/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 22:29:39,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 22:29:39,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 22:29:39,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 22:29:39,427 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 22:29:39,448 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 22:29:39,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 22:29:39,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 22:29:39,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 22:29:39,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 22:29:39,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 22:29:39,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 22:29:39,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 22:29:39,450 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 22:29:39,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 22:29:39,450 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 22:29:39,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 22:29:39,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 22:29:39,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 22:29:39,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:29:39,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 22:29:39,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 22:29:39,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 22:29:39,455 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 22:29:39,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 22:29:39,456 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 22:29:39,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 22:29:39,456 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 22:29:39,456 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 22:29:39,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 22:29:39,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 22:29:39,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 22:29:39,663 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 22:29:39,663 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 22:29:39,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2023-04-01 22:29:40,685 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 22:29:41,037 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 22:29:41,038 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2023-04-01 22:29:41,059 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2573fa49a/ac42ba0cab4341c1abb5703365a1deab/FLAGc1a99f13a [2023-04-01 22:29:41,071 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2573fa49a/ac42ba0cab4341c1abb5703365a1deab [2023-04-01 22:29:41,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 22:29:41,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 22:29:41,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 22:29:41,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 22:29:41,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 22:29:41,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:41" (1/1) ... [2023-04-01 22:29:41,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d61819b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:41, skipping insertion in model container [2023-04-01 22:29:41,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:41" (1/1) ... [2023-04-01 22:29:41,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 22:29:41,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 22:29:41,291 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2023-04-01 22:29:41,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:29:41,794 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 22:29:41,808 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c[2005,2018] [2023-04-01 22:29:42,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 22:29:42,087 INFO L208 MainTranslator]: Completed translation [2023-04-01 22:29:42,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42 WrapperNode [2023-04-01 22:29:42,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 22:29:42,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 22:29:42,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 22:29:42,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 22:29:42,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 22:29:42,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 22:29:42,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 22:29:42,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 22:29:42,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (1/1) ... [2023-04-01 22:29:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 22:29:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:29:42,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 22:29:42,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 22:29:42,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 22:29:42,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 22:29:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 22:29:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 22:29:42,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 22:29:42,314 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 22:29:42,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 22:29:42,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 22:29:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 22:29:42,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 22:29:42,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 22:29:42,383 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 22:29:42,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 22:29:45,362 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 22:29:45,374 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 22:29:45,375 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 22:29:45,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:45 BoogieIcfgContainer [2023-04-01 22:29:45,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 22:29:45,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 22:29:45,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 22:29:45,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 22:29:45,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:29:41" (1/3) ... [2023-04-01 22:29:45,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738aa6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:45, skipping insertion in model container [2023-04-01 22:29:45,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:42" (2/3) ... [2023-04-01 22:29:45,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738aa6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:45, skipping insertion in model container [2023-04-01 22:29:45,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:45" (3/3) ... [2023-04-01 22:29:45,381 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2023-04-01 22:29:45,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 22:29:45,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 22:29:45,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 22:29:45,434 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;@502c308b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 22:29:45,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 22:29:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 22:29:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 22:29:45,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:29:45,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:29:45,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:29:45,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:29:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1376154616, now seen corresponding path program 1 times [2023-04-01 22:29:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:29:45,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934044251] [2023-04-01 22:29:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:29:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:29:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:29:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:29:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:29:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934044251] [2023-04-01 22:29:45,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934044251] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:29:45,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:29:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 22:29:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621105255] [2023-04-01 22:29:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:29:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 22:29:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:29:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 22:29:45,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 22:29:45,724 INFO L87 Difference]: Start difference. First operand has 839 states, 825 states have (on average 1.907878787878788) internal successors, (1574), 826 states have internal predecessors, (1574), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:29:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:29:51,958 INFO L93 Difference]: Finished difference Result 3253 states and 6294 transitions. [2023-04-01 22:29:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 22:29:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2023-04-01 22:29:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:29:51,983 INFO L225 Difference]: With dead ends: 3253 [2023-04-01 22:29:51,984 INFO L226 Difference]: Without dead ends: 2346 [2023-04-01 22:29:51,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:29:51,992 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4057 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 1386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4057 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 6296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1386 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:29:51,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4057 Valid, 65 Invalid, 6296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1386 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-04-01 22:29:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2023-04-01 22:29:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331. [2023-04-01 22:29:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2295 states have (on average 1.6226579520697169) internal successors, (3724), 2297 states have internal predecessors, (3724), 14 states have call successors, (14), 14 states have call predecessors, (14), 21 states have return successors, (49), 19 states have call predecessors, (49), 13 states have call successors, (49) [2023-04-01 22:29:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3787 transitions. [2023-04-01 