/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/Problem17_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 23:23:59,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 23:23:59,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 23:23:59,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 23:24:00,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 23:24:00,028 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 23:24:00,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 23:24:00,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 23:24:00,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 23:24:00,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 23:24:00,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 23:24:00,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 23:24:00,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 23:24:00,030 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 23:24:00,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 23:24:00,030 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 23:24:00,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 23:24:00,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 23:24:00,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 23:24:00,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 23:24:00,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 23:24:00,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 23:24:00,032 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 23:24:00,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 23:24:00,032 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 23:24:00,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 23:24:00,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 23:24:00,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 23:24:00,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 23:24:00,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:24:00,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 23:24:00,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 23:24:00,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 23:24:00,034 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 23:24:00,035 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 23:24:00,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 23:24:00,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 23:24:00,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 23:24:00,280 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 23:24:00,280 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 23:24:00,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2023-04-01 23:24:01,366 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 23:24:01,798 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 23:24:01,799 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label21.c [2023-04-01 23:24:01,822 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0221a74db/3fae596bcb224528b9dcccf36bd98fdb/FLAGc72cf143d [2023-04-01 23:24:01,837 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0221a74db/3fae596bcb224528b9dcccf36bd98fdb [2023-04-01 23:24:01,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 23:24:01,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 23:24:01,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 23:24:01,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 23:24:01,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 23:24:01,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:24:01" (1/1) ... [2023-04-01 23:24:01,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180d9614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:01, skipping insertion in model container [2023-04-01 23:24:01,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:24:01" (1/1) ... [2023-04-01 23:24:01,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 23:24:01,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 23:24:02,177 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/Problem17_label21.c[8748,8761] [2023-04-01 23:24:02,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:24:02,749 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 23:24:02,806 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/Problem17_label21.c[8748,8761] [2023-04-01 23:24:03,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 23:24:03,055 INFO L208 MainTranslator]: Completed translation [2023-04-01 23:24:03,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03 WrapperNode [2023-04-01 23:24:03,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 23:24:03,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 23:24:03,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 23:24:03,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 23:24:03,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 23:24:03,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 23:24:03,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 23:24:03,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 23:24:03,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (1/1) ... [2023-04-01 23:24:03,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 23:24:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:03,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 23:24:03,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 23:24:03,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 23:24:03,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 23:24:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 23:24:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 23:24:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 23:24:03,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 23:24:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 23:24:03,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 23:24:03,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 23:24:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 23:24:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 23:24:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 23:24:03,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 23:24:03,465 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 23:24:03,467 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 23:24:06,477 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 23:24:06,494 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 23:24:06,495 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 23:24:06,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:24:06 BoogieIcfgContainer [2023-04-01 23:24:06,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 23:24:06,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 23:24:06,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 23:24:06,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 23:24:06,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:24:01" (1/3) ... [2023-04-01 23:24:06,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b13656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:24:06, skipping insertion in model container [2023-04-01 23:24:06,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:24:03" (2/3) ... [2023-04-01 23:24:06,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b13656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:24:06, skipping insertion in model container [2023-04-01 23:24:06,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:24:06" (3/3) ... [2023-04-01 23:24:06,507 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2023-04-01 23:24:06,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 23:24:06,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 23:24:06,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 23:24:06,601 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;@2a7565cc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 23:24:06,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 23:24:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 23:24:06,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 23:24:06,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:06,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:06,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:06,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -510335366, now seen corresponding path program 1 times [2023-04-01 23:24:06,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:06,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992698405] [2023-04-01 23:24:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:06,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:07,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992698405] [2023-04-01 23:24:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992698405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:24:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:24:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 23:24:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117911654] [2023-04-01 23:24:07,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:24:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 23:24:07,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 23:24:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 23:24:07,277 INFO L87 Difference]: Start difference. First operand has 603 states, 593 states have (on average 1.7993254637436762) internal successors, (1067), 594 states have internal predecessors, (1067), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:24:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:11,231 INFO L93 Difference]: Finished difference Result 1692 states and 3091 transitions. [2023-04-01 23:24:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:24:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 65 [2023-04-01 23:24:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:11,255 INFO L225 Difference]: With dead ends: 1692 [2023-04-01 23:24:11,256 INFO L226 Difference]: Without dead ends: 1012 [2023-04-01 23:24:11,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:24:11,272 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1439 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:11,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 135 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 23:24:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-04-01 23:24:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1002. [2023-04-01 23:24:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 986 states have (on average 1.5446247464503042) internal successors, (1523), 988 states have internal predecessors, (1523), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 23:24:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1542 transitions. [2023-04-01 23:24:11,392 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1542 transitions. Word has length 65 [2023-04-01 23:24:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:11,394 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1542 transitions. [2023-04-01 23:24:11,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 23:24:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1542 transitions. [2023-04-01 23:24:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 23:24:11,405 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:11,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:11,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 23:24:11,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:11,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:11,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1845493247, now seen corresponding path program 1 times [2023-04-01 23:24:11,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:11,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384762541] [2023-04-01 23:24:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:11,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:11,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:11,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384762541] [2023-04-01 23:24:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384762541] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:24:11,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:24:11,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:24:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898789212] [2023-04-01 23:24:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:24:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 23:24:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 23:24:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:24:11,901 INFO L87 Difference]: Start difference. First operand 1002 states and 1542 transitions. Second operand has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:24:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:16,154 INFO L93 Difference]: Finished difference Result 2962 states and 4571 transitions. [2023-04-01 23:24:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:24:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 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 136 [2023-04-01 23:24:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:16,165 INFO L225 Difference]: With dead ends: 2962 [2023-04-01 23:24:16,165 INFO L226 Difference]: Without dead ends: 1966 [2023-04-01 23:24:16,171 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 23:24:16,174 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1610 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:16,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 332 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 23:24:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-04-01 23:24:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1914. [2023-04-01 23:24:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1880 states have (on average 1.2920212765957446) internal successors, (2429), 1888 states have internal predecessors, (2429), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (43), 15 states have call predecessors, (43), 9 states have call successors, (43) [2023-04-01 23:24:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2482 transitions. [2023-04-01 23:24:16,258 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2482 transitions. Word has length 136 [2023-04-01 23:24:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:16,260 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2482 transitions. [2023-04-01 23:24:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 4 states have internal predecessors, (130), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:24:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2482 transitions. [2023-04-01 23:24:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-04-01 23:24:16,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:16,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:16,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 23:24:16,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:16,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -578112915, now seen corresponding path program 1 times [2023-04-01 23:24:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698974349] [2023-04-01 23:24:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:16,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698974349] [2023-04-01 23:24:16,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698974349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:16,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951342266] [2023-04-01 23:24:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:16,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:16,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:16,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 23:24:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:16,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 23:24:16,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:19,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:24:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:19,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951342266] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:24:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2023-04-01 23:24:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506185534] [2023-04-01 23:24:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:24:19,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 23:24:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 23:24:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:24:19,833 INFO L87 Difference]: Start difference. First operand 1914 states and 2482 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:24:23,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:23,978 INFO L93 Difference]: Finished difference Result 7458 states and 9831 transitions. [2023-04-01 23:24:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 23:24:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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 139 [2023-04-01 23:24:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:24,000 INFO L225 Difference]: With dead ends: 7458 [2023-04-01 23:24:24,000 INFO L226 Difference]: Without dead ends: 5550 [2023-04-01 23:24:24,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-04-01 23:24:24,006 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1898 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2660 mSolverCounterSat, 1661 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 4321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1661 IncrementalHoareTripleChecker+Valid, 2660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:24,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 247 Invalid, 4321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1661 Valid, 2660 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 23:24:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2023-04-01 23:24:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5063. [2023-04-01 23:24:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 4969 states have (on average 1.285570537331455) internal successors, (6388), 4995 states have internal predecessors, (6388), 24 states have call successors, (24), 24 states have call predecessors, (24), 69 states have return successors, (253), 43 states have call predecessors, (253), 23 states have call successors, (253) [2023-04-01 23:24:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 6665 transitions. [2023-04-01 23:24:24,140 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 6665 transitions. Word has length 139 [2023-04-01 23:24:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:24,142 INFO L495 AbstractCegarLoop]: Abstraction has 5063 states and 6665 transitions. [2023-04-01 23:24:24,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 23:24:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 6665 transitions. [2023-04-01 23:24:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-04-01 23:24:24,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:24,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:24:24,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 23:24:24,351 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 23:24:24,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:24,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:24,352 INFO L85 PathProgramCache]: Analyzing trace with hash -735708094, now seen corresponding path program 1 times [2023-04-01 23:24:24,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:24,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526077941] [2023-04-01 