/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_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:08:40,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:08:40,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:08:40,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:08:40,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:08:40,176 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:08:40,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:08:40,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:08:40,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:08:40,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:08:40,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:08:40,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:08:40,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:08:40,178 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:08:40,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:08:40,179 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:08:40,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:08:40,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:08:40,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:08:40,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:08:40,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:08:40,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:08:40,182 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:08:40,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:08:40,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:08:40,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:08:40,391 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:08:40,391 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:08:40,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label04.c [2023-04-01 23:08:41,506 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:08:41,812 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:08:41,812 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label04.c [2023-04-01 23:08:41,827 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e6e52db/e3ea6cd75dc54bcbbef5ee0febaa2dbf/FLAG77bf7a954 [2023-04-01 23:08:41,840 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e6e52db/e3ea6cd75dc54bcbbef5ee0febaa2dbf [2023-04-01 23:08:41,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:08:41,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:08:41,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:08:41,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:08:41,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:08:41,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:08:41" (1/1) ... [2023-04-01 23:08:41,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0963fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:41, skipping insertion in model container [2023-04-01 23:08:41,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:08:41" (1/1) ... [2023-04-01 23:08:41,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:08:41,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:08:42,045 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_label04.c[3124,3137] [2023-04-01 23:08:42,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:08:42,429 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:08:42,451 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_label04.c[3124,3137] [2023-04-01 23:08:42,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:08:42,595 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:08:42,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42 WrapperNode [2023-04-01 23:08:42,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:08:42,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:08:42,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:08:42,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:08:42,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,737 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:08:42,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:08:42,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:08:42,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:08:42,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (1/1) ... [2023-04-01 23:08:42,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:08:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:42,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:08:42,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:08:42,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:08:42,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:08:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:08:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:08:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:08:42,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:08:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:08:42,830 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:08:42,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:08:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:08:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:08:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:08:42,917 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:08:42,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:08:44,765 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:08:44,775 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:08:44,775 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:08:44,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:08:44 BoogieIcfgContainer [2023-04-01 23:08:44,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:08:44,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:08:44,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:08:44,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:08:44,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:08:41" (1/3) ... [2023-04-01 23:08:44,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d3b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:08:44, skipping insertion in model container [2023-04-01 23:08:44,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:08:42" (2/3) ... [2023-04-01 23:08:44,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d3b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:08:44, skipping insertion in model container [2023-04-01 23:08:44,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:08:44" (3/3) ... [2023-04-01 23:08:44,784 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label04.c [2023-04-01 23:08:44,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:08:44,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:08:44,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:08:44,850 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;@36a0bc2f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:08:44,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:08:44,855 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) [2023-04-01 23:08:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 23:08:44,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:44,862 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] [2023-04-01 23:08:44,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:44,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 269511889, now seen corresponding path program 1 times [2023-04-01 23:08:44,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:44,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108323265] [2023-04-01 23:08:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:45,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:45,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:45,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108323265] [2023-04-01 23:08:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108323265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:08:45,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:08:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 23:08:45,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188851427] [2023-04-01 23:08:45,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:08:45,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:08:45,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:08:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:08:45,287 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 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:08:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:48,567 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2023-04-01 23:08:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 23:08:48,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 34 [2023-04-01 23:08:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:48,584 INFO L225 Difference]: With dead ends: 1515 [2023-04-01 23:08:48,585 INFO L226 Difference]: Without dead ends: 1038 [2023-04-01 23:08:48,593 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 [2023-04-01 23:08:48,596 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1758 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:48,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1758 Valid, 38 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 23:08:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-04-01 23:08:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2023-04-01 23:08:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1010 states have (on average 1.5831683168316832) internal successors, (1599), 1013 states have internal predecessors, (1599), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2023-04-01 23:08:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2023-04-01 23:08:48,717 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 34 [2023-04-01 23:08:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:48,718 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2023-04-01 