/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/Problem12_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:33:33,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:33:33,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:33:33,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:33:33,546 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 22:33:33,576 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:33:33,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:33:33,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:33:33,577 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:33:33,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:33:33,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:33:33,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:33:33,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:33:33,578 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:33:33,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:33:33,579 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:33:33,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:33:33,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:33:33,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:33:33,581 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:33:33,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:33:33,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:33:33,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:33:33,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:33:33,823 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:33:33,823 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:33:33,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label53.c [2023-04-01 22:33:35,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:33:35,578 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:33:35,578 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label53.c [2023-04-01 22:33:35,605 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562e8469b/b03ca7230ea8407a9e4f637d90f5dd77/FLAG24d538bf9 [2023-04-01 22:33:35,622 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562e8469b/b03ca7230ea8407a9e4f637d90f5dd77 [2023-04-01 22:33:35,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:33:35,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:33:35,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:33:35,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:33:35,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:33:35,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:35" (1/1) ... [2023-04-01 22:33:35,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df87fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:35, skipping insertion in model container [2023-04-01 22:33:35,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:35" (1/1) ... [2023-04-01 22:33:35,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:33:35,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:33:36,021 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/Problem12_label53.c[4245,4258] [2023-04-01 22:33:36,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:33:36,770 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:33:36,784 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/Problem12_label53.c[4245,4258] [2023-04-01 22:33:37,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:33:37,119 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:33:37,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37 WrapperNode [2023-04-01 22:33:37,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:33:37,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:33:37,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:33:37,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:33:37,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:33:37,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:33:37,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:33:37,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:33:37,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (1/1) ... [2023-04-01 22:33:37,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:33:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:33:37,494 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 22:33:37,518 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 22:33:37,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:33:37,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:33:37,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:33:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:33:37,537 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:33:37,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:33:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:33:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:33:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:33:37,609 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:33:37,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:33:41,492 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:33:41,503 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:33:41,503 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:33:41,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:41 BoogieIcfgContainer [2023-04-01 22:33:41,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:33:41,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:33:41,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:33:41,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:33:41,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:33:35" (1/3) ... [2023-04-01 22:33:41,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50897886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:41, skipping insertion in model container [2023-04-01 22:33:41,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:37" (2/3) ... [2023-04-01 22:33:41,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50897886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:41, skipping insertion in model container [2023-04-01 22:33:41,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:41" (3/3) ... [2023-04-01 22:33:41,511 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label53.c [2023-04-01 22:33:41,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:33:41,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:33:41,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:33:41,608 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;@2af79758, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:33:41,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:33:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:33:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 22:33:41,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:33:41,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:33:41,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:33:41,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:33:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1995912699, now seen corresponding path program 1 times [2023-04-01 22:33:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:33:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180887270] [2023-04-01 22:33:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:41,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:33:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:42,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:33:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:42,120 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 22:33:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:33:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180887270] [2023-04-01 22:33:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180887270] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:33:42,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:33:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:33:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309042015] [2023-04-01 22:33:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:33:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:33:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:33:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:33:42,157 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:33:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:33:47,162 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2023-04-01 22:33:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 22:33:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-01 22:33:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:33:47,184 INFO L225 Difference]: With dead ends: 2471 [2023-04-01 22:33:47,184 INFO L226 Difference]: Without dead ends: 1568 [2023-04-01 22:33:47,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:33:47,198 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3311 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 1478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3311 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1478 