends: 1515 [2023-03-30 23:35:24,086 INFO L226 Difference]: Without dead ends: 1038 [2023-03-30 23:35:24,097 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 23:35:24,103 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2294 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:24,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2294 Valid, 41 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-03-30 23:35:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-03-30 23:35:24,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2023-03-30 23:35:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1010 states have (on average 1.5712871287128714) internal successors, (1587), 1013 states have internal predecessors, (1587), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (24), 9 states have call predecessors, (24), 7 states have call successors, (24) [2023-03-30 23:35:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2023-03-30 23:35:24,193 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 38 [2023-03-30 23:35:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:24,194 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2023-03-30 23:35:24,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 23:35:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2023-03-30 23:35:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-30 23:35:24,198 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:24,198 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:35:24,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:24,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1570936947, now seen corresponding path program 1 times [2023-03-30 23:35:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:24,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867345232] [2023-03-30 23:35:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:35:24,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867345232] [2023-03-30 23:35:24,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867345232] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:35:24,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:35:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:35:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344575430] [2023-03-30 23:35:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:35:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:35:24,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:35:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:35:24,613 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 23:35:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:27,697 INFO L93 Difference]: Finished difference Result 4166 states and 6714 transitions. [2023-03-30 23:35:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:35:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 121 [2023-03-30 23:35:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:27,716 INFO L225 Difference]: With dead ends: 4166 [2023-03-30 23:35:27,717 INFO L226 Difference]: Without dead ends: 3141 [2023-03-30 23:35:27,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:35:27,726 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2590 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:27,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2590 Valid, 96 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 2699 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-30 23:35:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2023-03-30 23:35:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 3114. [2023-03-30 23:35:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3043 states have (on average 1.422280644101216) internal successors, (4328), 3063 states have internal predecessors, (4328), 20 states have call successors, (20), 20 states have call predecessors, (20), 50 states have return successors, (180), 30 states have call predecessors, (180), 19 states have call successors, (180) [2023-03-30 23:35:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 4528 transitions. [2023-03-30 23:35:27,853 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 4528 transitions. Word has length 121 [2023-03-30 23:35:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:27,855 INFO L495 AbstractCegarLoop]: Abstraction has 3114 states and 4528 transitions. [2023-03-30 23:35:27,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 5 states have internal predecessors, (115), 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 23:35:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 4528 transitions. [2023-03-30 23:35:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-03-30 23:35:27,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:27,870 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:35:27,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:35:27,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:27,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1009124849, now seen corresponding path program 1 times [2023-03-30 23:35:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:27,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596996341] [2023-03-30 23:35:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:28,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-03-30 23:35:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 23:35:28,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596996341] [2023-03-30 23:35:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596996341] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251900449] [2023-03-30 23:35:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:28,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:28,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:28,385 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 23:35:28,411 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 23:35:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:28,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:35:28,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:35:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:35:28,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:35:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:35:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251900449] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:35:29,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:35:29,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:35:29,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66717484] [2023-03-30 23:35:29,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:35:29,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:35:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:35:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:35:29,175 INFO L87 Difference]: Start difference. First operand 3114 states and 4528 transitions. Second operand has 12 states, 12 states have (on average 30.75) internal successors, (369), 10 states have internal predecessors, (369), 4 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:35:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:32,053 INFO L93 Difference]: Finished difference Result 8299 states and 12428 transitions. [2023-03-30 23:35:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 23:35:32,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 30.75) internal successors, (369), 10 states have internal predecessors, (369), 4 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 212 [2023-03-30 23:35:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:32,078 INFO L225 Difference]: With dead ends: 8299 [2023-03-30 23:35:32,078 INFO L226 Difference]: Without dead ends: 5191 [2023-03-30 23:35:32,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-03-30 23:35:32,086 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1666 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:32,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 77 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 3066 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:35:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2023-03-30 23:35:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3804. [2023-03-30 23:35:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3717 states have (on average 1.4057035243475922) internal successors, (5225), 3745 states have internal predecessors, (5225), 24 states have call successors, (24), 24 states have call predecessors, (24), 62 states have return successors, (238), 34 states have call predecessors, (238), 23 states have call successors, (238) [2023-03-30 23:35:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 5487 transitions. [2023-03-30 23:35:32,201 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 5487 transitions. Word has length 212 [2023-03-30 23:35:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 5487 transitions. [2023-03-30 23:35:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.75) internal successors, (369), 10 states have internal predecessors, (369), 4 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-30 23:35:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 5487 transitions. [2023-03-30 23:35:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-03-30 23:35:32,205 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:32,206 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-03-30 23:35:32,215 