/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/Problem18_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:45:15,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:45:15,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:45:15,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 23:45:15,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 23:45:15,791 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:45:15,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:45:15,792 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:45:15,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:45:15,793 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:45:15,793 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:45:15,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:45:15,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:45:15,794 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:45:15,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:45:15,794 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:45:15,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:45:15,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:45:15,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:45:15,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:45:15,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:45:15,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:45:15,796 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:45:15,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:45:15,796 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:45:15,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:45:15,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:45:15,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:45:15,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:45:15,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:15,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:45:15,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:45:15,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:45:15,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:45:15,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:45:15,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:45:15,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:45:15,799 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:45:15,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:45:15,799 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:45:15,799 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:45:16,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:45:16,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:45:16,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:45:16,074 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:45:16,074 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:45:16,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2023-03-30 23:45:17,265 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:45:17,629 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:45:17,629 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2023-03-30 23:45:17,656 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8d06dc9b/b6dd9ce88a48485bb78661eb3189f7ce/FLAG9af6be78a [2023-03-30 23:45:17,671 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8d06dc9b/b6dd9ce88a48485bb78661eb3189f7ce [2023-03-30 23:45:17,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:45:17,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:45:17,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:17,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:45:17,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:45:17,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:17" (1/1) ... [2023-03-30 23:45:17,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69006de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:17, skipping insertion in model container [2023-03-30 23:45:17,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:45:17" (1/1) ... [2023-03-30 23:45:17,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:45:17,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:45:17,983 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/Problem18_label31.c[1896,1909] [2023-03-30 23:45:18,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:18,662 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:45:18,685 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/Problem18_label31.c[1896,1909] [2023-03-30 23:45:18,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:45:18,960 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:45:18,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18 WrapperNode [2023-03-30 23:45:18,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:45:18,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:45:18,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:45:18,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:45:18,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:18,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:45:19,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:45:19,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:45:19,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:45:19,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (1/1) ... [2023-03-30 23:45:19,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:45:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:19,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 23:45:19,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 23:45:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:45:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:45:19,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:45:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:45:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:45:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:45:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:45:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:45:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:45:19,328 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:45:19,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:45:22,200 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:45:22,219 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:45:22,220 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:45:22,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:22 BoogieIcfgContainer [2023-03-30 23:45:22,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:45:22,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:45:22,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:45:22,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:45:22,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:45:17" (1/3) ... [2023-03-30 23:45:22,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6cd223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:22, skipping insertion in model container [2023-03-30 23:45:22,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:45:18" (2/3) ... [2023-03-30 23:45:22,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6cd223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:45:22, skipping insertion in model container [2023-03-30 23:45:22,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:45:22" (3/3) ... [2023-03-30 23:45:22,232 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label31.c [2023-03-30 23:45:22,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:45:22,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:45:22,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:45:22,326 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;@5afbe923, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:45:22,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:45:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 23:45:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-30 23:45:22,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:22,342 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] [2023-03-30 23:45:22,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:22,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:22,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1146321914, now seen corresponding path program 1 times [2023-03-30 23:45:22,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:22,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460189406] [2023-03-30 23:45:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:22,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:22,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460189406] [2023-03-30 23:45:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460189406] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:45:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906066394] [2023-03-30 23:45:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:22,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:45:22,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:45:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:45:22,821 INFO L87 Difference]: Start difference. First operand has 774 states, 762 states have (on average 1.9041994750656168) internal successors, (1451), 763 states have internal predecessors, (1451), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:45:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:29,165 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2023-03-30 23:45:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:45:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 21 [2023-03-30 23:45:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:29,201 INFO L225 Difference]: With dead ends: 2984 [2023-03-30 23:45:29,201 INFO L226 Difference]: Without dead ends: 2142 [2023-03-30 23:45:29,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:45:29,214 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2947 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4992 mSolverCounterSat, 