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:33:47,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3311 Valid, 46 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1478 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 22:33:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-04-01 22:33:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2023-04-01 22:33:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1529 states have (on average 1.8521909744931329) internal successors, (2832), 1530 states have internal predecessors, (2832), 10 states have call successors, (10), 10 states have call predecessors, (10), 13 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2023-04-01 22:33:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2863 transitions. [2023-04-01 22:33:47,308 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2863 transitions. Word has length 38 [2023-04-01 22:33:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:33:47,309 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 2863 transitions. [2023-04-01 22:33:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:33:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2863 transitions. [2023-04-01 22:33:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 22:33:47,315 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:33:47,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:33:47,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:33:47,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:33:47,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:33:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1118119477, now seen corresponding path program 1 times [2023-04-01 22:33:47,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:33:47,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388679901] [2023-04-01 22:33:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:33:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:47,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:33:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:33:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:33:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:33:47,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388679901] [2023-04-01 22:33:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388679901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:33:47,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:33:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:33:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145942645] [2023-04-01 22:33:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:33:47,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:33:47,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:47,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:33:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:33:47,727 INFO L87 Difference]: Start difference. First operand 1553 states and 2863 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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 22:33:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:33:53,368 INFO L93 Difference]: Finished difference Result 4757 states and 8776 transitions. [2023-04-01 22:33:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:33:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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 107 [2023-04-01 22:33:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:33:53,385 INFO L225 Difference]: With dead ends: 4757 [2023-04-01 22:33:53,385 INFO L226 Difference]: Without dead ends: 3210 [2023-04-01 22:33:53,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:33:53,391 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3152 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5597 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3152 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 6532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 5597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-01 22:33:53,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3152 Valid, 124 Invalid, 6532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 5597 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-04-01 22:33:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2023-04-01 22:33:53,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3139. [2023-04-01 22:33:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 3080 states have (on average 1.6357142857142857) internal successors, (5038), 3086 states have internal predecessors, (5038), 18 states have call successors, (18), 18 states have call predecessors, (18), 40 states have return successors, (85), 34 states have call predecessors, (85), 17 states have call successors, (85) [2023-04-01 22:33:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5141 transitions. [2023-04-01 22:33:53,493 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5141 transitions. Word has length 107 [2023-04-01 22:33:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:33:53,494 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 5141 transitions. [2023-04-01 22:33:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 4 states have internal predecessors, (101), 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 22:33:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5141 transitions. [2023-04-01 22:33:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 22:33:53,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:33:53,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:33:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 22:33:53,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:33:53,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:33:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1215055647, now seen corresponding path program 1 times [2023-04-01 22:33:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:33:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588241821] [2023-04-01 22:33:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:33:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:33:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:53,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:33:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:33:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:33:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588241821] [2023-04-01 22:33:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588241821] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:33:53,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730543297] [2023-04-01 22:33:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:53,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:33:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:33:53,989 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 22:33:53,996 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 22:33:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:54,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 22:33:54,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:33:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:33:54,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:33:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:33:54,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730543297] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 22:33:54,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 22:33:54,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-04-01 22:33:54,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335618431] [2023-04-01 22:33:54,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:33:54,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 22:33:54,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 22:33:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:33:54,824 INFO L87 Difference]: Start difference. First operand 3139 states and 5141 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:33:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:33:58,315 INFO L93 Difference]: Finished difference Result 9470 states and 15729 transitions. [2023-04-01 22:33:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 22:33:58,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2023-04-01 22:33:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:33:58,344 INFO L225 Difference]: With dead ends: 9470 [2023-04-01 22:33:58,345 INFO L226 Difference]: Without dead ends: 6337 [2023-04-01 22:33:58,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:33:58,352 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2381 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 3964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 22:33:58,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2381 Valid, 60 Invalid, 3964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 22:33:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2023-04-01 22:33:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6337. [2023-04-01 22:33:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6337 