23:08:48,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:08:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2023-04-01 23:08:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 23:08:48,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:48,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:48,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:08:48,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:48,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:48,725 INFO L85 PathProgramCache]: Analyzing trace with hash -673375245, now seen corresponding path program 1 times [2023-04-01 23:08:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016372104] [2023-04-01 23:08:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:48,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:49,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:49,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:49,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:49,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016372104] [2023-04-01 23:08:49,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016372104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:08:49,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:08:49,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:08:49,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657146343] [2023-04-01 23:08:49,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:08:49,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:08:49,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:08:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:08:49,301 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-04-01 23:08:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:52,305 INFO L93 Difference]: Finished difference Result 3141 states and 5051 transitions. [2023-04-01 23:08:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:08:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 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 109 [2023-04-01 23:08:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:52,315 INFO L225 Difference]: With dead ends: 3141 [2023-04-01 23:08:52,315 INFO L226 Difference]: Without dead ends: 2116 [2023-04-01 23:08:52,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:08:52,324 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1747 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:52,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1747 Valid, 65 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 23:08:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2023-04-01 23:08:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2087. [2023-04-01 23:08:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2035 states have (on average 1.5051597051597052) internal successors, (3063), 2050 states have internal predecessors, (3063), 14 states have call successors, (14), 14 states have call predecessors, (14), 37 states have return successors, (103), 22 states have call predecessors, (103), 13 states have call successors, (103) [2023-04-01 23:08:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3180 transitions. [2023-04-01 23:08:52,434 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3180 transitions. Word has length 109 [2023-04-01 23:08:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:52,435 INFO L495 AbstractCegarLoop]: Abstraction has 2087 states and 3180 transitions. [2023-04-01 23:08:52,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 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) [2023-04-01 23:08:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3180 transitions. [2023-04-01 23:08:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 23:08:52,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:52,443 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:08:52,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:52,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1276539435, now seen corresponding path program 1 times [2023-04-01 23:08:52,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:52,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920700156] [2023-04-01 23:08:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:52,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:52,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:52,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:52,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920700156] [2023-04-01 23:08:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920700156] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:08:52,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:08:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 23:08:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836126363] [2023-04-01 23:08:52,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:08:52,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 23:08:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 23:08:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:08:52,722 INFO L87 Difference]: Start difference. First operand 2087 states and 3180 transitions. Second operand has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 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) [2023-04-01 23:08:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:54,852 INFO L93 Difference]: Finished difference Result 4913 states and 7446 transitions. [2023-04-01 23:08:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:08:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 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 113 [2023-04-01 23:08:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:54,870 INFO L225 Difference]: With dead ends: 4913 [2023-04-01 23:08:54,871 INFO L226 Difference]: Without dead ends: 2832 [2023-04-01 23:08:54,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:08:54,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2276 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2276 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:54,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2276 Valid, 71 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 23:08:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2023-04-01 23:08:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2800. [2023-04-01 23:08:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2723 states have (on average 1.3334557473374955) internal successors, (3631), 2750 states have internal predecessors, (3631), 18 states have call successors, (18), 18 states have call predecessors, (18), 58 states have return successors, (167), 31 states have call predecessors, (167), 17 states have call successors, (167) [2023-04-01 23:08:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 3816 transitions. [2023-04-01 23:08:54,993 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 3816 transitions. Word has length 113 [2023-04-01 23:08:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:54,994 INFO L495 AbstractCegarLoop]: Abstraction has 2800 states and 3816 transitions. [2023-04-01 23:08:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 5 states have internal predecessors, (107), 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) [2023-04-01 23:08:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 3816 transitions. [2023-04-01 23:08:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 23:08:55,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:55,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:08:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 23:08:55,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:55,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1752222509, now seen corresponding path program 1 times [2023-04-01 23:08:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:55,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489154732] [2023-04-01 23:08:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:55,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:55,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 23:08:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489154732] [2023-04-01 23:08:55,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489154732] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919645370] [2023-04-01 23:08:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:55,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:55,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:55,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:08:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:55,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:08:55,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:55,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:08:55,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919645370] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:08:55,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:08:55,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-04-01 23:08:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674281021] [2023-04-01 23:08:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:08:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:08:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:08:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:08:55,490 INFO L87 Difference]: Start difference. First operand 2800 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:08:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:08:56,884 INFO L93 Difference]: Finished difference Result 8340 states and 11576 transitions. [2023-04-01 23:08:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:08:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 125 [2023-04-01 23:08:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:08:56,910 INFO L225 Difference]: With