23:24:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:24,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:24,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:24,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:24:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:24:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526077941] [2023-04-01 23:24:24,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526077941] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:24,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997848789] [2023-04-01 23:24:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:24,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:24,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:24,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:24,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 23:24:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:24,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:24:24,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-04-01 23:24:24,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:24:24,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997848789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:24:24,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:24:24,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:24:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662860511] [2023-04-01 23:24:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:24:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:24:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:24,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:24:24,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:24:24,928 INFO L87 Difference]: Start difference. First operand 5063 states and 6665 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:24:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:27,020 INFO L93 Difference]: Finished difference Result 14072 states and 18908 transitions. [2023-04-01 23:24:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:24:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 227 [2023-04-01 23:24:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:27,061 INFO L225 Difference]: With dead ends: 14072 [2023-04-01 23:24:27,061 INFO L226 Difference]: Without dead ends: 9015 [2023-04-01 23:24:27,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:24:27,075 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 398 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:27,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 565 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 23:24:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9015 states. [2023-04-01 23:24:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9015 to 7277. [2023-04-01 23:24:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7142 states have (on average 1.2353682441893028) internal successors, (8823), 7179 states have internal predecessors, (8823), 34 states have call successors, (34), 34 states have call predecessors, (34), 100 states have return successors, (484), 63 states have call predecessors, (484), 33 states have call successors, (484) [2023-04-01 23:24:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 9341 transitions. [2023-04-01 23:24:27,293 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 9341 transitions. Word has length 227 [2023-04-01 23:24:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:27,298 INFO L495 AbstractCegarLoop]: Abstraction has 7277 states and 9341 transitions. [2023-04-01 23:24:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:24:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 9341 transitions. [2023-04-01 23:24:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-04-01 23:24:27,301 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:27,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 23:24:27,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 23:24:27,510 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 23:24:27,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:27,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:27,511 INFO L85 PathProgramCache]: Analyzing trace with hash -632414944, now seen corresponding path program 1 times [2023-04-01 23:24:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479901794] [2023-04-01 23:24:27,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:27,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:27,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:27,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:24:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 23:24:27,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479901794] [2023-04-01 23:24:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479901794] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130325172] [2023-04-01 23:24:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:27,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:27,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:27,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 23:24:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:28,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:24:28,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:28,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:24:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 23:24:28,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130325172] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:24:28,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:24:28,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 23:24:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626426289] [2023-04-01 23:24:28,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:24:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:24:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:24:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-04-01 23:24:28,421 INFO L87 Difference]: Start difference. First operand 7277 states and 9341 transitions. Second operand has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:24:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:33,672 INFO L93 Difference]: Finished difference Result 18121 states and 24228 transitions. [2023-04-01 23:24:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 23:24:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 234 [2023-04-01 23:24:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:33,721 INFO L225 Difference]: With dead ends: 18121 [2023-04-01 23:24:33,721 INFO L226 Difference]: Without dead ends: 10850 [2023-04-01 23:24:33,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 473 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-04-01 23:24:33,740 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 4951 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 5550 mSolverCounterSat, 1551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4959 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 7101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1551 IncrementalHoareTripleChecker+Valid, 5550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:33,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4959 Valid, 333 Invalid, 7101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1551 Valid, 5550 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-04-01 23:24:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2023-04-01 23:24:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 9963. [2023-04-01 23:24:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9766 states have (on average 1.235101372107311) internal successors, (12062), 9824 states have internal predecessors, (12062), 46 states have call successors, (46), 46 states have call predecessors, (46), 150 states have return successors, (795), 92 states have call predecessors, (795), 45 states have call successors, (795) [2023-04-01 23:24:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 12903 transitions. [2023-04-01 23:24:34,005 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 12903 transitions. Word has length 234 [2023-04-01 23:24:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:34,005 INFO L495 AbstractCegarLoop]: Abstraction has 9963 states and 12903 transitions. [2023-04-01 23:24:34,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.90909090909091) internal successors, (384), 9 states have internal predecessors, (384), 4 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 23:24:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 12903 transitions. [2023-04-01 23:24:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-04-01 23:24:34,012 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:34,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:34,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 23:24:34,218 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 23:24:34,218 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:34,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1350585826, now seen corresponding path program 1 times [2023-04-01 23:24:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:34,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819469736] [2023-04-01 23:24:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:34,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:24:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:24:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-04-01 23:24:34,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819469736] [2023-04-01 23:24:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819469736] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679378156] [2023-04-01 23:24:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:34,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:34,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 