states, 6198 states have (on average 1.5037108744756373) internal successors, (9320), 6218 states have internal predecessors, (9320), 34 states have call successors, (34), 34 states have call predecessors, (34), 104 states have return successors, (368), 84 states have call predecessors, (368), 33 states have call successors, (368) [2023-04-01 22:33:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6337 states to 6337 states and 9722 transitions. [2023-04-01 22:33:58,519 INFO L78 Accepts]: Start accepts. Automaton has 6337 states and 9722 transitions. Word has length 113 [2023-04-01 22:33:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:33:58,520 INFO L495 AbstractCegarLoop]: Abstraction has 6337 states and 9722 transitions. [2023-04-01 22:33:58,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:33:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6337 states and 9722 transitions. [2023-04-01 22:33:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-04-01 22:33:58,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:33:58,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:58,537 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 22:33:58,733 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 [2023-04-01 22:33:58,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:33:58,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:33:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1455838763, now seen corresponding path program 1 times [2023-04-01 22:33:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:33:58,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590358494] [2023-04-01 22:33:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:33:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:59,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:33:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:59,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:33:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 22:33:59,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:33:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590358494] [2023-04-01 22:33:59,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590358494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:33:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987995888] [2023-04-01 22:33:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:59,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:33:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:33:59,218 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 22:33:59,220 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 22:33:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:59,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:33:59,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:33:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:33:59,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:33:59,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987995888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:33:59,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:33:59,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-04-01 22:33:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18626913] [2023-04-01 22:33:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:33:59,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:33:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:33:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:33:59,400 INFO L87 Difference]: Start difference. First operand 6337 states and 9722 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 22:34:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:34:02,313 INFO L93 Difference]: Finished difference Result 18952 states and 29959 transitions. [2023-04-01 22:34:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:34:02,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 187 [2023-04-01 22:34:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:34:02,375 INFO L225 Difference]: With dead ends: 18952 [2023-04-01 22:34:02,375 INFO L226 Difference]: Without dead ends: 12621 [2023-04-01 22:34:02,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 191 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 22:34:02,395 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 763 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:34:02,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 645 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:34:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2023-04-01 22:34:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 12621. [2023-04-01 22:34:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12621 states, 12362 states have (on average 1.3583562530334898) internal successors, (16792), 12402 states have internal predecessors, (16792), 66 states have call successors, (66), 66 states have call predecessors, (66), 192 states have return successors, (1243), 152 states have call predecessors, (1243), 65 states have call successors, (1243) [2023-04-01 22:34:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 18101 transitions. [2023-04-01 22:34:02,807 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 18101 transitions. Word has length 187 [2023-04-01 22:34:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:34:02,814 INFO L495 AbstractCegarLoop]: Abstraction has 12621 states and 18101 transitions. [2023-04-01 22:34:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 22:34:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 18101 transitions. [2023-04-01 22:34:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-01 22:34:02,825 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:34:02,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:02,843 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 22:34:03,044 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 [2023-04-01 22:34:03,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:34:03,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:34:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1112773252, now seen corresponding path program 1 times [2023-04-01 22:34:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:34:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911979839] [2023-04-01 22:34:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:34:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:03,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:34:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:03,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:34:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:03,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2023-04-01 22:34:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 62 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 22:34:03,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:34:03,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911979839] [2023-04-01 22:34:03,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911979839] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:34:03,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960131159] [2023-04-01 22:34:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:03,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:34:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:34:03,442 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 22:34:03,445 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 22:34:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:03,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 22:34:03,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:34:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 22:34:03,768 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:34:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960131159] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:34:03,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:34:03,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 22:34:03,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916744851] [2023-04-01 22:34:03,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:34:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:34:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:34:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:34:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 22:34:03,770 INFO L87 Difference]: Start difference. First operand 12621 states and 18101 transitions. Second operand has 5 states, 5 states have (on average 39.4) internal successors, (197), 4 states have internal predecessors, (197), 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 22:34:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:34:07,934 INFO L93 Difference]: Finished difference Result 31972 states and 47013 transitions. [2023-04-01 22:34:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 22:34:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 4 states have internal predecessors, (197), 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 235 [2023-04-01 