dead ends: 8340 [2023-04-01 23:08:56,910 INFO L226 Difference]: Without dead ends: 5546 [2023-04-01 23:08:56,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:08:56,922 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 335 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:08:56,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 244 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 23:08:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2023-04-01 23:08:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5546. [2023-04-01 23:08:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5414 states have (on average 1.22201699298116) internal successors, (6616), 5460 states have internal predecessors, (6616), 34 states have call successors, (34), 34 states have call predecessors, (34), 97 states have return successors, (358), 51 states have call predecessors, (358), 33 states have call successors, (358) [2023-04-01 23:08:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 7008 transitions. [2023-04-01 23:08:57,061 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 7008 transitions. Word has length 125 [2023-04-01 23:08:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:08:57,062 INFO L495 AbstractCegarLoop]: Abstraction has 5546 states and 7008 transitions. [2023-04-01 23:08:57,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 23:08:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 7008 transitions. [2023-04-01 23:08:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-01 23:08:57,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:08:57,065 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:08:57,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 23:08:57,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:57,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:08:57,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:08:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -129180383, now seen corresponding path program 1 times [2023-04-01 23:08:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:08:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108928708] [2023-04-01 23:08:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:57,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:08:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:57,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:08:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:57,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:08:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:57,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-04-01 23:08:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 23:08:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:08:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108928708] [2023-04-01 23:08:57,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108928708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:08:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715481448] [2023-04-01 23:08:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:08:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:08:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:08:57,623 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:08:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:08:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:08:57,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:08:57,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:08:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:57,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:08:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:08:58,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715481448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:08:58,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:08:58,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:08:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869226396] [2023-04-01 23:08:58,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:08:58,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:08:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:08:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:08:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:08:58,205 INFO L87 Difference]: Start difference. First operand 5546 states and 7008 transitions. Second operand has 12 states, 12 states have (on average 30.416666666666668) internal successors, (365), 10 states have internal predecessors, (365), 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) [2023-04-01 23:09:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:00,509 INFO L93 Difference]: Finished difference Result 13204 states and 17333 transitions. [2023-04-01 23:09:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 23:09:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 30.416666666666668) internal successors, (365), 10 states have internal predecessors, (365), 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 208 [2023-04-01 23:09:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:00,547 INFO L225 Difference]: With dead ends: 13204 [2023-04-01 23:09:00,548 INFO L226 Difference]: Without dead ends: 8001 [2023-04-01 23:09:00,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-04-01 23:09:00,558 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2506 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:00,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2506 Valid, 55 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 23:09:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2023-04-01 23:09:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6276. [2023-04-01 23:09:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 6111 states have (on average 1.212731140566192) internal successors, (7411), 6176 states have internal predecessors, (7411), 38 states have call successors, (38), 38 states have call predecessors, (38), 126 states have return successors, (477), 61 states have call predecessors, (477), 37 states have call successors, (477) [2023-04-01 23:09:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 7926 transitions. [2023-04-01 23:09:00,736 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 7926 transitions. Word has length 208 [2023-04-01 23:09:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:00,737 INFO L495 AbstractCegarLoop]: Abstraction has 6276 states and 7926 transitions. [2023-04-01 23:09:00,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.416666666666668) internal successors, (365), 10 states have internal predecessors, (365), 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) [2023-04-01 23:09:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 7926 transitions. [2023-04-01 23:09:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-04-01 23:09:00,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:00,744 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:09:00,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:00,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:00,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash -750869827, now seen corresponding path program 1 times [2023-04-01 23:09:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550294832] [2023-04-01 23:09:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:01,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:01,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:01,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:09:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:09:01,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550294832] [2023-04-01 23:09:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550294832] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074175047] [2023-04-01 23:09:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:01,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:01,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:01,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:01,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:09:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:01,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:09:01,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:09:01,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:09:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074175047] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:02,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:09:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653422794] [2023-04-01 23:09:02,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:02,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:09:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:09:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:09:02,117 INFO L87 Difference]: Start difference. First operand 6276 states and 7926 transitions. Second operand has 12 states, 12 states have (on average 51.75) internal successors, (621), 10 states have internal predecessors, (621), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:09:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:06,453 INFO L93 Difference]: Finished difference Result 21789 states and 29412 transitions. [2023-04-01 23:09:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 23:09:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 51.75) internal successors, (621), 10 states have internal predecessors, (621), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 398 [2023-04-01 23:09:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:06,506 INFO L225 Difference]: With dead ends: 21789 [2023-04-01 23:09:06,507 INFO L226 Difference]: Without dead ends: 15519 [2023-04-01 23:09:06,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 799 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2023-04-01 23:09:06,519 