23:24:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:34,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:24:34,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:24:35,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:24:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 348 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-04-01 23:24:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679378156] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 23:24:35,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 23:24:35,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2023-04-01 23:24:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629011754] [2023-04-01 23:24:35,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 23:24:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 23:24:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 23:24:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 23:24:35,389 INFO L87 Difference]: Start difference. First operand 9963 states and 12903 transitions. Second operand has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:24:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:40,030 INFO L93 Difference]: Finished difference Result 25570 states and 35197 transitions. [2023-04-01 23:24:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 23:24:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 336 [2023-04-01 23:24:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:40,080 INFO L225 Difference]: With dead ends: 25570 [2023-04-01 23:24:40,080 INFO L226 Difference]: Without dead ends: 13796 [2023-04-01 23:24:40,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 681 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-04-01 23:24:40,105 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1774 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4171 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 4171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:40,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1780 Valid, 357 Invalid, 5006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 4171 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 23:24:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13796 states. [2023-04-01 23:24:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13796 to 13644. [2023-04-01 23:24:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13315 states have (on average 1.145324821629741) internal successors, (15250), 13437 states have internal predecessors, (15250), 62 states have call successors, (62), 62 states have call predecessors, (62), 266 states have return successors, (1425), 144 states have call predecessors, (1425), 61 states have call successors, (1425) [2023-04-01 23:24:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 16737 transitions. [2023-04-01 23:24:40,400 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 16737 transitions. Word has length 336 [2023-04-01 23:24:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:40,400 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 16737 transitions. [2023-04-01 23:24:40,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 47.888888888888886) internal successors, (431), 7 states have internal predecessors, (431), 3 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:24:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 16737 transitions. [2023-04-01 23:24:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-01 23:24:40,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:40,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:40,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 23:24:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:40,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:40,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1291023127, now seen corresponding path program 1 times [2023-04-01 23:24:40,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:40,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427489216] [2023-04-01 23:24:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:40,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:41,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:24:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:24:41,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:41,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427489216] [2023-04-01 23:24:41,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427489216] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:41,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828552841] [2023-04-01 23:24:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:41,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:41,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:41,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:41,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 23:24:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:41,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:24:41,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 23:24:41,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:24:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828552841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:24:41,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:24:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:24:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998707838] [2023-04-01 23:24:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:24:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:24:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:24:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:24:41,362 INFO L87 Difference]: Start difference. First operand 13644 states and 16737 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:24:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:24:43,306 INFO L93 Difference]: Finished difference Result 35242 states and 44623 transitions. [2023-04-01 23:24:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:24:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 350 [2023-04-01 23:24:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:24:43,374 INFO L225 Difference]: With dead ends: 35242 [2023-04-01 23:24:43,374 INFO L226 Difference]: Without dead ends: 21604 [2023-04-01 23:24:43,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 355 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:24:43,404 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 429 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:24:43,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 423 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:24:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21604 states. [2023-04-01 23:24:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21604 to 18528. [2023-04-01 23:24:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18528 states, 18100 states have (on average 1.1449723756906078) internal successors, (20724), 18262 states have internal predecessors, (20724), 84 states have call successors, (84), 84 states have call predecessors, (84), 343 states have return successors, (2460), 181 states have call predecessors, (2460), 83 states have call successors, (2460) [2023-04-01 23:24:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18528 states to 18528 states and 23268 transitions. [2023-04-01 23:24:43,796 INFO L78 Accepts]: Start accepts. Automaton has 18528 states and 23268 transitions. Word has length 350 [2023-04-01 23:24:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:24:43,796 INFO L495 AbstractCegarLoop]: Abstraction has 18528 states and 23268 transitions. [2023-04-01 23:24:43,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:24:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18528 states and 23268 transitions. [2023-04-01 23:24:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-04-01 23:24:43,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:24:43,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:24:43,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 23:24:44,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:44,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:24:44,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:24:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2100038191, now seen corresponding path program 1 times [2023-04-01 23:24:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:24:44,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605260261] [2023-04-01 23:24:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:44,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:24:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:44,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:24:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:44,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:24:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:44,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:24:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:24:45,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:24:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605260261] [2023-04-01 23:24:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605260261] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:45,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178135184] [2023-04-01 23:24:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:24:45,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:24:45,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:24:45,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:24:45,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 23:24:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:24:45,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 23:24:45,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:24:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-04-01 23:24:45,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 