1269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2947 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 6261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1269 IncrementalHoareTripleChecker+Valid, 4992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:29,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2947 Valid, 55 Invalid, 6261 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1269 Valid, 4992 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-03-30 23:45:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2023-03-30 23:45:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2023-03-30 23:45:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2103 states have (on average 1.7622444127436996) internal successors, (3706), 2106 states have internal predecessors, (3706), 11 states have call successors, (11), 11 states have call predecessors, (11), 17 states have return successors, (36), 14 states have call predecessors, (36), 10 states have call successors, (36) [2023-03-30 23:45:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2023-03-30 23:45:29,332 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 21 [2023-03-30 23:45:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:29,332 INFO L495 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2023-03-30 23:45:29,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:45:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2023-03-30 23:45:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-30 23:45:29,336 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:29,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:45:29,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:29,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1643355957, now seen corresponding path program 1 times [2023-03-30 23:45:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:29,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987715517] [2023-03-30 23:45:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:29,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:29,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987715517] [2023-03-30 23:45:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987715517] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:29,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:45:29,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:45:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013465062] [2023-03-30 23:45:29,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:29,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:45:29,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:45:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:29,656 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:45:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:36,282 INFO L93 Difference]: Finished difference Result 8641 states and 15457 transitions. [2023-03-30 23:45:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:45:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 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 94 [2023-03-30 23:45:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:36,314 INFO L225 Difference]: With dead ends: 8641 [2023-03-30 23:45:36,314 INFO L226 Difference]: Without dead ends: 6515 [2023-03-30 23:45:36,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-03-30 23:45:36,321 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3886 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 7099 mSolverCounterSat, 2118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3886 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 9217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2118 IncrementalHoareTripleChecker+Valid, 7099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3886 Valid, 117 Invalid, 9217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2118 Valid, 7099 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-30 23:45:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2023-03-30 23:45:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6485. [2023-03-30 23:45:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 6367 states have (on average 1.424532746976598) internal successors, (9070), 6388 states have internal predecessors, (9070), 29 states have call successors, (29), 29 states have call predecessors, (29), 88 states have return successors, (355), 67 states have call predecessors, (355), 28 states have call successors, (355) [2023-03-30 23:45:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9454 transitions. [2023-03-30 23:45:36,520 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9454 transitions. Word has length 94 [2023-03-30 23:45:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:36,520 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 9454 transitions. [2023-03-30 23:45:36,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:45:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9454 transitions. [2023-03-30 23:45:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-03-30 23:45:36,530 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:36,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:36,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:45:36,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:36,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:36,531 INFO L85 PathProgramCache]: Analyzing trace with hash -785337658, now seen corresponding path program 1 times [2023-03-30 23:45:36,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:36,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206968084] [2023-03-30 23:45:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:36,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206968084] [2023-03-30 23:45:37,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206968084] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:37,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169196823] [2023-03-30 23:45:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:37,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:37,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:37,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:45:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:37,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:37,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:45:37,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:37,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169196823] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:37,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:37,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2023-03-30 23:45:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737858562] [2023-03-30 23:45:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:37,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:45:37,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:45:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:37,246 INFO L87 Difference]: Start difference. First operand 6485 states and 9454 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:45:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:39,562 INFO L93 Difference]: Finished difference Result 12964 states and 18932 transitions. [2023-03-30 23:45:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:45:39,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 143 [2023-03-30 23:45:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:39,592 INFO L225 Difference]: With dead ends: 12964 [2023-03-30 23:45:39,592 INFO L226 Difference]: Without dead ends: 6485 [2023-03-30 23:45:39,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:45:39,607 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 792 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:39,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 861 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-30 23:45:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6485 states. [2023-03-30 23:45:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6485 to 6485. [2023-03-30 23:45:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 6367 states have (on average 1.3394063138055599) internal successors, (8528), 6388 states have internal predecessors, (8528), 29 states have call successors, (29), 29 states have call predecessors, (29), 88 states have return successors, (295), 67 states have call predecessors, (295), 28 states have call successors, (295) [2023-03-30 23:45:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 8852 transitions. [2023-03-30 23:45:39,818 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 8852 transitions. Word has length 143 [2023-03-30 23:45:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:39,819 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 8852 transitions. [2023-03-30 23:45:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-30 23:45:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 8852 transitions. [2023-03-30 23:45:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-30 23:45:39,825 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:39,826 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:39,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:40,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:40,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:40,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash 538407310, now seen corresponding path program 1 times [2023-03-30 23:45:40,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:40,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741350691] [2023-03-30 23:45:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:40,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-03-30 23:45:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-30 23:45:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741350691] [2023-03-30 23:45:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741350691] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209838065] [2023-03-30 