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3245 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4699 mSolverCounterSat, 1785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3245 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1785 IncrementalHoareTripleChecker+Valid, 4699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:06,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3245 Valid, 118 Invalid, 6484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1785 Valid, 4699 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 23:09:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15519 states. [2023-04-01 23:09:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15519 to 15164. [2023-04-01 23:09:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15164 states, 14836 states have (on average 1.2037611215961175) internal successors, (17859), 14952 states have internal predecessors, (17859), 90 states have call successors, (90), 90 states have call predecessors, (90), 237 states have return successors, (1625), 121 states have call predecessors, (1625), 89 states have call successors, (1625) [2023-04-01 23:09:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15164 states to 15164 states and 19574 transitions. [2023-04-01 23:09:06,868 INFO L78 Accepts]: Start accepts. Automaton has 15164 states and 19574 transitions. Word has length 398 [2023-04-01 23:09:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:06,868 INFO L495 AbstractCegarLoop]: Abstraction has 15164 states and 19574 transitions. [2023-04-01 23:09:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.75) internal successors, (621), 10 states have internal predecessors, (621), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 23:09:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 15164 states and 19574 transitions. [2023-04-01 23:09:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-04-01 23:09:06,879 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:06,880 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:09:06,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:07,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:07,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:07,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:07,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1442204455, now seen corresponding path program 1 times [2023-04-01 23:09:07,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:07,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946755744] [2023-04-01 23:09:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:07,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:09:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 327 [2023-04-01 23:09:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 294 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 23:09:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946755744] [2023-04-01 23:09:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946755744] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419177290] [2023-04-01 23:09:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:07,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:07,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:07,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:07,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:09:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:07,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:09:07,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-01 23:09:08,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 296 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-01 23:09:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419177290] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:08,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:08,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:09:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925405634] [2023-04-01 23:09:08,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:08,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:09:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:09:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:09:08,469 INFO L87 Difference]: Start difference. First operand 15164 states and 19574 transitions. Second operand has 11 states, 11 states have (on average 64.18181818181819) internal successors, (706), 9 states have internal predecessors, (706), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:09:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:12,135 INFO L93 Difference]: Finished difference Result 31280 states and 41856 transitions. [2023-04-01 23:09:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 23:09:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 64.18181818181819) internal successors, (706), 9 states have internal predecessors, (706), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 497 [2023-04-01 23:09:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:12,205 INFO L225 Difference]: With dead ends: 31280 [2023-04-01 23:09:12,206 INFO L226 Difference]: Without dead ends: 16122 [2023-04-01 23:09:12,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 1004 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-04-01 23:09:12,238 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1554 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 5078 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 5078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:12,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1557 Valid, 137 Invalid, 5629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 5078 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 23:09:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16122 states. [2023-04-01 23:09:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16122 to 15216. [2023-04-01 23:09:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15216 states, 14866 states have (on average 1.1538409794161173) internal successors, (17153), 14997 states have internal predecessors, (17153), 91 states have call successors, (91), 90 states have call predecessors, (91), 258 states have return successors, (1381), 128 states have call predecessors, (1381), 90 states have call successors, (1381) [2023-04-01 23:09:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15216 states to 15216 states and 18625 transitions. [2023-04-01 23:09:12,578 INFO L78 Accepts]: Start accepts. Automaton has 15216 states and 18625 transitions. Word has length 497 [2023-04-01 23:09:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:12,579 INFO L495 AbstractCegarLoop]: Abstraction has 15216 states and 18625 transitions. [2023-04-01 23:09:12,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 64.18181818181819) internal successors, (706), 9 states have internal predecessors, (706), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 23:09:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15216 states and 18625 transitions. [2023-04-01 23:09:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-04-01 23:09:12,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:12,592 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:09:12,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:12,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:12,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:12,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1793841468, now seen corresponding path program 1 times [2023-04-01 23:09:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:12,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532887469] [2023-04-01 23:09:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:12,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:09:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2023-04-01 23:09:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-04-01 23:09:13,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532887469] [2023-04-01 23:09:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532887469] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904449702] [2023-04-01 23:09:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:13,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:13,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:13,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:13,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:09:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:13,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:09:13,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-04-01 23:09:13,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:09:13,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904449702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:09:13,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:09:13,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:09:13,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159622716] [2023-04-01 23:09:13,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:09:13,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:09:13,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:09:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:09:13,527 INFO L87 Difference]: Start difference. First operand 15216 states and 18625 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:09:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:14,660 INFO L93 Difference]: Finished difference Result 29746 states and 36517 transitions. [2023-04-01 23:09:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:09:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 522 [2023-04-01 23:09:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:14,703 INFO L225 Difference]: With dead ends: 29746 [2023-04-01 23:09:14,703 INFO L226 Difference]: Without dead ends: 15216 [2023-04-01 