23:24:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178135184] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:24:46,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 23:24:46,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-01 23:24:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971839810] [2023-04-01 23:24:46,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 23:24:46,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 23:24:46,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:24:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 23:24:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-04-01 23:24:46,738 INFO L87 Difference]: Start difference. First operand 18528 states and 23268 transitions. Second operand has 11 states, 11 states have (on average 51.18181818181818) internal successors, (563), 8 states have internal predecessors, (563), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:24:49,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:24:51,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:24:53,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:24:55,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:24:57,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:00,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:03,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:05,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:07,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:10,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:12,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:14,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:16,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:18,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:20,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:22,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:24,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:27,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:28,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:31,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:34,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:36,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:39,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:41,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:44,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:46,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:48,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:50,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:52,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:54,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:25:57,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:00,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:03,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:05,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:08,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:11,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:14,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:16,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:19,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:21,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:23,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:25,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:28,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:30,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:33,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:34,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:37,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:39,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:42,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:44,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:47,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:50,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:52,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:54,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:56,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:26:59,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:02,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:04,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:06,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:09,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:11,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:13,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:15,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:18,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:20,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:22,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:25,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:27,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:29,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:33,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:35,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-04-01 23:27:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:36,058 INFO L93 Difference]: Finished difference Result 55047 states and 72932 transitions. [2023-04-01 23:27:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 23:27:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 51.18181818181818) internal successors, (563), 8 states have internal predecessors, (563), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 403 [2023-04-01 23:27:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:36,187 INFO L225 Difference]: With dead ends: 55047 [2023-04-01 23:27:36,187 INFO L226 Difference]: Without dead ends: 34708 [2023-04-01 23:27:36,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 712 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-04-01 23:27:36,228 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2617 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 6497 mSolverCounterSat, 1361 mSolverCounterUnsat, 65 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 7923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 6497 IncrementalHoareTripleChecker+Invalid, 65 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:36,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2624 Valid, 414 Invalid, 7923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 6497 Invalid, 65 Unknown, 0 Unchecked, 168.6s Time] [2023-04-01 23:27:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34708 states. [2023-04-01 23:27:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34708 to 31349. [2023-04-01 23:27:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31349 states, 30705 states have (on average 1.134408076860446) internal successors, (34832), 30937 states have internal predecessors, (34832), 142 states have call successors, (142), 142 states have call predecessors, (142), 501 states have return successors, (4379), 269 states have call predecessors, (4379), 141 states have call successors, (4379) [2023-04-01 23:27:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31349 states to 31349 states and 39353 transitions. [2023-04-01 23:27:36,983 INFO L78 Accepts]: Start accepts. Automaton has 31349 states and 39353 transitions. Word has length 403 [2023-04-01 23:27:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:36,984 INFO L495 AbstractCegarLoop]: Abstraction has 31349 states and 39353 transitions. [2023-04-01 23:27:36,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 51.18181818181818) internal successors, (563), 8 states have internal predecessors, (563), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 23:27:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31349 states and 39353 transitions. [2023-04-01 23:27:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-04-01 23:27:37,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:37,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2023-04-01 23:27:37,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 23:27:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:37,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:27:37,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:27:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1216669285, now seen corresponding path program 1 times [2023-04-01 23:27:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:27:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209962878] [2023-04-01 23:27:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:27:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:37,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:27:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:37,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:27:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:37,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:27:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:38,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2023-04-01 23:27:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 262 proven. 