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 23:35:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:32,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:32,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1171177188, now seen corresponding path program 1 times [2023-03-30 23:35:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292739608] [2023-03-30 23:35:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-30 23:35:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 23:35:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292739608] [2023-03-30 23:35:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292739608] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026116645] [2023-03-30 23:35:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:33,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:33,017 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 23:35:33,042 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 23:35:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:33,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:35:33,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:35:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:35:33,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:35:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:35:33,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026116645] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:35:33,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:35:33,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-03-30 23:35:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244718487] [2023-03-30 23:35:33,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:35:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:35:33,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:35:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:35:33,613 INFO L87 Difference]: Start difference. First operand 3804 states and 5487 transitions. Second operand has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:35:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:36,418 INFO L93 Difference]: Finished difference Result 9366 states and 13390 transitions. [2023-03-30 23:35:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-30 23:35:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 253 [2023-03-30 23:35:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:36,445 INFO L225 Difference]: With dead ends: 9366 [2023-03-30 23:35:36,446 INFO L226 Difference]: Without dead ends: 5568 [2023-03-30 23:35:36,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:35:36,456 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3884 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3884 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 3526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:36,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3884 Valid, 98 Invalid, 3526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 23:35:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2023-03-30 23:35:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 4510. [2023-03-30 23:35:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4401 states have (on average 1.2717564189956827) internal successors, (5597), 4439 states have internal predecessors, (5597), 28 states have call successors, (28), 28 states have call predecessors, (28), 80 states have return successors, (293), 42 states have call predecessors, (293), 27 states have call successors, (293) [2023-03-30 23:35:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5918 transitions. [2023-03-30 23:35:36,594 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5918 transitions. Word has length 253 [2023-03-30 23:35:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:36,595 INFO L495 AbstractCegarLoop]: Abstraction has 4510 states and 5918 transitions. [2023-03-30 23:35:36,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.416666666666664) internal successors, (473), 10 states have internal predecessors, (473), 4 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-30 23:35:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5918 transitions. [2023-03-30 23:35:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-03-30 23:35:36,602 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:36,602 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:35:36,617 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 23:35:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:35:36,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:36,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash 520084364, now seen corresponding path program 1 times [2023-03-30 23:35:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432402726] [2023-03-30 23:35:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:37,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-03-30 23:35:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2023-03-30 23:35:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 194 proven. 114 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-03-30 23:35:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:37,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432402726] [2023-03-30 23:35:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432402726] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889941605] [2023-03-30 23:35:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:37,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:37,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:37,985 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 23:35:37,994 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 23:35:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:38,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:35:38,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:35:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 309 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-30 23:35:38,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:35:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 309 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-03-30 23:35:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889941605] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:35:38,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:35:38,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-03-30 23:35:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106757167] [2023-03-30 23:35:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:35:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 23:35:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 23:35:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:35:38,647 INFO L87 Difference]: Start difference. First operand 4510 states and 5918 transitions. Second operand has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 12 states have internal predecessors, (527), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-30 23:35:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:45,459 INFO L93 Difference]: Finished difference Result 12504 states and 16895 transitions. [2023-03-30 23:35:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-03-30 23:35:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 12 states have internal predecessors, (527), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 382 [2023-03-30 23:35:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:45,487 INFO L225 Difference]: With dead ends: 12504 [2023-03-30 23:35:45,487 INFO L226 Difference]: Without dead ends: 8000 [2023-03-30 23:35:45,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 803 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=2133, Unknown=0, NotChecked=0, Total=2756 [2023-03-30 23:35:45,497 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5810 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 6464 mSolverCounterSat, 3088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5827 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 9552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3088 IncrementalHoareTripleChecker+Valid, 6464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:45,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5827 Valid, 132 Invalid, 9552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3088 Valid, 6464 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-03-30 23:35:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2023-03-30 23:35:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 7630. [2023-03-30 23:35:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7630 states, 7445 states have (on average 1.2380120886501007) internal successors, (9217), 7516 states have internal predecessors, (9217), 46 states have call successors, (46), 46 states have call predecessors, (46), 138 states have return successors, (729), 67 states have call predecessors, (729), 45 states have call successors, (729) [2023-03-30 23:35:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7630 states to 7630 states and 9992 transitions. [2023-03-30 23:35:45,721 INFO L78 Accepts]: Start accepts. Automaton has 7630 states and 9992 transitions. Word has length 382 [2023-03-30 23:35:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:45,722 INFO L495 AbstractCegarLoop]: Abstraction has 7630 states and 9992 transitions. [2023-03-30 23:35:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.642857142857146) internal successors, (527), 12 states have internal predecessors, (527), 6 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-03-30 23:35:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7630 states and 9992 transitions. [2023-03-30 23:35:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-03-30 23:35:45,732 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:45,732 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:35:45,741 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 23:35:45,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:45,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:45,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -242208350, now seen corresponding path program 1 times [2023-03-30 23:35:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:45,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122856748] [2023-03-30 23:35:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:45,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-03-30 23:35:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-03-30 23:35:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 96 proven. 