23:45:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:40,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:40,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:40,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 23:45:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:40,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 23:45:40,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 23:45:40,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:45:40,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209838065] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:45:40,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:45:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-03-30 23:45:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430148980] [2023-03-30 23:45:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:45:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:45:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:45:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:45:40,631 INFO L87 Difference]: Start difference. First operand 6485 states and 8852 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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) [2023-03-30 23:45:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:44,068 INFO L93 Difference]: Finished difference Result 19794 states and 27752 transitions. [2023-03-30 23:45:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-30 23:45:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 173 [2023-03-30 23:45:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:44,133 INFO L225 Difference]: With dead ends: 19794 [2023-03-30 23:45:44,133 INFO L226 Difference]: Without dead ends: 13315 [2023-03-30 23:45:44,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-03-30 23:45:44,153 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2267 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3575 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 4997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 3575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:44,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 92 Invalid, 4997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 3575 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-30 23:45:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13315 states. [2023-03-30 23:45:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13315 to 12454. [2023-03-30 23:45:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12149 states have (on average 1.2292369742365628) internal successors, (14934), 12234 states have internal predecessors, (14934), 53 states have call successors, (53), 53 states have call predecessors, (53), 251 states have return successors, (1009), 166 states have call predecessors, (1009), 52 states have call successors, (1009) [2023-03-30 23:45:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 15996 transitions. [2023-03-30 23:45:44,525 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 15996 transitions. Word has length 173 [2023-03-30 23:45:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:44,533 INFO L495 AbstractCegarLoop]: Abstraction has 12454 states and 15996 transitions. [2023-03-30 23:45:44,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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) [2023-03-30 23:45:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 15996 transitions. [2023-03-30 23:45:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-03-30 23:45:44,538 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:44,539 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-30 23:45:44,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:44,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-30 23:45:44,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:44,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash 755251201, now seen corresponding path program 1 times [2023-03-30 23:45:44,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:44,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769154727] [2023-03-30 23:45:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2023-03-30 23:45:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 116 proven. 72 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-03-30 23:45:45,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:45,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769154727] [2023-03-30 23:45:45,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769154727] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:45,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217532564] [2023-03-30 23:45:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:45,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:45,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 23:45:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:45,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:45,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 251 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 23:45:45,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 117 proven. 73 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-03-30 23:45:45,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217532564] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:45,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:45,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-03-30 23:45:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384039622] [2023-03-30 23:45:45,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-30 23:45:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:45,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-30 23:45:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-03-30 23:45:45,706 INFO L87 Difference]: Start difference. First operand 12454 states and 15996 transitions. Second operand has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 9 states have internal predecessors, (417), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:45:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:45:52,613 INFO L93 Difference]: Finished difference Result 38937 states and 51946 transitions. [2023-03-30 23:45:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 23:45:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 9 states have internal predecessors, (417), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 296 [2023-03-30 23:45:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:45:52,686 INFO L225 Difference]: With dead ends: 38937 [2023-03-30 23:45:52,686 INFO L226 Difference]: Without dead ends: 22001 [2023-03-30 23:45:52,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 602 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-03-30 23:45:52,718 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3851 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 10694 mSolverCounterSat, 2312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3854 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 13006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2312 IncrementalHoareTripleChecker+Valid, 10694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:45:52,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3854 Valid, 187 Invalid, 13006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2312 Valid, 10694 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-30 23:45:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22001 states. [2023-03-30 23:45:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22001 to 18267. [2023-03-30 23:45:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18267 states, 17832 states have (on average 1.0916330192911619) internal successors, (19466), 17966 states have internal predecessors, (19466), 77 states have call successors, (77), 77 states have call predecessors, (77), 357 states have return successors, (1699), 223 states have call predecessors, (1699), 76 states have call successors, (1699) [2023-03-30 23:45:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18267 states to 18267 states and 21242 transitions. [2023-03-30 23:45:53,138 INFO L78 Accepts]: Start accepts. Automaton has 18267 states and 21242 transitions. Word has length 296 [2023-03-30 23:45:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:45:53,139 INFO L495 AbstractCegarLoop]: Abstraction has 18267 states and 21242 transitions. [2023-03-30 23:45:53,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.90909090909091) internal successors, (417), 9 states have internal predecessors, (417), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-03-30 23:45:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18267 states and 21242 transitions. [2023-03-30 23:45:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-03-30 23:45:53,144 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:45:53,144 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:45:53,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 23:45:53,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:53,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:45:53,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:45:53,351 INFO L85 PathProgramCache]: Analyzing trace with hash -590590990, now seen corresponding path program 1 times [2023-03-30 23:45:53,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:45:53,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228398949] [2023-03-30 23:45:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:53,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:45:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:45:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:45:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:45:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:45:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-03-30 23:45:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:45:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228398949] [2023-03-30 