106 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 23:27:38,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:27:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209962878] [2023-04-01 23:27:38,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209962878] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:27:38,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855372675] [2023-04-01 23:27:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:27:38,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:27:38,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 23:27:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:38,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:27:38,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:27:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-04-01 23:27:38,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:27:38,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855372675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:27:38,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:27:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 23:27:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566484190] [2023-04-01 23:27:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:27:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:27:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:27:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:27:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:27:38,692 INFO L87 Difference]: Start difference. First operand 31349 states and 39353 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:27:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:40,747 INFO L93 Difference]: Finished difference Result 64871 states and 81054 transitions. [2023-04-01 23:27:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:27:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 510 [2023-04-01 23:27:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:40,850 INFO L225 Difference]: With dead ends: 64871 [2023-04-01 23:27:40,850 INFO L226 Difference]: Without dead ends: 33528 [2023-04-01 23:27:40,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 23:27:40,894 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 395 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:40,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 469 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:27:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33528 states. [2023-04-01 23:27:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33528 to 31786. [2023-04-01 23:27:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31786 states, 31136 states have (on average 1.1330935251798562) internal successors, (35280), 31370 states have internal predecessors, (35280), 144 states have call successors, (144), 144 states have call predecessors, (144), 505 states have return successors, (4415), 271 states have call predecessors, (4415), 143 states have call successors, (4415) [2023-04-01 23:27:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31786 states to 31786 states and 39839 transitions. [2023-04-01 23:27:41,577 INFO L78 Accepts]: Start accepts. Automaton has 31786 states and 39839 transitions. Word has length 510 [2023-04-01 23:27:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:41,578 INFO L495 AbstractCegarLoop]: Abstraction has 31786 states and 39839 transitions. [2023-04-01 23:27:41,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:27:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 31786 states and 39839 transitions. [2023-04-01 23:27:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-04-01 23:27:41,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:41,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 23:27:41,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 23:27:41,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:41,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:27:41,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:27:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 868141907, now seen corresponding path program 1 times [2023-04-01 23:27:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:27:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822101042] [2023-04-01 23:27:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:27:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:27:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:27:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:27:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2023-04-01 23:27:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-04-01 23:27:42,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:27:42,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822101042] [2023-04-01 23:27:42,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822101042] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:27:42,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213194512] [2023-04-01 23:27:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:42,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:27:42,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:27:42,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 23:27:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:42,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 23:27:42,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:27:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 23:27:42,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:27:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213194512] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:27:42,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:27:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:27:42,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419764288] [2023-04-01 23:27:42,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:27:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:27:42,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:27:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:27:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:27:42,568 INFO L87 Difference]: Start difference. First operand 31786 states and 39839 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:27:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:45,021 INFO L93 Difference]: Finished difference Result 74040 states and 93586 transitions. [2023-04-01 23:27:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:27:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 515 [2023-04-01 23:27:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:45,125 INFO L225 Difference]: With dead ends: 74040 [2023-04-01 23:27:45,125 INFO L226 Difference]: Without dead ends: 40457 [2023-04-01 23:27:45,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:27:45,170 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 504 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:45,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 794 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 23:27:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40457 states. [2023-04-01 23:27:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40457 to 39149. [2023-04-01 23:27:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39149 states, 38427 states have (on average 1.101543185780831) internal successors, (42329), 38667 states have internal predecessors, (42329), 178 states have call successors, (178), 178 states have call predecessors, (178), 543 states have return successors, (4762), 303 states have call predecessors, (4762), 177 states have call successors, (4762) [2023-04-01 23:27:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39149 states to 39149 states and 47269 transitions. [2023-04-01 23:27:46,054 INFO L78 Accepts]: Start accepts. Automaton has 39149 states and 47269 transitions. Word has length 515 [2023-04-01 23:27:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 39149 states and 47269 transitions. [2023-04-01 23:27:46,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:27:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39149 states and 47269 transitions. [2023-04-01 23:27:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-04-01 23:27:46,074 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:46,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2023-04-01 23:27:46,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 23:27:46,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 23:27:46,281 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:27:46,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:27:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1463845583, now seen corresponding path program 1 times [2023-04-01 23:27:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:27:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573745563] [2023-04-01 23:27:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:27:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:46,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:27:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:46,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:27:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:27:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:46,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-04-01 23:27:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 177 proven. 