22:29:52,085 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3787 transitions. Word has length 19 [2023-04-01 22:29:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:29:52,085 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 3787 transitions. [2023-04-01 22:29:52,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 22:29:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3787 transitions. [2023-04-01 22:29:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 22:29:52,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:29:52,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:29:52,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 22:29:52,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:29:52,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:29:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash 716404943, now seen corresponding path program 1 times [2023-04-01 22:29:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:29:52,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011974123] [2023-04-01 22:29:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:29:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:29:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:52,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:29:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:29:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:29:52,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:29:52,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011974123] [2023-04-01 22:29:52,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011974123] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:29:52,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114046934] [2023-04-01 22:29:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:29:52,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:29:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:29:52,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:29:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 22:29:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:52,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:29:52,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:29:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:29:52,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:29:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114046934] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:29:52,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:29:52,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 22:29:52,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668589582] [2023-04-01 22:29:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:29:52,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:29:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:29:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:29:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:29:52,626 INFO L87 Difference]: Start difference. First operand 2331 states and 3787 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:29:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:29:55,227 INFO L93 Difference]: Finished difference Result 6979 states and 11460 transitions. [2023-04-01 22:29:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:29:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 94 [2023-04-01 22:29:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:29:55,247 INFO L225 Difference]: With dead ends: 6979 [2023-04-01 22:29:55,247 INFO L226 Difference]: Without dead ends: 4654 [2023-04-01 22:29:55,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:29:55,254 INFO L413 NwaCegarLoop]: 1185 mSDtfsCounter, 767 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:29:55,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1217 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 22:29:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2023-04-01 22:29:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2023-04-01 22:29:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4586 states have (on average 1.5248582642825992) internal successors, (6993), 4590 states have internal predecessors, (6993), 26 states have call successors, (26), 26 states have call predecessors, (26), 41 states have return successors, (165), 37 states have call predecessors, (165), 25 states have call successors, (165) [2023-04-01 22:29:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 7184 transitions. [2023-04-01 22:29:55,349 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 7184 transitions. Word has length 94 [2023-04-01 22:29:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:29:55,349 INFO L495 AbstractCegarLoop]: Abstraction has 4654 states and 7184 transitions. [2023-04-01 22:29:55,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:29:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 7184 transitions. [2023-04-01 22:29:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 22:29:55,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:29:55,355 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:29:55,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 22:29:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:29:55,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:29:55,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:29:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -803015401, now seen corresponding path program 1 times [2023-04-01 22:29:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:29:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104841148] [2023-04-01 22:29:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:29:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:29:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:29:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:29:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:29:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:29:55,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:29:55,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104841148] [2023-04-01 22:29:55,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104841148] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:29:55,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:29:55,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:29:55,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063157514] [2023-04-01 22:29:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:29:55,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:29:55,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:29:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:29:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:29:55,927 INFO L87 Difference]: Start difference. First operand 4654 states and 7184 transitions. Second operand has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:00,918 INFO L93 Difference]: Finished difference Result 14200 states and 22515 transitions. [2023-04-01 22:30:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 22:30:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 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 98 [2023-04-01 22:30:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:00,948 INFO L225 Difference]: With dead ends: 14200 [2023-04-01 22:30:00,949 INFO L226 Difference]: Without dead ends: 9552 [2023-04-01 22:30:00,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:30:00,959 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3140 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5703 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3140 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 5703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3140 Valid, 118 Invalid, 6641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 5703 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 22:30:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9552 states. [2023-04-01 22:30:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9552 to 9439. [2023-04-01 22:30:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9439 states, 9254 states have (on average 1.3996109790360924) internal successors, (12952), 9282 states have internal predecessors, (12952), 50 states have call successors, (50), 50 states have call predecessors, (50), 134 states have return successors, (679), 106 states have call predecessors, (679), 49 states have call successors, (679) [2023-04-01 22:30:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9439 states to 9439 states and 13681 transitions. [2023-04-01 22:30:01,161 INFO L78 Accepts]: Start accepts. Automaton has 9439 states and 13681 transitions. Word has length 98 [2023-04-01 22:30:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:01,162 INFO L495 AbstractCegarLoop]: Abstraction has 9439 states and 13681 transitions. [2023-04-01 22:30:01,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 9439 states and 13681 transitions. [2023-04-01 22:30:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-01 22:30:01,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:01,165 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:30:01,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 22:30:01,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:01,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1081625500, now seen corresponding path program 1 times [2023-04-01 22:30:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:01,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457923207] [2023-04-01 22:30:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:01,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457923207] [2023-04-01 22:30:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457923207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:30:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:30:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 22:30:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607456650] [2023-04-01 22:30:01,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:30:01,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 22:30:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 22:30:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:30:01,397 INFO L87 Difference]: Start difference. First operand 9439 states and 13681 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:06,707 INFO L93 Difference]: Finished difference Result 29046 states and 44534 transitions. [2023-04-01 22:30:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 22:30:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 109 [2023-04-01 22:30:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:06,770 INFO L225 Difference]: With dead ends: 29046 [2023-04-01 22:30:06,770 INFO L226 Difference]: Without dead ends: 19613 [2023-04-01 22:30:06,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:30:06,789 