23:09:14,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:09:14,733 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 343 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 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, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:14,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 499 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 23:09:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15216 states. [2023-04-01 23:09:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15216 to 15216. [2023-04-01 23:09:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15216 states, 14866 states have (on average 1.122897887797659) internal successors, (16693), 14997 states have internal predecessors, (16693), 91 states have call successors, (91), 90 states have call predecessors, (91), 258 states have return successors, (1127), 128 states have call predecessors, (1127), 90 states have call successors, (1127) [2023-04-01 23:09:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15216 states to 15216 states and 17911 transitions. [2023-04-01 23:09:15,117 INFO L78 Accepts]: Start accepts. Automaton has 15216 states and 17911 transitions. Word has length 522 [2023-04-01 23:09:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:15,118 INFO L495 AbstractCegarLoop]: Abstraction has 15216 states and 17911 transitions. [2023-04-01 23:09:15,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:09:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 15216 states and 17911 transitions. [2023-04-01 23:09:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2023-04-01 23:09:15,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:15,147 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:09:15,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:15,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:15,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:15,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -96761496, now seen corresponding path program 1 times [2023-04-01 23:09:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457997323] [2023-04-01 23:09:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:15,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:15,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:09:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:15,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2023-04-01 23:09:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 473 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-04-01 23:09:16,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457997323] [2023-04-01 23:09:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457997323] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691680421] [2023-04-01 23:09:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:16,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:16,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:16,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:09:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:16,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:09:16,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 23:09:16,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-04-01 23:09:17,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691680421] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:17,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:17,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 23:09:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023883069] [2023-04-01 23:09:17,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 23:09:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 23:09:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 23:09:17,199 INFO L87 Difference]: Start difference. First operand 15216 states and 17911 transitions. Second operand has 12 states, 12 states have (on average 72.75) internal successors, (873), 10 states have internal predecessors, (873), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:09:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:21,262 INFO L93 Difference]: Finished difference Result 38246 states and 44772 transitions. [2023-04-01 23:09:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 23:09:21,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 72.75) internal successors, (873), 10 states have internal predecessors, (873), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 676 [2023-04-01 23:09:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:21,306 INFO L225 Difference]: With dead ends: 38246 [2023-04-01 23:09:21,306 INFO L226 Difference]: Without dead ends: 18468 [2023-04-01 23:09:21,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1390 GetRequests, 1365 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-04-01 23:09:21,337 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2069 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 5711 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 6908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 5711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:21,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2076 Valid, 131 Invalid, 6908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1197 Valid, 5711 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 23:09:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18468 states. [2023-04-01 23:09:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18468 to 14709. [2023-04-01 23:09:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14709 states, 14435 states have (on average 1.0329754069968826) internal successors, (14911), 14519 states have internal predecessors, (14911), 88 states have call successors, (88), 88 states have call predecessors, (88), 185 states have return successors, (511), 101 states have call predecessors, (511), 87 states have call successors, (511) [2023-04-01 23:09:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14709 states to 14709 states and 15510 transitions. [2023-04-01 23:09:21,582 INFO L78 Accepts]: Start accepts. Automaton has 14709 states and 15510 transitions. Word has length 676 [2023-04-01 23:09:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:21,584 INFO L495 AbstractCegarLoop]: Abstraction has 14709 states and 15510 transitions. [2023-04-01 23:09:21,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 72.75) internal successors, (873), 10 states have internal predecessors, (873), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 23:09:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14709 states and 15510 transitions. [2023-04-01 23:09:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1054 [2023-04-01 23:09:21,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:21,611 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:09:21,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:21,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:21,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1738681541, now seen corresponding path program 1 times [2023-04-01 23:09:21,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:21,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182346122] [2023-04-01 23:09:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:23,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-04-01 23:09:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2023-04-01 23:09:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 725 [2023-04-01 23:09:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:24,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 940 [2023-04-01 23:09:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 594 proven. 298 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2023-04-01 23:09:24,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182346122] [2023-04-01 23:09:24,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182346122] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:24,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557019550] [2023-04-01 23:09:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:24,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:24,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:24,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:09:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:24,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:09:24,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1747 backedges. 769 proven. 0 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2023-04-01 23:09:25,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:09:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557019550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:09:25,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:09:25,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 23:09:25,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926060102] [2023-04-01 23:09:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:09:25,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 23:09:25,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 23:09:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:09:25,294 INFO L87 Difference]: Start difference. First operand 14709 states and 15510 transitions. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 4 states have internal predecessors, (525), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:09:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:26,552 INFO L93 Difference]: Finished difference Result 29763 states and 31438 transitions. [2023-04-01 23:09:26,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 23:09:26,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 4 states have internal predecessors, (525), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 1053 [2023-04-01 23:09:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:26,590 INFO L225 Difference]: With dead ends: 29763 [2023-04-01 23:09:26,590 INFO L226 Difference]: Without dead ends: 15734 [2023-04-01 23:09:26,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 1061 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:09:26,607 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 524 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:26,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 84 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 23:09:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15734 states. [2023-04-01 23:09:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15734 to 15391. [2023-04-01 23:09:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15391 states, 15105 states have (on average 1.0325057927838464) internal successors, (15596), 15193 states have internal predecessors, (15596), 92 states have call successors, (92), 92 states have call predecessors, (92), 193 states have return successors, (550), 105 states have call predecessors, (550), 91 states have call successors, (550) [2023-04-01 23:09:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15391 states to 15391 states and 16238 transitions. [2023-04-01 23:09:26,841 INFO L78 Accepts]: Start accepts. Automaton has 15391 states and 16238 transitions. Word has length 1053 [2023-04-01 23:09:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:26,841 INFO L495 AbstractCegarLoop]: Abstraction has 15391 states and 16238 transitions. [2023-04-01 23:09:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 4 states have internal predecessors, (525), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 23:09:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15391 states and 16238 transitions. [2023-04-01 23:09:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1293 [2023-04-01 23:09:26,874 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:26,874 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:09:26,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:27,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:27,081 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:27,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 947711201, now seen corresponding path program 1 times [2023-04-01 23:09:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031406721] [2023-04-01 23:09:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:09:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2023-04-01 23:09:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 691 [2023-04-01 23:09:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 964 [2023-04-01 23:09:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1179 [2023-04-01 23:09:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2749 backedges. 414 proven. 736 refuted. 0 times theorem prover too weak. 1599 trivial. 0 not checked. [2023-04-01 23:09:29,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031406721] [2023-04-01 23:09:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031406721] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10832825] [2023-04-01 23:09:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:29,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:29,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:29,912 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:29,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:09:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:30,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 23:09:30,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2749 backedges. 1533 proven. 2 refuted. 0 times theorem prover too weak. 1214 trivial. 0 not checked. [2023-04-01 23:09:30,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2749 backedges. 181 proven. 1450 refuted. 0 times theorem prover too weak. 1118 trivial. 0 not checked. [2023-04-01 23:09:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10832825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:34,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:34,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:09:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083276573] [2023-04-01 23:09:34,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:34,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:09:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:34,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:09:34,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:09:34,344 INFO L87 Difference]: Start difference. First operand 15391 states and 16238 transitions. Second operand has 14 states, 14 states have (on average 93.21428571428571) internal successors, (1305), 12 states have internal predecessors, (1305), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:09:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:40,246 INFO L93 Difference]: Finished difference Result 36548 states and 38660 transitions. [2023-04-01 23:09:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 23:09:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 93.21428571428571) internal successors, (1305), 12 states have internal predecessors, (1305), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 1292 [2023-04-01 23:09:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:40,296 INFO L225 Difference]: With dead ends: 36548 [2023-04-01 23:09:40,296 INFO L226 Difference]: Without dead ends: 21500 [2023-04-01 23:09:40,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2670 GetRequests, 2623 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=1890, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 23:09:40,314 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6741 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 6262 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6743 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 6262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:40,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6743 Valid, 180 Invalid, 6688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 6262 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 23:09:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21500 states. [2023-04-01 23:09:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21500 to 18800. [2023-04-01 23:09:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18456 states have (on average 1.0294755093194625) internal successors, (19000), 18559 states have internal predecessors, (19000), 112 states have call successors, (112), 112 states have call predecessors, (112), 231 states have return successors, (644), 128 states have call predecessors, (644), 111 states have call successors, (644) [2023-04-01 23:09:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 19756 transitions. [2023-04-01 23:09:40,619 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 19756 transitions. Word has length 1292 [2023-04-01 23:09:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:40,619 INFO L495 AbstractCegarLoop]: Abstraction has 18800 states and 19756 transitions. [2023-04-01 23:09:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.21428571428571) internal successors, (1305), 12 states have internal predecessors, (1305), 6 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-04-01 23:09:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 19756 transitions. [2023-04-01 23:09:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1508 [2023-04-01 23:09:40,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:40,659 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:09:40,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 23:09:40,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 23:09:40,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:40,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1300678814, now seen corresponding path program 1 times [2023-04-01 23:09:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228202414] [2023-04-01 23:09:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:40,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:09:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:09:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:09:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:42,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2023-04-01 23:09:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1067 [2023-04-01 23:09:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:43,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1179 [2023-04-01 23:09:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:43,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1394 [2023-04-01 23:09:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4252 backedges. 1050 proven. 419 refuted. 0 times theorem prover too weak. 2783 trivial. 0 not checked. [2023-04-01 23:09:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228202414] [2023-04-01 23:09:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228202414] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390140088] [2023-04-01 23:09:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:43,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:43,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:43,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:43,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:09:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:43,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:09:43,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4252 backedges. 2889 proven. 2 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2023-04-01 23:09:44,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4252 backedges. 1057 proven. 410 refuted. 0 times theorem prover too weak. 2785 trivial. 