22:34:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:34:08,012 INFO L225 Difference]: With dead ends: 31972 [2023-04-01 22:34:08,012 INFO L226 Difference]: Without dead ends: 19357 [2023-04-01 22:34:08,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:34:08,044 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2172 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2172 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:34:08,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2172 Valid, 104 Invalid, 5430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 22:34:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19357 states. [2023-04-01 22:34:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19357 to 19191. [2023-04-01 22:34:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19191 states, 18701 states have (on average 1.2875782043740975) internal successors, (24079), 18808 states have internal predecessors, (24079), 98 states have call successors, (98), 98 states have call predecessors, (98), 391 states have return successors, (2796), 284 states have call predecessors, (2796), 97 states have call successors, (2796) [2023-04-01 22:34:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19191 states to 19191 states and 26973 transitions. [2023-04-01 22:34:08,641 INFO L78 Accepts]: Start accepts. Automaton has 19191 states and 26973 transitions. Word has length 235 [2023-04-01 22:34:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:34:08,642 INFO L495 AbstractCegarLoop]: Abstraction has 19191 states and 26973 transitions. [2023-04-01 22:34:08,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 4 states have internal predecessors, (197), 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 22:34:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19191 states and 26973 transitions. [2023-04-01 22:34:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-04-01 22:34:08,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:34:08,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:08,655 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 22:34:08,851 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 [2023-04-01 22:34:08,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:34:08,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:34:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash 492081144, now seen corresponding path program 1 times [2023-04-01 22:34:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:34:08,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926362649] [2023-04-01 22:34:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:34:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:34:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:34:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:34:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:34:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926362649] [2023-04-01 22:34:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926362649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:34:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:34:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:34:09,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650903863] [2023-04-01 22:34:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:34:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:34:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:34:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:34:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:34:09,299 INFO L87 Difference]: Start difference. First operand 19191 states and 26973 transitions. Second operand has 8 states, 7 states have (on average 32.857142857142854) internal successors, (230), 5 states have internal predecessors, (230), 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 22:34:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:34:16,295 INFO L93 Difference]: Finished difference Result 75935 states and 114521 transitions. [2023-04-01 22:34:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 22:34:16,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 32.857142857142854) internal successors, (230), 5 states have internal predecessors, (230), 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 236 [2023-04-01 22:34:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:34:16,573 INFO L225 Difference]: With dead ends: 75935 [2023-04-01 22:34:16,573 INFO L226 Difference]: Without dead ends: 56750 [2023-04-01 22:34:16,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:34:16,626 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7504 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 5966 mSolverCounterSat, 2433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7504 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 8399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2433 IncrementalHoareTripleChecker+Valid, 5966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:34:16,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7504 Valid, 152 Invalid, 8399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2433 Valid, 5966 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-04-01 22:34:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56750 states. [2023-04-01 22:34:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56750 to 52014. [2023-04-01 22:34:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52014 states, 50662 states have (on average 1.2121116418617504) internal successors, (61408), 50995 states have internal predecessors, (61408), 262 states have call successors, (262), 262 states have call predecessors, (262), 1089 states have return successors, (11204), 756 states have call predecessors, (11204), 261 states have call successors, (11204) [2023-04-01 22:34:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52014 states to 52014 states and 72874 transitions. [2023-04-01 22:34:17,962 INFO L78 Accepts]: Start accepts. Automaton has 52014 states and 72874 transitions. Word has length 236 [2023-04-01 22:34:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:34:17,963 INFO L495 AbstractCegarLoop]: Abstraction has 52014 states and 72874 transitions. [2023-04-01 22:34:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 32.857142857142854) internal successors, (230), 5 states have internal predecessors, (230), 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 22:34:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 52014 states and 72874 transitions. [2023-04-01 22:34:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-04-01 22:34:17,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:34:17,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:17,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 22:34:17,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:34:17,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:34:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -954148292, now seen corresponding path program 1 times [2023-04-01 22:34:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:34:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475075566] [2023-04-01 22:34:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:34:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:18,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:34:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:18,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:34:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:18,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-04-01 22:34:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:34:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:34:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475075566] [2023-04-01 22:34:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475075566] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:34:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252297920] [2023-04-01 22:34:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:34:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:34:18,329 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 22:34:18,332 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 22:34:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:18,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:34:18,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:34:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:34:18,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:34:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:34:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252297920] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:34:18,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:34:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:34:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126266425] [2023-04-01 22:34:18,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:34:18,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:34:18,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:34:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:34:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:34:18,947 