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 4048 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 5601 mSolverCounterSat, 1155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4048 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 6756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1155 IncrementalHoareTripleChecker+Valid, 5601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:06,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4048 Valid, 141 Invalid, 6756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1155 Valid, 5601 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-04-01 22:30:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19613 states. [2023-04-01 22:30:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19613 to 19395. [2023-04-01 22:30:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19395 states, 18827 states have (on average 1.2679131035215383) internal successors, (23871), 18964 states have internal predecessors, (23871), 98 states have call successors, (98), 98 states have call predecessors, (98), 469 states have return successors, (2813), 332 states have call predecessors, (2813), 97 states have call successors, (2813) [2023-04-01 22:30:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19395 states to 19395 states and 26782 transitions. [2023-04-01 22:30:07,189 INFO L78 Accepts]: Start accepts. Automaton has 19395 states and 26782 transitions. Word has length 109 [2023-04-01 22:30:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:07,190 INFO L495 AbstractCegarLoop]: Abstraction has 19395 states and 26782 transitions. [2023-04-01 22:30:07,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 19395 states and 26782 transitions. [2023-04-01 22:30:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-01 22:30:07,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:07,195 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 22:30:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 22:30:07,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:07,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -877813381, now seen corresponding path program 1 times [2023-04-01 22:30:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:07,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644220853] [2023-04-01 22:30:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:07,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644220853] [2023-04-01 22:30:07,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644220853] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:30:07,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 22:30:07,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 22:30:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641834996] [2023-04-01 22:30:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:30:07,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 22:30:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 22:30:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 22:30:07,416 INFO L87 Difference]: Start difference. First operand 19395 states and 26782 transitions. Second operand has 8 states, 7 states have (on average 18.0) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:14,048 INFO L93 Difference]: Finished difference Result 72141 states and 106505 transitions. [2023-04-01 22:30:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 22:30:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.0) internal successors, (126), 5 states have internal predecessors, (126), 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 132 [2023-04-01 22:30:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:14,325 INFO L225 Difference]: With dead ends: 72141 [2023-04-01 22:30:14,326 INFO L226 Difference]: Without dead ends: 52752 [2023-04-01 22:30:14,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-04-01 22:30:14,420 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4516 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6966 mSolverCounterSat, 2471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4516 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 9437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2471 IncrementalHoareTripleChecker+Valid, 6966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:14,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4516 Valid, 128 Invalid, 9437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2471 Valid, 6966 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 22:30:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52752 states. [2023-04-01 22:30:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52752 to 49625. [2023-04-01 22:30:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49625 states, 48335 states have (on average 1.2070342401986138) internal successors, (58342), 48642 states have internal predecessors, (58342), 250 states have call successors, (250), 250 states have call predecessors, (250), 1039 states have return successors, (9545), 732 states have call predecessors, (9545), 249 states have call successors, (9545) [2023-04-01 22:30:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49625 states to 49625 states and 68137 transitions. [2023-04-01 22:30:15,622 INFO L78 Accepts]: Start accepts. Automaton has 49625 states and 68137 transitions. Word has length 132 [2023-04-01 22:30:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:15,623 INFO L495 AbstractCegarLoop]: Abstraction has 49625 states and 68137 transitions. [2023-04-01 22:30:15,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.0) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 22:30:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 49625 states and 68137 transitions. [2023-04-01 22:30:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 22:30:15,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:15,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:30:15,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 22:30:15,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:15,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1485823760, now seen corresponding path program 1 times [2023-04-01 22:30:15,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:15,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376607543] [2023-04-01 22:30:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:15,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:15,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:15,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376607543] [2023-04-01 22:30:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376607543] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:30:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175196883] [2023-04-01 22:30:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:15,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:30:15,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:30:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 22:30:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:15,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:30:15,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:30:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:15,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:30:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175196883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:30:15,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:30:15,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 22:30:15,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362329597] [2023-04-01 22:30:15,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:30:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:30:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:15,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:30:15,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:30:15,994 INFO L87 Difference]: Start difference. First operand 49625 states and 68137 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:30:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:19,310 INFO L93 Difference]: Finished difference Result 121114 states and 170934 transitions. [2023-04-01 22:30:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:30:19,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 167 [2023-04-01 22:30:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:19,665 INFO L225 Difference]: With dead ends: 121114 [2023-04-01 22:30:19,665 INFO L226 Difference]: Without dead ends: 71495 [2023-04-01 22:30:19,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 22:30:19,801 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 812 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:19,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 162 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 2292 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 22:30:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71495 states. [2023-04-01 22:30:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71495 to 67630. [2023-04-01 22:30:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67630 states, 66012 states have (on average 1.2232927346543052) internal successors, (80752), 66387 states have internal predecessors, (80752), 342 states have call successors, (342), 342 states have call predecessors, (342), 1275 states have return successors, (15979), 900 states have call predecessors, (15979), 341 states have call successors, (15979) [2023-04-01 22:30:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67630 states to 67630 states and 97073 transitions. [2023-04-01 22:30:21,457 INFO L78 Accepts]: Start accepts. Automaton has 67630 states and 97073 transitions. Word has length 167 [2023-04-01 22:30:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:21,458 INFO L495 AbstractCegarLoop]: Abstraction has 67630 states and 97073 transitions. [2023-04-01 22:30:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 22:30:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 67630 states and 97073 transitions. [2023-04-01 22:30:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-04-01 22:30:21,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:21,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:30:21,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 22:30:21,676 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,SelfDestructingSolverStorable5 [2023-04-01 22:30:21,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:21,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 315892111, now seen corresponding path program 1 times [2023-04-01 22:30:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191436184] [2023-04-01 22:30:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:30:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:30:22,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191436184] [2023-04-01 