0 not checked. [2023-04-01 23:09:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390140088] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:48,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:48,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 23:09:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394020581] [2023-04-01 23:09:48,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:48,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 23:09:48,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 23:09:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:09:48,486 INFO L87 Difference]: Start difference. First operand 18800 states and 19756 transitions. Second operand has 14 states, 14 states have (on average 91.85714285714286) internal successors, (1286), 12 states have internal predecessors, (1286), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 23:09:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:09:53,940 INFO L93 Difference]: Finished difference Result 37596 states and 39513 transitions. [2023-04-01 23:09:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 23:09:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 91.85714285714286) internal successors, (1286), 12 states have internal predecessors, (1286), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 1507 [2023-04-01 23:09:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:09:53,973 INFO L225 Difference]: With dead ends: 37596 [2023-04-01 23:09:53,973 INFO L226 Difference]: Without dead ends: 19141 [2023-04-01 23:09:53,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3088 GetRequests, 3049 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 23:09:53,987 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2971 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 9679 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2972 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 10047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 9679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 23:09:53,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2972 Valid, 249 Invalid, 10047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 9679 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 23:09:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19141 states. [2023-04-01 23:09:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19141 to 18463. [2023-04-01 23:09:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18463 states, 18123 states have (on average 1.0290790707940187) internal successors, (18650), 18226 states have internal predecessors, (18650), 110 states have call successors, (110), 110 states have call predecessors, (110), 229 states have return successors, (625), 126 states have call predecessors, (625), 109 states have call successors, (625) [2023-04-01 23:09:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18463 states to 18463 states and 19385 transitions. [2023-04-01 23:09:54,269 INFO L78 Accepts]: Start accepts. Automaton has 18463 states and 19385 transitions. Word has length 1507 [2023-04-01 23:09:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:09:54,270 INFO L495 AbstractCegarLoop]: Abstraction has 18463 states and 19385 transitions. [2023-04-01 23:09:54,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 91.85714285714286) internal successors, (1286), 12 states have internal predecessors, (1286), 6 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 23:09:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 18463 states and 19385 transitions. [2023-04-01 23:09:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1664 [2023-04-01 23:09:54,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:09:54,324 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:09:54,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 23:09:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:54,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:09:54,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:09:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -346960845, now seen corresponding path program 1 times [2023-04-01 23:09:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:09:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801474981] [2023-04-01 23:09:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:09:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:09:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:09:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:56,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:09:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:09:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:09:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 669 [2023-04-01 23:09:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2023-04-01 23:09:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1034 [2023-04-01 23:09:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:09:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1335 [2023-04-01 23:09:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1550 [2023-04-01 23:09:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5004 backedges. 1495 proven. 115 refuted. 0 times theorem prover too weak. 3394 trivial. 0 not checked. [2023-04-01 23:09:57,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:09:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801474981] [2023-04-01 23:09:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801474981] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:09:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680407383] [2023-04-01 23:09:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:09:57,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:09:57,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:09:57,645 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:09:57,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:09:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:09:58,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:09:58,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:09:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5004 backedges. 3267 proven. 2 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2023-04-01 23:09:58,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:09:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5004 backedges. 729 proven. 426 refuted. 0 times theorem prover too weak. 3849 trivial. 0 not checked. [2023-04-01 23:09:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680407383] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:09:59,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:09:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 23:09:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158185094] [2023-04-01 23:09:59,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:09:59,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:09:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:09:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:09:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:09:59,165 INFO L87 Difference]: Start difference. First operand 18463 states and 19385 transitions. Second operand has 15 states, 15 states have (on average 71.2) internal successors, (1068), 13 states have internal predecessors, (1068), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-04-01 23:10:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:10:07,732 INFO L93 Difference]: Finished difference Result 40988 states and 43198 transitions. [2023-04-01 23:10:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 23:10:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 71.2) internal successors, (1068), 13 states have internal predecessors, (1068), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 1663 [2023-04-01 23:10:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:10:07,766 INFO L225 Difference]: With dead ends: 40988 [2023-04-01 23:10:07,766 INFO L226 Difference]: Without dead ends: 22529 [2023-04-01 23:10:07,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3440 GetRequests, 3380 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=587, Invalid=3073, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 23:10:07,780 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 4973 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 14277 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4973 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 14774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 14277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:10:07,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4973 Valid, 368 Invalid, 14774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 14277 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-04-01 23:10:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22529 states. [2023-04-01 23:10:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22529 to 21171. [2023-04-01 23:10:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21171 states, 20793 states have (on average 1.0271726061655364) internal successors, (21358), 20902 states have internal predecessors, (21358), 126 states have call successors, (126), 126 states have call predecessors, (126), 251 states have return successors, (693), 142 states have call predecessors, (693), 125 states have call successors, (693) [2023-04-01 23:10:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21171 states to 21171 states and 22177 transitions. [2023-04-01 23:10:08,200 INFO L78 Accepts]: Start accepts. Automaton has 21171 states and 22177 transitions. Word has length 1663 [2023-04-01 23:10:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:10:08,201 INFO L495 AbstractCegarLoop]: Abstraction has 21171 states and 22177 transitions. [2023-04-01 23:10:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.2) internal successors, (1068), 13 states have internal predecessors, (1068), 7 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-04-01 