/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/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 20:23:12,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 20:23:12,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 20:23:12,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 20:23:13,042 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 20:23:13,061 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 20:23:13,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 20:23:13,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 20:23:13,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 20:23:13,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 20:23:13,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 20:23:13,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 20:23:13,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 20:23:13,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 20:23:13,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:13,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 20:23:13,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 20:23:13,065 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 20:23:13,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 20:23:13,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 20:23:13,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 20:23:13,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 20:23:13,268 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 20:23:13,269 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 20:23:13,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-04-01 20:23:14,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 20:23:14,460 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 20:23:14,461 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label10.c [2023-04-01 20:23:14,479 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3feb2bd/f1d3544fff56484e87621f99306705c1/FLAG95453acaa [2023-04-01 20:23:14,786 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3feb2bd/f1d3544fff56484e87621f99306705c1 [2023-04-01 20:23:14,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 20:23:14,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 20:23:14,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:14,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 20:23:14,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 20:23:14,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:14" (1/1) ... [2023-04-01 20:23:14,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577d843f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:14, skipping insertion in model container [2023-04-01 20:23:14,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:23:14" (1/1) ... [2023-04-01 20:23:14,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 20:23:14,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 20:23:15,265 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/Problem03_label10.c[58665,58678] [2023-04-01 20:23:15,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:15,289 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 20:23:15,389 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/Problem03_label10.c[58665,58678] [2023-04-01 20:23:15,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 20:23:15,407 INFO L208 MainTranslator]: Completed translation [2023-04-01 20:23:15,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15 WrapperNode [2023-04-01 20:23:15,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 20:23:15,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 20:23:15,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 20:23:15,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 20:23:15,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 20:23:15,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 20:23:15,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 20:23:15,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 20:23:15,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (1/1) ... [2023-04-01 20:23:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 20:23:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:15,519 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 20:23:15,561 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 20:23:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 20:23:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 20:23:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 20:23:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 20:23:15,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 20:23:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 20:23:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 20:23:15,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 20:23:15,681 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 20:23:15,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 20:23:17,032 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 20:23:17,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 20:23:17,039 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 20:23:17,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:17 BoogieIcfgContainer [2023-04-01 20:23:17,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 20:23:17,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 20:23:17,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 20:23:17,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 20:23:17,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:23:14" (1/3) ... [2023-04-01 20:23:17,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c5e7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:17, skipping insertion in model container [2023-04-01 20:23:17,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:23:15" (2/3) ... [2023-04-01 20:23:17,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c5e7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:23:17, skipping insertion in model container [2023-04-01 20:23:17,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:23:17" (3/3) ... [2023-04-01 20:23:17,046 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label10.c [2023-04-01 20:23:17,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 20:23:17,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 20:23:17,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 20:23:17,096 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;@31905849, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 20:23:17,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 20:23:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-04-01 20:23:17,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:17,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:17,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:17,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 654778841, now seen corresponding path program 1 times [2023-04-01 20:23:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:17,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11715586] [2023-04-01 20:23:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:17,904 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 20:23:17,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11715586] [2023-04-01 20:23:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11715586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 20:23:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937485909] [2023-04-01 20:23:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 20:23:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 20:23:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 20:23:17,938 INFO L87 Difference]: Start difference. First operand has 311 states, 303 states have (on average 1.7227722772277227) internal successors, (522), 304 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 20:23:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:19,459 INFO L93 Difference]: Finished difference Result 858 states and 1518 transitions. [2023-04-01 20:23:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 20:23:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 187 [2023-04-01 20:23:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:19,470 INFO L225 Difference]: With dead ends: 858 [2023-04-01 20:23:19,470 INFO L226 Difference]: Without dead ends: 483 [2023-04-01 20:23:19,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 20:23:19,476 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 650 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:19,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 54 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 20:23:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-04-01 20:23:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 465. [2023-04-01 20:23:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 455 states have (on average 1.6087912087912088) internal successors, (732), 457 states have internal predecessors, (732), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-04-01 20:23:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 743 transitions. [2023-04-01 20:23:19,529 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 743 transitions. Word has length 187 [2023-04-01 20:23:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 743 transitions. [2023-04-01 20:23:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 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 20:23:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 743 transitions. [2023-04-01 20:23:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-04-01 20:23:19,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:19,534 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 20:23:19,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 