22:30:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191436184] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:30:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122989473] [2023-04-01 22:30:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:22,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:30:22,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:30:22,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 22:30:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:22,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:30:22,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:30:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:22,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:30:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:22,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122989473] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:30:22,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:30:22,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:30:22,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191479090] [2023-04-01 22:30:22,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:30:22,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:30:22,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:30:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:30:22,588 INFO L87 Difference]: Start difference. First operand 67630 states and 97073 transitions. Second operand has 12 states, 12 states have (on average 35.583333333333336) internal successors, (427), 10 states have internal predecessors, (427), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:30:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:30,250 INFO L93 Difference]: Finished difference Result 139441 states and 203553 transitions. [2023-04-01 22:30:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 22:30:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 35.583333333333336) internal successors, (427), 10 states have internal predecessors, (427), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 254 [2023-04-01 22:30:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:30,643 INFO L225 Difference]: With dead ends: 139441 [2023-04-01 22:30:30,643 INFO L226 Difference]: Without dead ends: 71817 [2023-04-01 22:30:30,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 510 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2023-04-01 22:30:30,838 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 5513 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 13677 mSolverCounterSat, 1502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5513 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 15179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1502 IncrementalHoareTripleChecker+Valid, 13677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:30,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5513 Valid, 278 Invalid, 15179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1502 Valid, 13677 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 22:30:30,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71817 states. [2023-04-01 22:30:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71817 to 71624. [2023-04-01 22:30:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71624 states, 69612 states have (on average 1.182439809228294) internal successors, (82312), 70147 states have internal predecessors, (82312), 358 states have call successors, (358), 358 states have call predecessors, (358), 1653 states have return successors, (15362), 1118 states have call predecessors, (15362), 357 states have call successors, (15362) [2023-04-01 22:30:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71624 states to 71624 states and 98032 transitions. [2023-04-01 22:30:32,300 INFO L78 Accepts]: Start accepts. Automaton has 71624 states and 98032 transitions. Word has length 254 [2023-04-01 22:30:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:32,301 INFO L495 AbstractCegarLoop]: Abstraction has 71624 states and 98032 transitions. [2023-04-01 22:30:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.583333333333336) internal successors, (427), 10 states have internal predecessors, (427), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:30:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 71624 states and 98032 transitions. [2023-04-01 22:30:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-04-01 22:30:32,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:32,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:30:32,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 22:30:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:32,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:32,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1484473303, now seen corresponding path program 1 times [2023-04-01 22:30:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:32,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180382776] [2023-04-01 22:30:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 22:30:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 22:30:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180382776] [2023-04-01 22:30:33,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180382776] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:30:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270361197] [2023-04-01 22:30:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:30:33,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:30:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 22:30:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:33,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:30:33,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:30:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-04-01 22:30:33,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:30:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270361197] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:30:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:30:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 22:30:33,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600356944] [2023-04-01 22:30:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:30:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:30:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:30:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:30:33,272 INFO L87 Difference]: Start difference. First operand 71624 states and 98032 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 22:30:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:36,948 INFO L93 Difference]: Finished difference Result 171068 states and 240642 transitions. [2023-04-01 22:30:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:30:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 258 [2023-04-01 22:30:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:37,378 INFO L225 Difference]: With dead ends: 171068 [2023-04-01 22:30:37,378 INFO L226 Difference]: Without dead ends: 99450 [2023-04-01 22:30:37,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 22:30:37,488 INFO L413 NwaCegarLoop]: 918 mSDtfsCounter, 831 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2359 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 2359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:37,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 950 Invalid, 3142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 2359 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 22:30:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99450 states. [2023-04-01 22:30:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99450 to 98681. [2023-04-01 22:30:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98681 states, 96304 states have (on average 1.1930968599435121) internal successors, (114900), 96882 states have internal predecessors, (114900), 498 states have call successors, (498), 498 states have call predecessors, (498), 1878 states have return successors, (23450), 1300 states have call predecessors, (23450), 497 states have call successors, (23450) [2023-04-01 22:30:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98681 states to 98681 states and 138848 transitions. [2023-04-01 22:30:39,265 INFO L78 Accepts]: Start accepts. Automaton has 98681 states and 138848 transitions. Word has length 258 [2023-04-01 22:30:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:39,265 INFO L495 AbstractCegarLoop]: Abstraction has 98681 states and 138848 transitions. [2023-04-01 22:30:39,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 22:30:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 98681 states and 138848 transitions. [2023-04-01 22:30:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-04-01 22:30:39,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:39,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:30:39,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 22:30:39,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:39,474 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:39,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1878836701, now seen corresponding path program 1 times [2023-04-01 22:30:39,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:39,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634836844] [2023-04-01 22:30:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:39,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:30:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:39,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:30:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:39,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-04-01 22:30:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 22:30:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:30:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634836844] [2023-04-01 22:30:40,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634836844] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:30:40,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375915500] [2023-04-01 22:30:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:30:40,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 22:30:40,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 22:30:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:30:40,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:30:40,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:30:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:40,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:30:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 22:30:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375915500] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:30:40,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:30:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 22:30:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000466275] [2023-04-01 