23:10:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 21171 states and 22177 transitions. [2023-04-01 23:10:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1994 [2023-04-01 23:10:08,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:10:08,252 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:10:08,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:10:08,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:10:08,461 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:10:08,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:10:08,462 INFO L85 PathProgramCache]: Analyzing trace with hash 372674650, now seen corresponding path program 1 times [2023-04-01 23:10:08,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:10:08,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6697970] [2023-04-01 23:10:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:10:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:10:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:10:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:10:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:10:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:10:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:10:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2023-04-01 23:10:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 877 [2023-04-01 23:10:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1127 [2023-04-01 23:10:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:10,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1400 [2023-04-01 23:10:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:11,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1665 [2023-04-01 23:10:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1880 [2023-04-01 23:10:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 1826 proven. 114 refuted. 0 times theorem prover too weak. 5295 trivial. 0 not checked. [2023-04-01 23:10:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:10:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6697970] [2023-04-01 23:10:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6697970] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:10:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161995803] [2023-04-01 23:10:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:10:11,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:10:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:10:11,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:10:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:10:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:11,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 2498 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 23:10:11,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:10:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 2522 proven. 2 refuted. 0 times theorem prover too weak. 4711 trivial. 0 not checked. [2023-04-01 23:10:12,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:10:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 1803 proven. 87 refuted. 0 times theorem prover too weak. 5345 trivial. 0 not checked. [2023-04-01 23:10:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161995803] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:10:15,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:10:15,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2023-04-01 23:10:15,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521226647] [2023-04-01 23:10:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:10:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 23:10:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:10:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 23:10:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:10:15,462 INFO L87 Difference]: Start difference. First operand 21171 states and 22177 transitions. Second operand has 15 states, 15 states have (on average 68.2) internal successors, (1023), 13 states have internal predecessors, (1023), 7 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-04-01 23:10:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:10:22,105 INFO L93 Difference]: Finished difference Result 42340 states and 44357 transitions. [2023-04-01 23:10:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-01 23:10:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 68.2) internal successors, (1023), 13 states have internal predecessors, (1023), 7 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 1993 [2023-04-01 23:10:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:10:22,138 INFO L225 Difference]: With dead ends: 42340 [2023-04-01 23:10:22,138 INFO L226 Difference]: Without dead ends: 21514 [2023-04-01 23:10:22,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4082 GetRequests, 4032 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=2121, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 23:10:22,158 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7057 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 11246 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7065 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 11693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 11246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:10:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7065 Valid, 331 Invalid, 11693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 11246 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 23:10:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21514 states. [2023-04-01 23:10:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21514 to 21173. [2023-04-01 23:10:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21173 states, 20794 states have (on average 1.0267865730499182) internal successors, (21351), 20904 states have internal predecessors, (21351), 126 states have call successors, (126), 126 states have call predecessors, (126), 252 states have return successors, (684), 142 states have call predecessors, (684), 125 states have call successors, (684) [2023-04-01 23:10:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21173 states to 21173 states and 22161 transitions. [2023-04-01 23:10:22,500 INFO L78 Accepts]: Start accepts. Automaton has 21173 states and 22161 transitions. Word has length 1993 [2023-04-01 23:10:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:10:22,502 INFO L495 AbstractCegarLoop]: Abstraction has 21173 states and 22161 transitions. [2023-04-01 23:10:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.2) internal successors, (1023), 13 states have internal predecessors, (1023), 7 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-04-01 23:10:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 21173 states and 22161 transitions. [2023-04-01 23:10:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2075 [2023-04-01 23:10:22,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:10:22,550 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 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, 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, 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, 3, 3, 3, 3, 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] [2023-04-01 23:10:22,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:10:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:10:22,777 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:10:22,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:10:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash -834859605, now seen corresponding path program 1 times [2023-04-01 23:10:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:10:22,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237760559] [2023-04-01 23:10:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:10:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:10:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:24,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:10:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:24,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:10:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:24,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 23:10:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2023-04-01 23:10:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 599 [2023-04-01 23:10:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 794 [2023-04-01 23:10:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 877 [2023-04-01 23:10:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1127 [2023-04-01 23:10:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1400 [2023-04-01 23:10:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1471 [2023-04-01 23:10:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1725 [2023-04-01 23:10:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:10:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7248 backedges. 1465 proven. 609 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2023-04-01 23:10:25,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:10:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237760559] [2023-04-01 23:10:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237760559] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:10:25,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571760620] [2023-04-01 23:10:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:10:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:10:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:10:25,779 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:10:25,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:10:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:10:26,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 23:10:26,297 INFO L285 TraceCheckSpWp]: Computing forward predicates...