20:23:19,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:19,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1951339923, now seen corresponding path program 1 times [2023-04-01 20:23:19,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:19,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142916385] [2023-04-01 20:23:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:19,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:19,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:20,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142916385] [2023-04-01 20:23:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142916385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:20,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:20,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:23:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033595745] [2023-04-01 20:23:20,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:23:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:23:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:20,047 INFO L87 Difference]: Start difference. First operand 465 states and 743 transitions. Second operand has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 20:23:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:21,446 INFO L93 Difference]: Finished difference Result 1396 states and 2264 transitions. [2023-04-01 20:23:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:23:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 196 [2023-04-01 20:23:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:21,451 INFO L225 Difference]: With dead ends: 1396 [2023-04-01 20:23:21,451 INFO L226 Difference]: Without dead ends: 937 [2023-04-01 20:23:21,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:23:21,453 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1304 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:21,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 122 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:23:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-04-01 20:23:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 916. [2023-04-01 20:23:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 896 states have (on average 1.5212053571428572) internal successors, (1363), 904 states have internal predecessors, (1363), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 20:23:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1394 transitions. [2023-04-01 20:23:21,486 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1394 transitions. Word has length 196 [2023-04-01 20:23:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:21,486 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1394 transitions. [2023-04-01 20:23:21,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 4 states have internal predecessors, (190), 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 20:23:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1394 transitions. [2023-04-01 20:23:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-04-01 20:23:21,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:21,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:21,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 20:23:21,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:21,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1945424131, now seen corresponding path program 1 times [2023-04-01 20:23:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43784841] [2023-04-01 20:23:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:21,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:21,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43784841] [2023-04-01 20:23:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43784841] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:21,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:21,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:23:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308336572] [2023-04-01 20:23:21,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:21,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:23:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:23:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:21,993 INFO L87 Difference]: Start difference. First operand 916 states and 1394 transitions. Second operand has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 20:23:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:22,805 INFO L93 Difference]: Finished difference Result 1801 states and 2774 transitions. [2023-04-01 20:23:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 204 [2023-04-01 20:23:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:22,808 INFO L225 Difference]: With dead ends: 1801 [2023-04-01 20:23:22,808 INFO L226 Difference]: Without dead ends: 891 [2023-04-01 20:23:22,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:23:22,811 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 903 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:22,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 43 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-04-01 20:23:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2023-04-01 20:23:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 867 states have (on average 1.467128027681661) internal successors, (1272), 875 states have internal predecessors, (1272), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (25), 5 states have call predecessors, (25), 5 states have call successors, (25) [2023-04-01 20:23:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1303 transitions. [2023-04-01 20:23:22,834 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1303 transitions. Word has length 204 [2023-04-01 20:23:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:22,834 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1303 transitions. [2023-04-01 20:23:22,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 33.0) internal successors, (198), 4 states have internal predecessors, (198), 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 20:23:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1303 transitions. [2023-04-01 20:23:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-04-01 20:23:22,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:22,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 20:23:22,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:22,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1751189265, now seen corresponding path program 1 times [2023-04-01 20:23:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350991865] [2023-04-01 20:23:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 20:23:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:23,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:23,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350991865] [2023-04-01 20:23:23,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350991865] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:23,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894776116] [2023-04-01 20:23:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:23,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:23,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:23,306 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 20:23:23,324 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 20:23:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:23,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:23:23,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 20:23:23,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:23,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894776116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:23,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:23,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483826584] [2023-04-01 20:23:23,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:23,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:23,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:23,646 INFO L87 Difference]: Start difference. First operand 887 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:24,371 INFO L93 Difference]: Finished difference Result 2692 states and 4112 transitions. [2023-04-01 20:23:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 209 [2023-04-01 20:23:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:24,377 INFO L225 Difference]: With dead ends: 2692 [2023-04-01 20:23:24,377 INFO L226 Difference]: Without dead ends: 1811 [2023-04-01 20:23:24,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:24,379 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 742 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:24,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 106 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2023-04-01 20:23:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1771. [2023-04-01 20:23:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1726 states have (on average 1.399188876013905) internal successors, (2415), 1751 states have internal predecessors, (2415), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (113), 9 states have call predecessors, (113), 9 states have call successors, (113) [2023-04-01 20:23:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2538 transitions. [2023-04-01 20:23:24,421 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2538 transitions. Word has length 209 [2023-04-01 20:23:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:24,421 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2538 transitions. [2023-04-01 20:23:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2538 transitions. [2023-04-01 