22:30:40,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:30:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 22:30:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:30:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 22:30:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-04-01 22:30:40,614 INFO L87 Difference]: Start difference. First operand 98681 states and 138848 transitions. Second operand has 12 states, 12 states have (on average 43.583333333333336) internal successors, (523), 10 states have internal predecessors, (523), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:30:56,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:30:56,027 INFO L93 Difference]: Finished difference Result 223713 states and 326389 transitions. [2023-04-01 22:30:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 22:30:56,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 43.583333333333336) internal successors, (523), 10 states have internal predecessors, (523), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 288 [2023-04-01 22:30:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:30:56,635 INFO L225 Difference]: With dead ends: 223713 [2023-04-01 22:30:56,635 INFO L226 Difference]: Without dead ends: 121970 [2023-04-01 22:30:56,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 598 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=586, Invalid=2606, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 22:30:56,748 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 7843 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 24298 mSolverCounterSat, 3355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7843 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 27653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3355 IncrementalHoareTripleChecker+Valid, 24298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:30:56,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7843 Valid, 576 Invalid, 27653 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3355 Valid, 24298 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2023-04-01 22:30:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121970 states. [2023-04-01 22:30:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121970 to 110823. [2023-04-01 22:30:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110823 states, 107841 states have (on average 1.0675346111404753) internal successors, (115124), 108611 states have internal predecessors, (115124), 671 states have call successors, (671), 554 states have call predecessors, (671), 2310 states have return successors, (16347), 1657 states have call predecessors, (16347), 670 states have call successors, (16347) [2023-04-01 22:30:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110823 states to 110823 states and 132142 transitions. [2023-04-01 22:30:59,131 INFO L78 Accepts]: Start accepts. Automaton has 110823 states and 132142 transitions. Word has length 288 [2023-04-01 22:30:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:30:59,131 INFO L495 AbstractCegarLoop]: Abstraction has 110823 states and 132142 transitions. [2023-04-01 22:30:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 43.583333333333336) internal successors, (523), 10 states have internal predecessors, (523), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-01 22:30:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 110823 states and 132142 transitions. [2023-04-01 22:30:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-04-01 22:30:59,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:30:59,183 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:30:59,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 22:30:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:30:59,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:30:59,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:30:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1144507411, now seen corresponding path program 1 times [2023-04-01 22:30:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:30:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948521773] [2023-04-01 22:30:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:30:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:30:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:00,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:31:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:00,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:31:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:00,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:31:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:00,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2023-04-01 22:31:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:31:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 258 proven. 10 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-04-01 22:31:01,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:31:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948521773] [2023-04-01 22:31:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948521773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:31:01,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816406794] [2023-04-01 22:31:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:01,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:31:01,237 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 22:31:01,237 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 22:31:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:01,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:31:01,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:31:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 22:31:02,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:31:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 22:31:06,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816406794] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:31:06,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:31:06,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 6] total 15 [2023-04-01 22:31:06,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739805648] [2023-04-01 22:31:06,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:31:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:31:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:31:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:31:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:31:06,995 INFO L87 Difference]: Start difference. First operand 110823 states and 132142 transitions. Second operand has 15 states, 15 states have (on average 82.46666666666667) internal successors, (1237), 13 states have internal predecessors, (1237), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 22:31:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:31:18,201 INFO L93 Difference]: Finished difference Result 233831 states and 274967 transitions. [2023-04-01 22:31:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 22:31:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 82.46666666666667) internal successors, (1237), 13 states have internal predecessors, (1237), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 607 [2023-04-01 22:31:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:31:18,621 INFO L225 Difference]: With dead ends: 233831 [2023-04-01 22:31:18,621 INFO L226 Difference]: Without dead ends: 120636 [2023-04-01 22:31:18,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1291 GetRequests, 1246 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=1558, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 22:31:18,706 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 9401 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 19167 mSolverCounterSat, 2037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9401 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 21204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2037 IncrementalHoareTripleChecker+Valid, 19167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-04-01 22:31:18,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9401 Valid, 552 Invalid, 21204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2037 Valid, 19167 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-04-01 22:31:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120636 states. [2023-04-01 22:31:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120636 to 115708. [2023-04-01 22:31:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115708 states, 112496 states have (on average 1.0571664770302944) internal successors, (118927), 113412 states have internal predecessors, (118927), 578 states have call successors, (578), 578 states have call predecessors, (578), 2633 states have return successors, (10547), 1717 states have call predecessors, (10547), 577 states have call successors, (10547) [2023-04-01 22:31:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115708 states to 115708 states and 130052 transitions. [2023-04-01 22:31:20,437 INFO L78 Accepts]: Start accepts. Automaton has 115708 states and 130052 transitions. Word has length 607 [2023-04-01 22:31:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:31:20,437 INFO L495 AbstractCegarLoop]: Abstraction has 115708 states and 130052 transitions. [2023-04-01 22:31:20,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.46666666666667) internal successors, (1237), 13 states have internal predecessors, (1237), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-04-01 22:31:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 115708 states and 130052 transitions. [2023-04-01 22:31:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2023-04-01 22:31:20,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:31:20,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:31:20,511 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 22:31:20,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:20,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:31:20,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:31:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1119187593, now seen corresponding path program 1 times [2023-04-01 22:31:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:31:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686251685] [2023-04-01 22:31:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:20,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:31:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:31:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:31:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 22:31:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2023-04-01 22:31:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:31:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 126 proven. 