3 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-03-30 23:35:46,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:46,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122856748] [2023-03-30 23:35:46,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122856748] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:46,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508676654] [2023-03-30 23:35:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:46,458 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 23:35:46,460 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 23:35:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:46,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:35:46,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:35:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-03-30 23:35:46,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:35:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508676654] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:35:46,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:35:46,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-03-30 23:35:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423141073] [2023-03-30 23:35:46,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:35:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:35:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:35:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:35:46,687 INFO L87 Difference]: Start difference. First operand 7630 states and 9992 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 23:35:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:47,940 INFO L93 Difference]: Finished difference Result 15254 states and 19978 transitions. [2023-03-30 23:35:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:35:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 472 [2023-03-30 23:35:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:47,970 INFO L225 Difference]: With dead ends: 15254 [2023-03-30 23:35:47,970 INFO L226 Difference]: Without dead ends: 7630 [2023-03-30 23:35:47,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:35:47,985 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 339 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:47,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 499 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-30 23:35:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2023-03-30 23:35:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7289. [2023-03-30 23:35:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7110 states have (on average 1.189170182841069) internal successors, (8455), 7179 states have internal predecessors, (8455), 44 states have call successors, (44), 44 states have call predecessors, (44), 134 states have return successors, (554), 65 states have call predecessors, (554), 43 states have call successors, (554) [2023-03-30 23:35:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 9053 transitions. [2023-03-30 23:35:48,152 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 9053 transitions. Word has length 472 [2023-03-30 23:35:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:48,153 INFO L495 AbstractCegarLoop]: Abstraction has 7289 states and 9053 transitions. [2023-03-30 23:35:48,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 23:35:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 9053 transitions. [2023-03-30 23:35:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-03-30 23:35:48,179 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:48,179 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:35:48,189 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 23:35:48,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:48,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:48,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -130557122, now seen corresponding path program 1 times [2023-03-30 23:35:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:48,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681907217] [2023-03-30 23:35:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:48,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:48,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:48,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-03-30 23:35:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-03-30 23:35:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2023-03-30 23:35:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:35:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 559 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-03-30 23:35:49,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681907217] [2023-03-30 23:35:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681907217] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586544842] [2023-03-30 23:35:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:49,588 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 23:35:49,591 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 23:35:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:49,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:35:49,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:35:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 562 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-03-30 23:35:50,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:35:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 562 proven. 2 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-03-30 23:35:51,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586544842] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:35:51,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:35:51,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:35:51,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808729613] [2023-03-30 23:35:51,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:35:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:35:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:35:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:35:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:35:51,221 INFO L87 Difference]: Start difference. First operand 7289 states and 9053 transitions. Second operand has 12 states, 12 states have (on average 99.25) internal successors, (1191), 10 states have internal predecessors, (1191), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:35:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:35:56,612 INFO L93 Difference]: Finished difference Result 18049 states and 22328 transitions. [2023-03-30 23:35:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-03-30 23:35:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 99.25) internal successors, (1191), 10 states have internal predecessors, (1191), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 777 [2023-03-30 23:35:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:35:56,632 INFO L225 Difference]: With dead ends: 18049 [2023-03-30 23:35:56,632 INFO L226 Difference]: Without dead ends: 7950 [2023-03-30 23:35:56,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1637 GetRequests, 1592 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2023-03-30 23:35:56,650 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2406 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7711 mSolverCounterSat, 1296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2415 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 9007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1296 IncrementalHoareTripleChecker+Valid, 7711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-03-30 23:35:56,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2415 Valid, 194 Invalid, 9007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1296 Valid, 7711 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-03-30 23:35:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2023-03-30 23:35:56,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7579. [2023-03-30 23:35:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7579 states, 7414 states have (on average 1.0396547073104936) internal successors, (7708), 7476 states have internal predecessors, (7708), 46 