20:23:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-04-01 20:23:24,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:24,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-04-01 20:23:24,434 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 20:23:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:24,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -491394392, now seen corresponding path program 1 times [2023-04-01 20:23:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375147684] [2023-04-01 20:23:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:25,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:25,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:25,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:23:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:25,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:25,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375147684] [2023-04-01 20:23:25,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375147684] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317284660] [2023-04-01 20:23:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:25,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:25,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:25,424 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 20:23:25,460 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 20:23:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:25,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:23:25,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 20:23:25,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:25,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317284660] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:25,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:25,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927695870] [2023-04-01 20:23:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:25,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:25,667 INFO L87 Difference]: Start difference. First operand 1771 states and 2538 transitions. Second operand has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:25,973 INFO L93 Difference]: Finished difference Result 5361 states and 7957 transitions. [2023-04-01 20:23:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 210 [2023-04-01 20:23:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:25,985 INFO L225 Difference]: With dead ends: 5361 [2023-04-01 20:23:25,985 INFO L226 Difference]: Without dead ends: 3596 [2023-04-01 20:23:25,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:25,988 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 976 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:25,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 820 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:23:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2023-04-01 20:23:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3558. [2023-04-01 20:23:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3452 states have (on average 1.3974507531865585) internal successors, (4824), 3522 states have internal predecessors, (4824), 18 states have call successors, (18), 18 states have call predecessors, (18), 87 states have return successors, (353), 17 states have call predecessors, (353), 17 states have call successors, (353) [2023-04-01 20:23:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5195 transitions. [2023-04-01 20:23:26,076 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5195 transitions. Word has length 210 [2023-04-01 20:23:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:26,077 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 5195 transitions. [2023-04-01 20:23:26,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.6) internal successors, (198), 4 states have internal predecessors, (198), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5195 transitions. [2023-04-01 20:23:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 20:23:26,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:26,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:26,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:26,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:26,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:26,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1321133013, now seen corresponding path program 1 times [2023-04-01 20:23:26,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:26,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946961732] [2023-04-01 20:23:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:26,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 20:23:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 20:23:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946961732] [2023-04-01 20:23:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946961732] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083870472] [2023-04-01 20:23:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:27,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:27,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:27,079 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 20:23:27,081 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 20:23:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:27,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 20:23:27,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 20:23:27,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:27,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083870472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:27,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:27,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 20:23:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638381936] [2023-04-01 20:23:27,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:27,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 20:23:27,342 INFO L87 Difference]: Start difference. First operand 3558 states and 5195 transitions. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:27,655 INFO L93 Difference]: Finished difference Result 10792 states and 16326 transitions. [2023-04-01 20:23:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 219 [2023-04-01 20:23:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:27,680 INFO L225 Difference]: With dead ends: 10792 [2023-04-01 20:23:27,680 INFO L226 Difference]: Without dead ends: 7240 [2023-04-01 20:23:27,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:27,688 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 988 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:27,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 834 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 20:23:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2023-04-01 20:23:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 7162. [2023-04-01 20:23:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 6925 states have (on average 1.3927797833935018) internal successors, (9645), 7094 states have internal predecessors, (9645), 34 states have call successors, (34), 34 states have call predecessors, (34), 202 states have return successors, (865), 33 states have call predecessors, (865), 33 states have call successors, (865) [2023-04-01 20:23:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 10544 transitions. [2023-04-01 20:23:27,915 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 10544 transitions. Word has length 219 [2023-04-01 20:23:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:27,916 INFO L495 AbstractCegarLoop]: Abstraction has 7162 states and 10544 transitions. [2023-04-01 20:23:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 4 states have internal predecessors, (202), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 20:23:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 10544 transitions. [2023-04-01 20:23:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 20:23:27,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:27,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 20:23:27,953 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 20:23:28,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:28,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:28,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1988400293, now seen corresponding path program 1 times [2023-04-01 20:23:28,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661042410] [2023-04-01 20:23:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661042410] [2023-04-01 20:23:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661042410] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521888907] [2023-04-01 20:23:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:28,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:28,490 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 20:23:28,492 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 20:23:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:28,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:28,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:28,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 20:23:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521888907] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 20:23:28,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 20:23:28,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-04-01 20:23:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999202823] [2023-04-01 20:23:28,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 20:23:28,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 20:23:28,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 20:23:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:23:28,771 INFO L87 Difference]: Start difference. First operand 7162 states and 10544 transitions. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:23:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:35,931 INFO L93 Difference]: Finished difference Result 31312 states and 59962 transitions. [2023-04-01 20:23:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-01 20:23:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 219 [2023-04-01 20:23:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:36,161 INFO L225 Difference]: With dead ends: 31312 [2023-04-01 20:23:36,161 INFO L226 Difference]: Without dead ends: 24148 [2023-04-01 20:23:36,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 480 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=592, Invalid=3068, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 20:23:36,227 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 2814 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 7431 mSolverCounterSat, 1136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2835 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 8567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1136 IncrementalHoareTripleChecker+Valid, 7431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:36,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2835 Valid, 424 Invalid, 8567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1136 Valid, 7431 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 20:23:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24148 states. [2023-04-01 20:23:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24148 to 22840. [2023-04-01 20:23:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22840 states, 22083 states have (on average 1.2092107050672463) internal successors, (26703), 22612 states have internal predecessors, (26703), 122 states have call successors, (122), 106 states have call predecessors, (122), 634 states have return successors, (3472), 121 states have call predecessors, (3472), 121 states have call successors, (3472) [2023-04-01 20:23:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22840 states to 22840 states and 30297 transitions. [2023-04-01 20:23:37,360 INFO L78 Accepts]: Start accepts. Automaton has 22840 states and 30297 transitions. Word has length 219 [2023-04-01 20:23:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:37,360 INFO L495 AbstractCegarLoop]: Abstraction has 22840 states and 30297 transitions. [2023-04-01 20:23:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 10 states have internal predecessors, (230), 4 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 20:23:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22840 states and 30297 transitions. [2023-04-01 20:23:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-04-01 20:23:37,390 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:37,390 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:37,396 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 20:23:37,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:37,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:37,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1552061052, now seen corresponding path program 1 times [2023-04-01 20:23:37,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:37,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055168516] [2023-04-01 20:23:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:37,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 20:23:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 20:23:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 20:23:38,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055168516] [2023-04-01 20:23:38,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055168516] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735059113] [2023-04-01 20:23:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:38,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:38,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:38,129 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 20:23:38,179 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 20:23:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:38,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 20:23:38,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 20:23:38,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:38,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735059113] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:38,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:38,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 20:23:38,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242696884] [2023-04-01 20:23:38,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:38,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 20:23:38,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 20:23:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:38,427 INFO L87 Difference]: Start difference. First operand 22840 states and 30297 transitions. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:39,835 INFO L93 Difference]: Finished difference Result 56492 states and 76533 transitions. [2023-04-01 20:23:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 20:23:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 231 [2023-04-01 20:23:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:39,922 INFO L225 Difference]: With dead ends: 56492 [2023-04-01 20:23:39,923 INFO L226 Difference]: Without dead ends: 33710 [2023-04-01 20:23:39,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 20:23:39,973 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 655 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:39,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 94 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 20:23:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33710 states. [2023-04-01 20:23:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33710 to 33536. [2023-04-01 20:23:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33536 states, 32505 states have (on average 1.1686202122750347) internal successors, (37986), 33209 states have internal predecessors, (37986), 171 states have call successors, (171), 156 states have call predecessors, (171), 859 states have return successors, (4359), 170 states have call predecessors, (4359), 170 states have call successors, (4359) [2023-04-01 20:23:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33536 states to 33536 states and 42516 transitions. [2023-04-01 20:23:40,983 INFO L78 Accepts]: Start accepts. Automaton has 33536 states and 42516 transitions. Word has length 231 [2023-04-01 20:23:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:40,984 INFO L495 AbstractCegarLoop]: Abstraction has 33536 states and 42516 transitions. [2023-04-01 20:23:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 20:23:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33536 states and 42516 transitions. [2023-04-01 20:23:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-04-01 20:23:41,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:41,043 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:41,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 20:23:41,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:41,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:41,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:41,286 INFO L85 PathProgramCache]: Analyzing trace with hash -685751639, now seen corresponding path program 1 times [2023-04-01 20:23:41,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:41,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635061935] [2023-04-01 20:23:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:41,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:42,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:42,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 20:23:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635061935] [2023-04-01 20:23:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635061935] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563288186] [2023-04-01 20:23:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:42,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:42,303 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 20:23:42,304 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 20:23:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:42,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 20:23:42,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 20:23:42,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:42,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563288186] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:42,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:42,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2023-04-01 20:23:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565430800] [2023-04-01 20:23:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:42,707 INFO L87 Difference]: Start difference. First operand 33536 states and 42516 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 20:23:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:44,006 INFO L93 Difference]: Finished difference Result 93514 states and 120275 transitions. [2023-04-01 20:23:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 233 [2023-04-01 20:23:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:44,154 INFO L225 Difference]: With dead ends: 93514 [2023-04-01 20:23:44,154 INFO L226 Difference]: Without dead ends: 59988 [2023-04-01 20:23:44,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:44,198 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 48 