3 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-04-01 23:27:46,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:27:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573745563] [2023-04-01 23:27:46,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573745563] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:27:46,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560288898] [2023-04-01 23:27:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:46,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:27:46,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:27:46,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 23:27:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:47,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:27:47,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:27:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-04-01 23:27:47,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:27:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560288898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:27:47,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:27:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:27:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444389803] [2023-04-01 23:27:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:27:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:27:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:27:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:27:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:27:47,488 INFO L87 Difference]: Start difference. First operand 39149 states and 47269 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:27:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:49,839 INFO L93 Difference]: Finished difference Result 85714 states and 104323 transitions. [2023-04-01 23:27:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:27:49,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 520 [2023-04-01 23:27:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:49,940 INFO L225 Difference]: With dead ends: 85714 [2023-04-01 23:27:49,940 INFO L226 Difference]: Without dead ends: 46111 [2023-04-01 23:27:49,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 527 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:27:49,985 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 437 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:49,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 361 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 23:27:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46111 states. [2023-04-01 23:27:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46111 to 42634. [2023-04-01 23:27:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42634 states, 41869 states have (on average 1.1005517208435835) internal successors, (46079), 42115 states have internal predecessors, (46079), 194 states have call successors, (194), 194 states have call predecessors, (194), 570 states have return successors, (5326), 324 states have call predecessors, (5326), 193 states have call successors, (5326) [2023-04-01 23:27:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42634 states to 42634 states and 51599 transitions. [2023-04-01 23:27:50,836 INFO L78 Accepts]: Start accepts. Automaton has 42634 states and 51599 transitions. Word has length 520 [2023-04-01 23:27:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:50,837 INFO L495 AbstractCegarLoop]: Abstraction has 42634 states and 51599 transitions. [2023-04-01 23:27:50,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 23:27:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 42634 states and 51599 transitions. [2023-04-01 23:27:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2023-04-01 23:27:50,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:50,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:27:50,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 23:27:51,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:51,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:27:51,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:27:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2011808924, now seen corresponding path program 1 times [2023-04-01 23:27:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:27:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023232082] [2023-04-01 23:27:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:27:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:27:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:27:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:27:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2023-04-01 23:27:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:27:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-04-01 23:27:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:27:51,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023232082] [2023-04-01 23:27:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023232082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:27:51,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 23:27:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 23:27:51,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258422283] [2023-04-01 23:27:51,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:27:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 23:27:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:27:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 23:27:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:27:51,783 INFO L87 Difference]: Start difference. First operand 42634 states and 51599 transitions. Second operand has 6 states, 6 states have (on average 66.0) internal successors, (396), 4 states have internal predecessors, (396), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:27:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:53,966 INFO L93 Difference]: Finished difference Result 83921 states and 101711 transitions. [2023-04-01 23:27:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 23:27:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 4 states have internal predecessors, (396), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 596 [2023-04-01 23:27:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:54,061 INFO L225 Difference]: With dead ends: 83921 [2023-04-01 23:27:54,062 INFO L226 Difference]: Without dead ends: 41291 [2023-04-01 23:27:54,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 23:27:54,115 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1744 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:54,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1744 Valid, 109 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 23:27:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41291 states. [2023-04-01 23:27:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41291 to 39974. [2023-04-01 23:27:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39974 states, 39251 states have (on average 1.1039209192122494) internal successors, (43330), 39486 states have internal predecessors, (43330), 182 states have call successors, (182), 182 states have call predecessors, (182), 540 states have return successors, (4996), 305 states have call predecessors, (4996), 181 states have call successors, (4996) [2023-04-01 23:27:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39974 states to 39974 states and 48508 transitions. [2023-04-01 23:27:54,968 INFO L78 Accepts]: Start accepts. Automaton has 39974 states and 48508 transitions. Word has length 596 [2023-04-01 23:27:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:54,969 INFO L495 AbstractCegarLoop]: Abstraction has 39974 states and 48508 transitions. [2023-04-01 23:27:54,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 4 states have internal predecessors, (396), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 23:27:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39974 states and 48508 transitions. [2023-04-01 23:27:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2023-04-01 23:27:55,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:55,016 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:27:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 23:27:55,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:27:55,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:27:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2122596879, now seen corresponding path program 1 times [2023-04-01 23:27:55,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:27:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821123840] [2023-04-01 23:27:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:27:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:55,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:27:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:55,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:27:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:55,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:27:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:27:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:55,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2023-04-01 23:27:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:27:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-04-01 23:27:56,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:27:56,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821123840] [2023-04-01 23:27:56,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821123840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:27:56,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471510447] [2023-04-01 23:27:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:27:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:27:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:27:56,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:27:56,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 23:27:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:27:56,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 23:27:56,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:27:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-04-01 23:27:56,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:27:56,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471510447] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:27:56,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:27:56,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:27:56,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228231664] [2023-04-01 23:27:56,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:27:56,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:27:56,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:27:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:27:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:27:56,418 INFO L87 Difference]: Start difference. First operand 39974 states and 48508 transitions. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:27:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:27:58,779 INFO L93 Difference]: Finished difference Result 91355 states and 111136 transitions. [2023-04-01 23:27:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:27:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 642 [2023-04-01 23:27:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:27:58,912 INFO L225 Difference]: With dead ends: 91355 [2023-04-01 23:27:58,913 INFO L226 Difference]: Without dead ends: 50940 [2023-04-01 23:27:58,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:27:58,968 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 411 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 23:27:58,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 890 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 23:27:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50940 states. [2023-04-01 23:27:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50940 to 50498. [2023-04-01 23:27:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50498 states, 49632 states have (on average 1.0948984526112187) internal successors, (54342), 49901 states have internal predecessors, (54342), 230 states have call successors, (230), 230 states have call predecessors, (230), 635 states have return successors, (6163), 366 states have call predecessors, (6163), 229 states have call successors, (6163) [2023-04-01 23:27:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50498 states to 50498 states and 60735 transitions. [2023-04-01 23:27:59,869 INFO L78 Accepts]: Start accepts. Automaton has 50498 states and 60735 transitions. Word has length 642 [2023-04-01 23:27:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:27:59,870 INFO L495 AbstractCegarLoop]: Abstraction has 50498 states and 60735 transitions. [2023-04-01 23:27:59,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:27:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 50498 states and 60735 transitions. [2023-04-01 23:27:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-04-01 23:27:59,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:27:59,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:27:59,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 23:28:00,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 23:28:00,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:28:00,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:28:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash 606373713, now seen corresponding path program 1 times [2023-04-01 23:28:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:28:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637039961] [2023-04-01 23:28:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:28:00,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:28:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:28:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:28:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:28:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:28:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:28:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 177 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 23:28:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:28:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637039961] [2023-04-01 23:28:00,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637039961] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:28:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225277627] [2023-04-01 23:28:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:28:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:28:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:28:00,989 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:28:00,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 23:28:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:01,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:28:01,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:28:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 23:28:01,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:28:01,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225277627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:28:01,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:28:01,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 23:28:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038567285] [2023-04-01 23:28:01,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:28:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:28:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:28:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:28:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:28:01,324 INFO L87 Difference]: Start difference. First operand 50498 states and 60735 transitions. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:28:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 23:28:03,412 INFO L93 Difference]: Finished difference Result 100990 states and 121464 transitions. [2023-04-01 23:28:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 23:28:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 648 [2023-04-01 23:28:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 23:28:03,509 INFO L225 Difference]: With dead ends: 100990 [2023-04-01 23:28:03,510 INFO L226 Difference]: Without dead ends: 50498 [2023-04-01 23:28:03,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 23:28:03,563 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 437 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 23:28:03,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 749 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 23:28:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50498 states. [2023-04-01 23:28:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50498 to 48761. [2023-04-01 23:28:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48761 states, 47913 states have (on average 1.075532736418091) internal successors, (51532), 48181 states have internal predecessors, (51532), 222 states have call successors, (222), 222 states have call predecessors, (222), 625 states have return successors, (4768), 357 states have call predecessors, (4768), 221 states have call successors, (4768) [2023-04-01 23:28:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48761 states to 48761 states and 56522 transitions. [2023-04-01 23:28:04,406 INFO L78 Accepts]: Start accepts. Automaton has 48761 states and 56522 transitions. Word has length 648 [2023-04-01 23:28:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 23:28:04,406 INFO L495 AbstractCegarLoop]: Abstraction has 48761 states and 56522 transitions. [2023-04-01 23:28:04,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 23:28:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48761 states and 56522 transitions. [2023-04-01 23:28:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-04-01 23:28:04,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 23:28:04,438 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 23:28:04,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 23:28:04,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 23:28:04,644 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 23:28:04,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 23:28:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1267052548, now seen corresponding path program 1 times [2023-04-01 23:28:04,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 23:28:04,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657414391] [2023-04-01 23:28:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:28:04,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 23:28:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 23:28:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 23:28:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 23:28:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2023-04-01 23:28:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 23:28:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 591 [2023-04-01 23:28:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 237 proven. 4 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-04-01 23:28:05,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 23:28:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657414391] [2023-04-01 23:28:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657414391] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 23:28:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036877266] [2023-04-01 23:28:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 23:28:05,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 23:28:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 23:28:05,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 23:28:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 23:28:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 23:28:05,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 23:28:05,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 23:28:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-04-01 23:28:05,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 23:28:05,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036877266] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 23:28:05,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 23:28:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 23:28:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082035079] [2023-04-01 23:28:05,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 23:28:05,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 23:28:05,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 23:28:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 23:28:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 23:28:05,928 INFO L87 Difference]: Start difference. First operand 48761 states and 56522 transitions. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)