88 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-04-01 22:31:21,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:31:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686251685] [2023-04-01 22:31:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686251685] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:31:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780135996] [2023-04-01 22:31:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:21,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:31:21,705 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 22:31:21,706 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 22:31:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:21,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:31:21,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:31:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 275 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:31:22,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:31:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 275 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-04-01 22:31:27,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780135996] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:31:27,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:31:27,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2023-04-01 22:31:27,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719231477] [2023-04-01 22:31:27,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:31:27,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 22:31:27,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:31:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 22:31:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:31:27,315 INFO L87 Difference]: Start difference. First operand 115708 states and 130052 transitions. Second operand has 13 states, 13 states have (on average 90.53846153846153) internal successors, (1177), 11 states have internal predecessors, (1177), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:31:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:31:42,051 INFO L93 Difference]: Finished difference Result 305087 states and 351355 transitions. [2023-04-01 22:31:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-04-01 22:31:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 90.53846153846153) internal successors, (1177), 11 states have internal predecessors, (1177), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 617 [2023-04-01 22:31:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:31:42,555 INFO L225 Difference]: With dead ends: 305087 [2023-04-01 22:31:42,568 INFO L226 Difference]: Without dead ends: 189383 [2023-04-01 22:31:42,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1296 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=871, Invalid=4531, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 22:31:42,668 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 11276 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 17617 mSolverCounterSat, 4076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11277 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 21693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4076 IncrementalHoareTripleChecker+Valid, 17617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-04-01 22:31:42,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11277 Valid, 673 Invalid, 21693 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4076 Valid, 17617 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2023-04-01 22:31:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189383 states. [2023-04-01 22:31:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189383 to 187477. [2023-04-01 22:31:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187477 states, 183043 states have (on average 1.0514960965456204) internal successors, (192469), 184212 states have internal predecessors, (192469), 946 states have call successors, (946), 946 states have call predecessors, (946), 3487 states have return successors, (16746), 2318 states have call predecessors, (16746), 945 states have call successors, (16746) [2023-04-01 22:31:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187477 states to 187477 states and 210161 transitions. [2023-04-01 22:31:45,549 INFO L78 Accepts]: Start accepts. Automaton has 187477 states and 210161 transitions. Word has length 617 [2023-04-01 22:31:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:31:45,550 INFO L495 AbstractCegarLoop]: Abstraction has 187477 states and 210161 transitions. [2023-04-01 22:31:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.53846153846153) internal successors, (1177), 11 states have internal predecessors, (1177), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:31:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 187477 states and 210161 transitions. [2023-04-01 22:31:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2023-04-01 22:31:45,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:31:45,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:31:45,596 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 22:31:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:45,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:31:45,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:31:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1408637937, now seen corresponding path program 1 times [2023-04-01 22:31:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:31:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954969347] [2023-04-01 22:31:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:31:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:31:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:31:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:47,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:31:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:47,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2023-04-01 22:31:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:31:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-04-01 22:31:47,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:31:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954969347] [2023-04-01 22:31:47,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954969347] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:31:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507868259] [2023-04-01 22:31:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:47,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:47,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:31:47,501 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 22:31:47,557 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 22:31:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:47,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 22:31:47,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:31:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-04-01 22:31:47,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 22:31:47,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507868259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 22:31:47,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 22:31:47,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2023-04-01 22:31:47,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479561523] [2023-04-01 22:31:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 22:31:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 22:31:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:31:47,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 22:31:47,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:31:47,781 INFO L87 Difference]: Start difference. First operand 187477 states and 210161 transitions. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 22:31:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:31:51,824 INFO L93 Difference]: Finished difference Result 391059 states and 438243 transitions. [2023-04-01 22:31:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 22:31:51,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 680 [2023-04-01 22:31:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:31:52,585 INFO L225 Difference]: With dead ends: 391059 [2023-04-01 22:31:52,585 INFO L226 Difference]: Without dead ends: 194310 [2023-04-01 22:31:52,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 22:31:52,728 INFO L413 NwaCegarLoop]: 1427 mSDtfsCounter, 783 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 22:31:52,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 1458 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 22:31:52,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194310 states. [2023-04-01 22:31:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194310 to 188162. [2023-04-01 22:31:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188162 states, 184043 states have (on average 1.0390723906913057) internal successors, (191234), 185068 states have internal predecessors, (191234), 954 states have call successors, (954), 954 states have call predecessors, (954), 3164 states have return successors, (13968), 2139 states have call predecessors, (13968), 953 states have call successors, (13968) [2023-04-01 22:31:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188162 states to 188162 states and 206156 transitions. [2023-04-01 22:31:56,040 INFO L78 Accepts]: Start accepts. Automaton has 188162 states and 206156 transitions. Word has length 680 [2023-04-01 22:31:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:31:56,040 INFO L495 AbstractCegarLoop]: Abstraction has 188162 states and 206156 transitions. [2023-04-01 22:31:56,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 22:31:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 188162 states and 206156 transitions. [2023-04-01 22:31:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2023-04-01 22:31:56,092 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:31:56,092 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:31:56,098 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 22:31:56,298 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,SelfDestructingSolverStorable11 [2023-04-01 22:31:56,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:31:56,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:31:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash -372925409, now seen corresponding path program 1 times [2023-04-01 22:31:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:31:56,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689351056] [2023-04-01 22:31:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:31:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:57,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:31:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:57,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:31:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:31:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2023-04-01 22:31:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2023-04-01 22:31:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:31:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 542 proven. 