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:44,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 366 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 20:23:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59988 states. [2023-04-01 20:23:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59988 to 59920. [2023-04-01 20:23:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59920 states, 58494 states have (on average 1.1570417478715767) internal successors, (67680), 59333 states have internal predecessors, (67680), 305 states have call successors, (305), 282 states have call predecessors, (305), 1120 states have return successors, (7866), 304 states have call predecessors, (7866), 304 states have call successors, (7866) [2023-04-01 20:23:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59920 states to 59920 states and 75851 transitions. [2023-04-01 20:23:45,761 INFO L78 Accepts]: Start accepts. Automaton has 59920 states and 75851 transitions. Word has length 233 [2023-04-01 20:23:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:45,762 INFO L495 AbstractCegarLoop]: Abstraction has 59920 states and 75851 transitions. [2023-04-01 20:23:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 20:23:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 59920 states and 75851 transitions. [2023-04-01 20:23:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-04-01 20:23:45,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:45,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:45,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 20:23:46,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:46,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:46,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash -177953092, now seen corresponding path program 1 times [2023-04-01 20:23:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:46,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795281114] [2023-04-01 20:23:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:46,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 20:23:47,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:47,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795281114] [2023-04-01 20:23:47,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795281114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:47,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 20:23:47,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 20:23:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026597017] [2023-04-01 20:23:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 20:23:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 20:23:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 20:23:47,029 INFO L87 Difference]: Start difference. First operand 59920 states and 75851 transitions. Second operand has 7 states, 6 states have (on average 37.666666666666664) internal successors, (226), 4 states have internal predecessors, (226), 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 20:23:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:49,372 INFO L93 Difference]: Finished difference Result 106957 states and 135154 transitions. [2023-04-01 20:23:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 20:23:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 37.666666666666664) internal successors, (226), 4 states have internal predecessors, (226), 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 232 [2023-04-01 20:23:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:49,521 INFO L225 Difference]: With dead ends: 106957 [2023-04-01 20:23:49,521 INFO L226 Difference]: Without dead ends: 70283 [2023-04-01 20:23:49,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-01 20:23:49,663 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1002 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:49,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 88 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 20:23:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70283 states. [2023-04-01 20:23:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70283 to 70089. [2023-04-01 20:23:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70089 states, 68354 states have (on average 1.1497352020364573) internal successors, (78589), 69406 states have internal predecessors, (78589), 354 states have call successors, (354), 329 states have call predecessors, (354), 1380 states have return successors, (9382), 353 states have call predecessors, (9382), 353 states have call successors, (9382) [2023-04-01 20:23:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70089 states to 70089 states and 88325 transitions. [2023-04-01 20:23:51,458 INFO L78 Accepts]: Start accepts. Automaton has 70089 states and 88325 transitions. Word has length 232 [2023-04-01 20:23:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:51,458 INFO L495 AbstractCegarLoop]: Abstraction has 70089 states and 88325 transitions. [2023-04-01 20:23:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 37.666666666666664) internal successors, (226), 4 states have internal predecessors, (226), 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 20:23:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 70089 states and 88325 transitions. [2023-04-01 20:23:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-04-01 20:23:51,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 20:23:51,505 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:51,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 20:23:51,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 20:23:51,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 20:23:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1378084560, now seen corresponding path program 1 times [2023-04-01 20:23:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 20:23:51,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36665826] [2023-04-01 20:23:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:51,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 20:23:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 20:23:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 20:23:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-01 20:23:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 20:23:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 20:23:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36665826] [2023-04-01 20:23:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36665826] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 20:23:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934686332] [2023-04-01 20:23:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 20:23:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 20:23:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 20:23:52,372 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 20:23:52,409 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 20:23:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 20:23:52,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 20:23:52,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 20:23:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 20:23:52,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 20:23:52,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934686332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 20:23:52,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 20:23:52,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-04-01 20:23:52,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852464340] [2023-04-01 20:23:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 20:23:52,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 20:23:52,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 20:23:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 20:23:52,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:23:52,780 INFO L87 Difference]: Start difference. First operand 70089 states and 88325 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 20:23:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 20:23:54,111 INFO L93 Difference]: Finished difference Result 116251 states and 145566 transitions. [2023-04-01 20:23:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 20:23:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 253 [2023-04-01 20:23:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 20:23:54,112 INFO L225 Difference]: With dead ends: 116251 [2023-04-01 20:23:54,112 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 20:23:54,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 20:23:54,191 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 91 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 20:23:54,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 59 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 20:23:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 20:23:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 20:23:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 20:23:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 20:23:54,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 253 [2023-04-01 20:23:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 20:23:54,192 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 20:23:54,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 20:23:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 20:23:54,193 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 20:23:54,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 20:23:54,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 20:23:54,401 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 20:23:54,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.