states have call successors, (46), 46 states have call predecessors, (46), 118 states have return successors, (289), 56 states have call predecessors, (289), 45 states have call successors, (289) [2023-03-30 23:35:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7579 states to 7579 states and 8043 transitions. [2023-03-30 23:35:56,816 INFO L78 Accepts]: Start accepts. Automaton has 7579 states and 8043 transitions. Word has length 777 [2023-03-30 23:35:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:35:56,817 INFO L495 AbstractCegarLoop]: Abstraction has 7579 states and 8043 transitions. [2023-03-30 23:35:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.25) internal successors, (1191), 10 states have internal predecessors, (1191), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2023-03-30 23:35:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7579 states and 8043 transitions. [2023-03-30 23:35:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2023-03-30 23:35:56,875 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:35:56,876 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, 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, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:35:56,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:35:57,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:57,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:35:57,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:35:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -548508790, now seen corresponding path program 1 times [2023-03-30 23:35:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:35:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996952508] [2023-03-30 23:35:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:57,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:35:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:58,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:35:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:58,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:35:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:58,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-03-30 23:35:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:58,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2023-03-30 23:35:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-03-30 23:35:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2023-03-30 23:35:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2023-03-30 23:35:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 937 [2023-03-30 23:35:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:35:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2860 backedges. 613 proven. 262 refuted. 0 times theorem prover too weak. 1985 trivial. 0 not checked. [2023-03-30 23:35:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:35:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996952508] [2023-03-30 23:35:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996952508] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:35:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303931179] [2023-03-30 23:35:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:35:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:35:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:35:59,562 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 23:35:59,564 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 23:35:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:35:59,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-30 23:35:59,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:36:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2860 backedges. 954 proven. 0 refuted. 0 times theorem prover too weak. 1906 trivial. 0 not checked. [2023-03-30 23:36:00,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:36:00,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303931179] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:36:00,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:36:00,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-03-30 23:36:00,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637288953] [2023-03-30 23:36:00,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:36:00,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:36:00,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:36:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:36:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:36:00,311 INFO L87 Difference]: Start difference. First operand 7579 states and 8043 transitions. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 4 states have internal predecessors, (557), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 23:36:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:36:01,299 INFO L93 Difference]: Finished difference Result 15852 states and 16813 transitions. [2023-03-30 23:36:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:36:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 4 states have internal predecessors, (557), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 1272 [2023-03-30 23:36:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:36:01,317 INFO L225 Difference]: With dead ends: 15852 [2023-03-30 23:36:01,318 INFO L226 Difference]: Without dead ends: 8279 [2023-03-30 23:36:01,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1288 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:36:01,330 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 524 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:36:01,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 69 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-30 23:36:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2023-03-30 23:36:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 8259. [2023-03-30 23:36:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8259 states, 8083 states have (on average 1.0374860819002845) internal successors, (8386), 8148 states have internal predecessors, (8386), 50 states have call successors, (50), 50 states have call predecessors, (50), 125 states have return successors, (304), 60 states have call predecessors, (304), 49 states have call successors, (304) [2023-03-30 23:36:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 8740 transitions. [2023-03-30 23:36:01,465 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 8740 transitions. Word has length 1272 [2023-03-30 23:36:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:36:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 8259 states and 8740 transitions. [2023-03-30 23:36:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 4 states have internal predecessors, (557), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-30 23:36:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 8740 transitions. [2023-03-30 23:36:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1520 [2023-03-30 23:36:01,495 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:36:01,496 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:36:01,506 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 23:36:01,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:36:01,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:36:01,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:36:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash 157008596, now seen corresponding path program 1 times [2023-03-30 23:36:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:36:01,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228079271] [2023-03-30 23:36:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:36:01,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:36:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:03,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:36:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:36:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:03,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2023-03-30 23:36:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2023-03-30 23:36:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-03-30 23:36:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 717 [2023-03-30 23:36:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 859 [2023-03-30 23:36:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 969 [2023-03-30 23:36:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1184 [2023-03-30 23:36:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:36:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:36:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 763 proven. 263 refuted. 0 times theorem prover too weak. 3039 trivial. 0 not checked. [2023-03-30 23:36:04,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:36:04,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228079271] [2023-03-30 23:36:04,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228079271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:36:04,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386351635] [2023-03-30 23:36:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:36:04,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:36:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:36:04,517 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 23:36:04,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process