16 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-01 22:31:58,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:31:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689351056] [2023-04-01 22:31:58,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689351056] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:31:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106999664] [2023-04-01 22:31:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:31:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:31:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:31:58,637 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 22:31:58,638 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 22:31:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:31:58,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 22:31:58,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:31:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 550 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-01 22:31:59,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:32:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 550 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-01 22:32:04,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106999664] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:32:04,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:32:04,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 6] total 15 [2023-04-01 22:32:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39738534] [2023-04-01 22:32:04,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:32:04,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 22:32:04,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:32:04,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 22:32:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-04-01 22:32:04,411 INFO L87 Difference]: Start difference. First operand 188162 states and 206156 transitions. Second operand has 15 states, 15 states have (on average 87.06666666666666) internal successors, (1306), 13 states have internal predecessors, (1306), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-04-01 22:32:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:32:19,645 INFO L93 Difference]: Finished difference Result 376039 states and 412505 transitions. [2023-04-01 22:32:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-01 22:32:19,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 87.06666666666666) internal successors, (1306), 13 states have internal predecessors, (1306), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 877 [2023-04-01 22:32:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:32:20,236 INFO L225 Difference]: With dead ends: 376039 [2023-04-01 22:32:20,237 INFO L226 Difference]: Without dead ends: 188650 [2023-04-01 22:32:20,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1868 GetRequests, 1806 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 22:32:20,617 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 7143 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 25469 mSolverCounterSat, 2914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7149 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 28383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2914 IncrementalHoareTripleChecker+Valid, 25469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-04-01 22:32:20,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7149 Valid, 692 Invalid, 28383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2914 Valid, 25469 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-04-01 22:32:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188650 states. [2023-04-01 22:32:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188650 to 186771. [2023-04-01 22:32:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186771 states, 182613 states have (on average 1.0306111832125862) internal successors, (188203), 183660 states have internal predecessors, (188203), 946 states have call successors, (946), 946 states have call predecessors, (946), 3211 states have return successors, (11058), 2164 states have call predecessors, (11058), 945 states have call successors, (11058) [2023-04-01 22:32:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186771 states to 186771 states and 200207 transitions. [2023-04-01 22:32:23,523 INFO L78 Accepts]: Start accepts. Automaton has 186771 states and 200207 transitions. Word has length 877 [2023-04-01 22:32:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:32:23,523 INFO L495 AbstractCegarLoop]: Abstraction has 186771 states and 200207 transitions. [2023-04-01 22:32:23,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.06666666666666) internal successors, (1306), 13 states have internal predecessors, (1306), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-04-01 22:32:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 186771 states and 200207 transitions. [2023-04-01 22:32:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2023-04-01 22:32:23,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:32:23,570 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:32:23,578 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 22:32:23,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 22:32:23,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:32:23,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:32:23,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1568857435, now seen corresponding path program 1 times [2023-04-01 22:32:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:32:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604180357] [2023-04-01 22:32:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:32:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:32:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:32:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:32:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:32:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 401 [2023-04-01 22:32:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2023-04-01 22:32:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:32:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 341 proven. 142 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-04-01 22:32:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:32:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604180357] [2023-04-01 22:32:24,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604180357] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:32:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061833708] [2023-04-01 22:32:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:32:24,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:32:24,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:32:24,789 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 22:32:24,813 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 22:32:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:25,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 22:32:25,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:32:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 588 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-04-01 22:32:25,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:32:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 588 proven. 2 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-04-01 22:32:29,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061833708] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:32:29,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:32:29,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2023-04-01 22:32:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823049510] [2023-04-01 22:32:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:32:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 22:32:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:32:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 22:32:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-04-01 22:32:29,673 INFO L87 Difference]: Start difference. First operand 186771 states and 200207 transitions. Second operand has 13 states, 13 states have (on average 94.76923076923077) internal successors, (1232), 11 states have internal predecessors, (1232), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:32:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:32:48,988 INFO L93 Difference]: Finished difference Result 443536 states and 480844 transitions. [2023-04-01 22:32:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-04-01 22:32:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 94.76923076923077) internal successors, (1232), 11 states have internal predecessors, (1232), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 915 [2023-04-01 22:32:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:32:49,993 INFO L225 Difference]: With dead ends: 443536 [2023-04-01 22:32:49,993 INFO L226 Difference]: Without dead ends: 256763 [2023-04-01 22:32:50,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1950 GetRequests, 1885 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=702, Invalid=3458, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 22:32:50,145 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 4992 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 26135 mSolverCounterSat, 2329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4999 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 28464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2329 IncrementalHoareTripleChecker+Valid, 26135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-04-01 22:32:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4999 Valid, 796 Invalid, 28464 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2329 Valid, 26135 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2023-04-01 22:32:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256763 states. [2023-04-01 22:32:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256763 to 244629. [2023-04-01 22:32:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244629 states, 239432 states have (on average 1.0277114170202812) internal successors, (246067), 240720 states have internal predecessors, (246067), 1242 states have call successors, (1242), 1242 states have call predecessors, (1242), 3954 states have return successors, (13585), 2666 states have call predecessors, (13585), 1241 states have call successors, (13585) [2023-04-01 22:32:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244629 states to 244629 states and 260894 transitions. [2023-04-01 22:32:54,106 INFO L78 Accepts]: Start accepts. Automaton has 244629 states and 260894 transitions. Word has length 915 [2023-04-01 22:32:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:32:54,106 INFO L495 AbstractCegarLoop]: Abstraction has 244629 states and 260894 transitions. [2023-04-01 22:32:54,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 94.76923076923077) internal successors, (1232), 11 states have internal predecessors, (1232), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-04-01 22:32:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 244629 states and 260894 transitions. [2023-04-01 22:32:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2023-04-01 22:32:54,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:32:54,517 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 22:32:54,553 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 22:32:54,723 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,SelfDestructingSolverStorable13 [2023-04-01 22:32:54,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:32:54,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:32:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1548204854, now seen corresponding path program 1 times [2023-04-01 22:32:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:32:54,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572510155] [2023-04-01 22:32:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:32:54,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:32:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:56,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:32:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:32:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2023-04-01 22:32:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2023-04-01 22:32:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:56,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 547 [2023-04-01 22:32:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:57,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:32:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 595 proven. 4 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-04-01 22:32:57,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:32:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572510155] [2023-04-01 22:32:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572510155] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:32:57,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071950391] [2023-04-01 22:32:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:32:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:32:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:32:57,713 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 22:32:57,719 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 22:32:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:32:57,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 22:32:57,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:32:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 591 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-01 22:32:59,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:33:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 591 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-01 22:33:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071950391] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:33:03,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:33:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 14 [2023-04-01 22:33:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901295603] [2023-04-01 22:33:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:33:03,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 22:33:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:03,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 22:33:03,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:33:03,698 INFO L87 Difference]: Start difference. First operand 244629 states and 260894 transitions. Second operand has 14 states, 14 states have (on average 93.64285714285714) internal successors, (1311), 12 states have internal predecessors, (1311), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:33:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 22:33:14,718 INFO L93 Difference]: Finished difference Result 493366 states and 526652 transitions. [2023-04-01 22:33:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 22:33:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 93.64285714285714) internal successors, (1311), 12 states have internal predecessors, (1311), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 918 [2023-04-01 22:33:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 22:33:15,813 INFO L225 Difference]: With dead ends: 493366 [2023-04-01 22:33:15,813 INFO L226 Difference]: Without dead ends: 249510 [2023-04-01 22:33:15,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1893 GetRequests, 1856 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 22:33:15,999 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4651 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 15174 mSolverCounterSat, 1474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 16648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1474 IncrementalHoareTripleChecker+Valid, 15174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-04-01 22:33:16,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4653 Valid, 347 Invalid, 16648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1474 Valid, 15174 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2023-04-01 22:33:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249510 states. [2023-04-01 22:33:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249510 to 246943. [2023-04-01 22:33:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246943 states, 241716 states have (on average 1.026200168793129) internal successors, (248049), 243009 states have internal predecessors, (248049), 1254 states have call successors, (1254), 1254 states have call predecessors, (1254), 3972 states have return successors, (13011), 2679 states have call predecessors, (13011), 1253 states have call successors, (13011) [2023-04-01 22:33:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246943 states to 246943 states and 262314 transitions. [2023-04-01 22:33:19,870 INFO L78 Accepts]: Start accepts. Automaton has 246943 states and 262314 transitions. Word has length 918 [2023-04-01 22:33:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 22:33:19,870 INFO L495 AbstractCegarLoop]: Abstraction has 246943 states and 262314 transitions. [2023-04-01 22:33:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.64285714285714) internal successors, (1311), 12 states have internal predecessors, (1311), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 22:33:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 246943 states and 262314 transitions. [2023-04-01 22:33:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1041 [2023-04-01 22:33:19,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 22:33:19,976 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 22:33:19,983 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 22:33:20,182 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,SelfDestructingSolverStorable14 [2023-04-01 22:33:20,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 22:33:20,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 22:33:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -342869442, now seen corresponding path program 1 times [2023-04-01 22:33:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 22:33:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831174891] [2023-04-01 22:33:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 22:33:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:21,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 22:33:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:21,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 22:33:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-04-01 22:33:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 22:33:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2023-04-01 22:33:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2023-04-01 22:33:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 669 [2023-04-01 22:33:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2023-04-01 22:33:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 733 proven. 28 refuted. 0 times theorem prover too weak. 1046 trivial. 0 not checked. [2023-04-01 22:33:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 22:33:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831174891] [2023-04-01 22:33:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831174891] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 22:33:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078590452] [2023-04-01 22:33:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 22:33:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 22:33:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 22:33:22,702 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 22:33:22,703 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 22:33:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 22:33:22,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 22:33:22,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 22:33:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 1326 proven. 2 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2023-04-01 22:33:23,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 22:33:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 426 proven. 260 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2023-04-01 22:33:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078590452] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 22:33:25,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 22:33:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-04-01 22:33:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818332099] [2023-04-01 22:33:25,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 22:33:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 22:33:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 22:33:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 22:33:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 22:33:25,543 INFO L87 Difference]: Start difference. First operand 246943 states and 262314 transitions. Second operand has 14 states, 14 states have (on average 96.35714285714286) internal successors, (1349), 12 states have internal predecessors, (1349), 7 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15)