INFO L87 Difference]: Start difference. First operand 52014 states and 72874 transitions. Second operand has 12 states, 12 states have (on average 39.166666666666664) internal successors, (470), 10 states have internal predecessors, (470), 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 22:34:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:34:29,214 INFO L93 Difference]: Finished difference Result 155047 states and 232178 transitions. [2023-04-01 22:34:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 22:34:29,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 39.166666666666664) internal successors, (470), 10 states have internal predecessors, (470), 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 283 [2023-04-01 22:34:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:34:29,802 INFO L225 Difference]: With dead ends: 155047 [2023-04-01 22:34:29,803 INFO L226 Difference]: Without dead ends: 103039 [2023-04-01 22:34:29,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 572 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-01 22:34:29,912 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6176 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 11714 mSolverCounterSat, 2703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6182 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 14417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2703 IncrementalHoareTripleChecker+Valid, 11714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:34:29,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6182 Valid, 187 Invalid, 14417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2703 Valid, 11714 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-04-01 22:34:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103039 states. [2023-04-01 22:34:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103039 to 97355. [2023-04-01 22:34:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97355 states, 94967 states have (on average 1.1393747301694273) internal successors, (108203), 95510 states have internal predecessors, (108203), 582 states have call successors, (582), 490 states have call predecessors, (582), 1805 states have return successors, (23260), 1354 states have call predecessors, (23260), 581 states have call successors, (23260) [2023-04-01 22:34:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97355 states to 97355 states and 132045 transitions. [2023-04-01 22:34:32,667 INFO L78 Accepts]: Start accepts. Automaton has 97355 states and 132045 transitions. Word has length 283 [2023-04-01 22:34:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:34:32,668 INFO L495 AbstractCegarLoop]: Abstraction has 97355 states and 132045 transitions. [2023-04-01 22:34:32,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.166666666666664) internal successors, (470), 10 states have internal predecessors, (470), 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 22:34:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 97355 states and 132045 transitions. [2023-04-01 22:34:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-04-01 22:34:32,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:34:32,694 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:32,702 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 22:34:32,900 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 22:34:32,900 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:34:32,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:34:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 110218532, now seen corresponding path program 1 times [2023-04-01 22:34:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:34:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10919259] [2023-04-01 22:34:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:34:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:34:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:34:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 22:34:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 22:34:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2023-04-01 22:34:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 126 proven. 16 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-04-01 22:34:33,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:34:33,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10919259] [2023-04-01 22:34:33,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10919259] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:34:33,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932004679] [2023-04-01 22:34:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:34:33,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:34:33,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:34:33,633 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 22:34:33,637 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 22:34:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:34:33,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:34:33,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:34:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 313 proven. 30 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-04-01 22:34:33,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:34:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-04-01 22:34:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932004679] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:34:34,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:34:34,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-04-01 22:34:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295130202] [2023-04-01 22:34:34,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:34:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:34:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:34:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:34:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:34:34,292 INFO L87 Difference]: Start difference. First operand 97355 states and 132045 transitions. Second operand has 15 states, 15 states have (on average 26.2) internal successors, (393), 13 states have internal predecessors, (393), 6 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:35:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:35:08,468 INFO L93 Difference]: Finished difference Result 368198 states and 530740 transitions. [2023-04-01 22:35:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-01 22:35:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 26.2) internal successors, (393), 13 states have internal predecessors, (393), 6 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 453 [2023-04-01 22:35:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:35:08,472 INFO L225 Difference]: With dead ends: 368198 [2023-04-01 22:35:08,472 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 22:35:08,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1010, Invalid=4392, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 22:35:08,864 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 27726 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 42863 mSolverCounterSat, 7203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27726 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 50066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 7203 IncrementalHoareTripleChecker+Valid, 42863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:35:08,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27726 Valid, 904 Invalid, 50066 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [7203 Valid, 42863 Invalid, 0 Unknown, 0 Unchecked, 28.9s Time] [2023-04-01 22:35:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 22:35:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 22:35:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 22:35:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 22:35:08,866 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 453 [2023-04-01 22:35:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:35:08,866 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 22:35:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 26.2) internal successors, (393), 13 states have internal predecessors, (393), 6 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 22:35:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 22:35:08,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 22:35:08,869 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 22:35:08,874 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 22:35:09,070 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 22:35:09,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 22:36:21,915 WARN L223 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 1007 DAG size of output: 1031 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-04-01 22:37:28,067 WARN L223 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 1007 DAG size of output: 1031 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)