23:45:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228398949] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:45:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169799148] [2023-03-30 23:45:53,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:45:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:45:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:45:53,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:45:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 23:45:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:45:53,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:45:53,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:45:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-03-30 23:45:54,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:45:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-03-30 23:45:54,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169799148] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:45:54,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:45:54,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:45:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134752592] [2023-03-30 23:45:54,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:45:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:45:54,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:45:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:45:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:45:54,341 INFO L87 Difference]: Start difference. First operand 18267 states and 21242 transitions. Second operand has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:46:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:00,523 INFO L93 Difference]: Finished difference Result 62146 states and 75606 transitions. [2023-03-30 23:46:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-03-30 23:46:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 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 329 [2023-03-30 23:46:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:00,665 INFO L225 Difference]: With dead ends: 62146 [2023-03-30 23:46:00,665 INFO L226 Difference]: Without dead ends: 43885 [2023-03-30 23:46:00,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 676 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2023-03-30 23:46:00,714 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 3805 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 7974 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 9064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 7974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:00,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 260 Invalid, 9064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 7974 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-03-30 23:46:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43885 states. [2023-03-30 23:46:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43885 to 36785. [2023-03-30 23:46:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36785 states, 36085 states have (on average 1.0710544547595955) internal successors, (38649), 36280 states have internal predecessors, (38649), 155 states have call successors, (155), 155 states have call predecessors, (155), 544 states have return successors, (3506), 349 states have call predecessors, (3506), 154 states have call successors, (3506) [2023-03-30 23:46:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36785 states to 36785 states and 42310 transitions. [2023-03-30 23:46:01,527 INFO L78 Accepts]: Start accepts. Automaton has 36785 states and 42310 transitions. Word has length 329 [2023-03-30 23:46:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:01,527 INFO L495 AbstractCegarLoop]: Abstraction has 36785 states and 42310 transitions. [2023-03-30 23:46:01,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.583333333333332) internal successors, (379), 10 states have internal predecessors, (379), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-30 23:46:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 36785 states and 42310 transitions. [2023-03-30 23:46:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2023-03-30 23:46:01,558 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:01,559 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:01,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-30 23:46:01,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:01,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:01,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash 904586099, now seen corresponding path program 1 times [2023-03-30 23:46:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:01,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015917332] [2023-03-30 23:46:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:01,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-03-30 23:46:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-03-30 23:46:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:02,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:46:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015917332] [2023-03-30 23:46:02,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015917332] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:46:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380792692] [2023-03-30 23:46:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:02,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:46:02,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:46:02,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 23:46:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:02,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-30 23:46:02,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:46:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-03-30 23:46:03,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-30 23:46:03,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380792692] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:46:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-30 23:46:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-03-30 23:46:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115463863] [2023-03-30 23:46:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:46:03,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 23:46:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:46:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 23:46:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:46:03,025 INFO L87 Difference]: Start difference. First operand 36785 states and 42310 transitions. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-30 23:46:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:46:05,160 INFO L93 Difference]: Finished difference Result 87032 states and 100684 transitions. [2023-03-30 23:46:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 23:46:05,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 640 [2023-03-30 23:46:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:46:05,327 INFO L225 Difference]: With dead ends: 87032 [2023-03-30 23:46:05,328 INFO L226 Difference]: Without dead ends: 50253 [2023-03-30 23:46:05,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 652 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:46:05,388 INFO L413 NwaCegarLoop]: 1023 mSDtfsCounter, 696 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:46:05,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1049 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 23:46:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50253 states. [2023-03-30 23:46:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50253 to 47445. [2023-03-30 23:46:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47445 states, 46601 states have (on average 1.061350614793674) internal successors, (49460), 46828 states have internal predecessors, (49460), 200 states have call successors, (200), 200 states have call predecessors, (200), 643 states have return successors, (4198), 416 states have call predecessors, (4198), 199 states have call successors, (4198) [2023-03-30 23:46:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47445 states to 47445 states and 53858 transitions. [2023-03-30 23:46:06,541 INFO L78 Accepts]: Start accepts. Automaton has 47445 states and 53858 transitions. Word has length 640 [2023-03-30 23:46:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:46:06,542 INFO L495 AbstractCegarLoop]: Abstraction has 47445 states and 53858 transitions. [2023-03-30 23:46:06,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-30 23:46:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 47445 states and 53858 transitions. [2023-03-30 23:46:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2023-03-30 23:46:06,628 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:46:06,629 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:46:06,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 23:46:06,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:46:06,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:46:06,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:46:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash -11798364, now seen corresponding path program 1 times [2023-03-30 23:46:06,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:46:06,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439388461] [2023-03-30 23:46:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:46:06,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:46:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:46:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:46:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-03-30 23:46:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2023-03-30 23:46:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:46:07,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 449 [2023-03-30 23:46:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat