./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/MultCommutative-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:22:48,153 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:22:48,221 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:22:48,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:22:48,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:22:48,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:22:48,250 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:22:48,250 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:22:48,250 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:22:48,251 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:22:48,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:22:48,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:22:48,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:22:48,253 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:22:48,254 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:22:48,254 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:22:48,254 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:22:48,254 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:22:48,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:22:48,255 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:22:48,255 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:22:48,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:22:48,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:22:48,259 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:22:48,259 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:22:48,260 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:22:48,260 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:22:48,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:22:48,261 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:22:48,262 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:22:48,262 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:22:48,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:22:48,262 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2024-11-18 14:22:48,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:22:48,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:22:48,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:22:48,468 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:22:48,468 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:22:48,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-18 14:22:49,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:22:49,864 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:22:49,865 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-18 14:22:49,870 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a729d3f92/1b4561bbe9ef4481a6820d60ca5590e0/FLAGf126a4c9a [2024-11-18 14:22:49,880 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a729d3f92/1b4561bbe9ef4481a6820d60ca5590e0 [2024-11-18 14:22:49,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:22:49,883 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:22:49,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:22:49,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:22:49,887 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:22:49,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:22:49" (1/1) ... [2024-11-18 14:22:49,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d22265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:49, skipping insertion in model container [2024-11-18 14:22:49,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:22:49" (1/1) ... [2024-11-18 14:22:49,904 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:22:50,034 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-11-18 14:22:50,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:22:50,046 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:22:50,057 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-11-18 14:22:50,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:22:50,069 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:22:50,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50 WrapperNode [2024-11-18 14:22:50,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:22:50,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:22:50,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:22:50,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:22:50,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,094 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2024-11-18 14:22:50,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:22:50,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:22:50,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:22:50,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:22:50,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,104 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,113 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 14:22:50,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:22:50,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:22:50,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:22:50,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:22:50,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (1/1) ... [2024-11-18 14:22:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:22:50,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:50,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 14:22:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 14:22:50,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:22:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2024-11-18 14:22:50,177 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2024-11-18 14:22:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:22:50,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:22:50,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:22:50,224 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:22:50,226 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:22:50,331 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-18 14:22:50,331 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:22:50,346 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:22:50,346 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:22:50,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:22:50 BoogieIcfgContainer [2024-11-18 14:22:50,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:22:50,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:22:50,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:22:50,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:22:50,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:22:49" (1/3) ... [2024-11-18 14:22:50,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52682538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:22:50, skipping insertion in model container [2024-11-18 14:22:50,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:50" (2/3) ... [2024-11-18 14:22:50,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52682538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:22:50, skipping insertion in model container [2024-11-18 14:22:50,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:22:50" (3/3) ... [2024-11-18 14:22:50,356 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2024-11-18 14:22:50,370 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:22:50,371 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:22:50,421 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:22:50,427 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@15f29f41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:22:50,427 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:22:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 14:22:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-18 14:22:50,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:50,444 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:50,445 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:50,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:50,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2024-11-18 14:22:50,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:50,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629631648] [2024-11-18 14:22:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:50,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:22:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:50,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629631648] [2024-11-18 14:22:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629631648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:22:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:22:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 14:22:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403855283] [2024-11-18 14:22:50,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:22:50,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 14:22:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 14:22:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:22:50,758 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:22:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:50,862 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-11-18 14:22:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 14:22:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-18 14:22:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:50,870 INFO L225 Difference]: With dead ends: 36 [2024-11-18 14:22:50,870 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 14:22:50,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-18 14:22:50,877 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:50,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 14:22:50,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-18 14:22:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-18 14:22:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-18 14:22:50,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2024-11-18 14:22:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:50,951 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-18 14:22:50,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:22:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-18 14:22:50,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-18 14:22:50,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:50,956 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:50,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:22:50,957 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:50,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2024-11-18 14:22:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302030591] [2024-11-18 14:22:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 14:22:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302030591] [2024-11-18 14:22:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302030591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:22:51,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:22:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 14:22:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722010279] [2024-11-18 14:22:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:22:51,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 14:22:51,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:51,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 14:22:51,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:22:51,124 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:22:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:51,180 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2024-11-18 14:22:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:22:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-18 14:22:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:51,182 INFO L225 Difference]: With dead ends: 35 [2024-11-18 14:22:51,183 INFO L226 Difference]: Without dead ends: 31 [2024-11-18 14:22:51,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:22:51,185 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:51,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:22:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-18 14:22:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-18 14:22:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-18 14:22:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-18 14:22:51,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2024-11-18 14:22:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:51,195 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-18 14:22:51,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:22:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-18 14:22:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 14:22:51,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:51,196 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:51,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:22:51,197 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:51,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1817517416, now seen corresponding path program 1 times [2024-11-18 14:22:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467266834] [2024-11-18 14:22:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:51,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:22:51,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467266834] [2024-11-18 14:22:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467266834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426211046] [2024-11-18 14:22:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:51,267 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) [2024-11-18 14:22:51,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:22:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:51,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 14:22:51,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:22:51,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:22:51,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426211046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:51,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:51,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-18 14:22:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346562460] [2024-11-18 14:22:51,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:51,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:22:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:51,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:22:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:22:51,465 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:22:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:51,551 INFO L93 Difference]: Finished difference Result 35 states and 53 transitions. [2024-11-18 14:22:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:22:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-18 14:22:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:51,555 INFO L225 Difference]: With dead ends: 35 [2024-11-18 14:22:51,555 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 14:22:51,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:22:51,557 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:51,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:51,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 14:22:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2024-11-18 14:22:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-18 14:22:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-18 14:22:51,564 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 27 [2024-11-18 14:22:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:51,565 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-18 14:22:51,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:22:51,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-18 14:22:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 14:22:51,567 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:51,567 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:51,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:22:51,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:51,768 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:51,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 2 times [2024-11-18 14:22:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:51,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249438241] [2024-11-18 14:22:51,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:22:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:51,779 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:22:51,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:22:51,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:51,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249438241] [2024-11-18 14:22:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249438241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:22:51,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:22:51,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:22:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069221698] [2024-11-18 14:22:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:22:51,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:22:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:22:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:51,843 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 14:22:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:51,880 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-18 14:22:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:22:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-11-18 14:22:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:51,882 INFO L225 Difference]: With dead ends: 29 [2024-11-18 14:22:51,882 INFO L226 Difference]: Without dead ends: 25 [2024-11-18 14:22:51,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:51,883 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:51,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:22:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-18 14:22:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-18 14:22:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-18 14:22:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-18 14:22:51,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-11-18 14:22:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:51,895 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-18 14:22:51,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 14:22:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-18 14:22:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 14:22:51,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:51,899 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:51,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 14:22:51,899 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:51,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 345194942, now seen corresponding path program 1 times [2024-11-18 14:22:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322512674] [2024-11-18 14:22:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-18 14:22:52,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322512674] [2024-11-18 14:22:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322512674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059800746] [2024-11-18 14:22:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:52,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:52,010 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) [2024-11-18 14:22:52,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:22:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:52,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 14:22:52,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-18 14:22:52,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-18 14:22:52,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059800746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:52,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:52,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-11-18 14:22:52,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510454483] [2024-11-18 14:22:52,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:52,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-18 14:22:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-18 14:22:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:22:52,245 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-18 14:22:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:52,392 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-18 14:22:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:22:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2024-11-18 14:22:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:52,394 INFO L225 Difference]: With dead ends: 47 [2024-11-18 14:22:52,394 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 14:22:52,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:22:52,395 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:52,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 14:22:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-18 14:22:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 24 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-18 14:22:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2024-11-18 14:22:52,401 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 46 [2024-11-18 14:22:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:52,402 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2024-11-18 14:22:52,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-18 14:22:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2024-11-18 14:22:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 14:22:52,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:52,403 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:52,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 14:22:52,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:52,604 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:52,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 3 times [2024-11-18 14:22:52,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:52,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712075898] [2024-11-18 14:22:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:22:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:52,622 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:22:52,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:22:52,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712075898] [2024-11-18 14:22:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712075898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769712033] [2024-11-18 14:22:52,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:22:52,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:52,979 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) [2024-11-18 14:22:52,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:22:53,017 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:22:53,017 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:53,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-18 14:22:53,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:22:53,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:22:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769712033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:53,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 35 [2024-11-18 14:22:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739238158] [2024-11-18 14:22:53,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:53,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-18 14:22:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-18 14:22:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 14:22:53,953 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-18 14:22:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:54,385 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-18 14:22:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:22:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-11-18 14:22:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:54,387 INFO L225 Difference]: With dead ends: 47 [2024-11-18 14:22:54,388 INFO L226 Difference]: Without dead ends: 43 [2024-11-18 14:22:54,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2024-11-18 14:22:54,391 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:54,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:22:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-18 14:22:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2024-11-18 14:22:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 5 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-18 14:22:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2024-11-18 14:22:54,399 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 34 [2024-11-18 14:22:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:54,400 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2024-11-18 14:22:54,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-18 14:22:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2024-11-18 14:22:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-18 14:22:54,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:54,401 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:54,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:22:54,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:54,606 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:54,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 4 times [2024-11-18 14:22:54,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:54,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11284704] [2024-11-18 14:22:54,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:22:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:54,620 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:22:54,620 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:22:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11284704] [2024-11-18 14:22:54,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11284704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041495484] [2024-11-18 14:22:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:22:54,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:55,000 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) [2024-11-18 14:22:55,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:22:55,039 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:22:55,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:55,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-18 14:22:55,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-18 14:22:55,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-18 14:22:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041495484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:55,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 18] total 38 [2024-11-18 14:22:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656217111] [2024-11-18 14:22:55,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:55,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-18 14:22:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-18 14:22:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:22:55,713 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-18 14:22:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:56,496 INFO L93 Difference]: Finished difference Result 77 states and 126 transitions. [2024-11-18 14:22:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-18 14:22:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 41 [2024-11-18 14:22:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:56,504 INFO L225 Difference]: With dead ends: 77 [2024-11-18 14:22:56,504 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 14:22:56,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=2895, Unknown=0, NotChecked=0, Total=3306 [2024-11-18 14:22:56,506 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:56,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:22:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 14:22:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2024-11-18 14:22:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2024-11-18 14:22:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 77 transitions. [2024-11-18 14:22:56,523 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 77 transitions. Word has length 41 [2024-11-18 14:22:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:56,523 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 77 transitions. [2024-11-18 14:22:56,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-18 14:22:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 77 transitions. [2024-11-18 14:22:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-18 14:22:56,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:56,528 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:56,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:22:56,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:56,729 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:56,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 244570622, now seen corresponding path program 2 times [2024-11-18 14:22:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928484937] [2024-11-18 14:22:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:22:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:56,748 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:22:56,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-18 14:22:56,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:56,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928484937] [2024-11-18 14:22:56,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928484937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:56,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497894298] [2024-11-18 14:22:56,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:22:56,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:56,793 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) [2024-11-18 14:22:56,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:22:56,840 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:22:56,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:56,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:22:56,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-18 14:22:56,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 14:22:57,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497894298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:57,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:57,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-18 14:22:57,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228959194] [2024-11-18 14:22:57,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:57,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 14:22:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 14:22:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:22:57,007 INFO L87 Difference]: Start difference. First operand 50 states and 77 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:22:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:57,087 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2024-11-18 14:22:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:22:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2024-11-18 14:22:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:57,091 INFO L225 Difference]: With dead ends: 79 [2024-11-18 14:22:57,091 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 14:22:57,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:22:57,093 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:57,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:22:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 14:22:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-18 14:22:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-18 14:22:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-18 14:22:57,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 61 [2024-11-18 14:22:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:57,099 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-18 14:22:57,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:22:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-18 14:22:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 14:22:57,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:57,100 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:57,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:22:57,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:57,301 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:57,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 5 times [2024-11-18 14:22:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:57,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318425306] [2024-11-18 14:22:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:22:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:57,318 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 14:22:57,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 79 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-18 14:22:58,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318425306] [2024-11-18 14:22:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318425306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730420375] [2024-11-18 14:22:58,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:22:58,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:58,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:58,017 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) [2024-11-18 14:22:58,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:22:58,060 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 14:22:58,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:58,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-18 14:22:58,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-18 14:22:58,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-18 14:22:59,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730420375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:59,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:59,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 24] total 56 [2024-11-18 14:22:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908102994] [2024-11-18 14:22:59,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:59,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-18 14:22:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-18 14:22:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2861, Unknown=0, NotChecked=0, Total=3080 [2024-11-18 14:22:59,394 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-18 14:23:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:00,231 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2024-11-18 14:23:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 14:23:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) Word has length 55 [2024-11-18 14:23:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:00,232 INFO L225 Difference]: With dead ends: 51 [2024-11-18 14:23:00,232 INFO L226 Difference]: Without dead ends: 40 [2024-11-18 14:23:00,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=644, Invalid=5676, Unknown=0, NotChecked=0, Total=6320 [2024-11-18 14:23:00,234 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:00,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 317 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:23:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-18 14:23:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-11-18 14:23:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-18 14:23:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-18 14:23:00,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 55 [2024-11-18 14:23:00,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:00,242 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-18 14:23:00,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-18 14:23:00,242 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-18 14:23:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-18 14:23:00,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:00,243 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:00,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:23:00,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:00,444 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:00,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 6 times [2024-11-18 14:23:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774268692] [2024-11-18 14:23:00,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:23:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:00,458 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-18 14:23:00,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 149 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-18 14:23:01,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774268692] [2024-11-18 14:23:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774268692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511299211] [2024-11-18 14:23:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:23:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:01,146 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) [2024-11-18 14:23:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:23:01,195 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-18 14:23:01,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:01,200 WARN L253 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-18 14:23:01,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-18 14:23:01,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 29 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:23:02,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511299211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:02,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:02,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 30] total 52 [2024-11-18 14:23:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938225791] [2024-11-18 14:23:02,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:02,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-18 14:23:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-18 14:23:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2434, Unknown=0, NotChecked=0, Total=2652 [2024-11-18 14:23:02,682 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-18 14:23:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:03,615 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2024-11-18 14:23:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-18 14:23:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) Word has length 69 [2024-11-18 14:23:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:03,617 INFO L225 Difference]: With dead ends: 61 [2024-11-18 14:23:03,617 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:23:03,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=5423, Unknown=0, NotChecked=0, Total=6162 [2024-11-18 14:23:03,621 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:03,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 321 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:23:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:23:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2024-11-18 14:23:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-18 14:23:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-18 14:23:03,631 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 69 [2024-11-18 14:23:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:03,631 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-18 14:23:03,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-18 14:23:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-18 14:23:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-18 14:23:03,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:03,632 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:03,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 14:23:03,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:03,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:03,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 7 times [2024-11-18 14:23:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:03,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428493233] [2024-11-18 14:23:03,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:23:04,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428493233] [2024-11-18 14:23:04,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428493233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026213073] [2024-11-18 14:23:04,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:04,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:04,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:04,528 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:04,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:23:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:04,576 WARN L253 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-18 14:23:04,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-18 14:23:05,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:23:06,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026213073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:06,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:06,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 30] total 71 [2024-11-18 14:23:06,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524949581] [2024-11-18 14:23:06,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:06,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-18 14:23:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-18 14:23:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2024-11-18 14:23:06,575 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2024-11-18 14:23:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:07,697 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2024-11-18 14:23:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 14:23:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) Word has length 69 [2024-11-18 14:23:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:07,699 INFO L225 Difference]: With dead ends: 59 [2024-11-18 14:23:07,699 INFO L226 Difference]: Without dead ends: 52 [2024-11-18 14:23:07,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=778, Invalid=8342, Unknown=0, NotChecked=0, Total=9120 [2024-11-18 14:23:07,701 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:07,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 542 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 14:23:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-18 14:23:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2024-11-18 14:23:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-18 14:23:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-18 14:23:07,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 69 [2024-11-18 14:23:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:07,708 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-18 14:23:07,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2024-11-18 14:23:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-18 14:23:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 14:23:07,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:07,709 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:07,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 14:23:07,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-18 14:23:07,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:07,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 8 times [2024-11-18 14:23:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815488382] [2024-11-18 14:23:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:07,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:07,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 156 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-18 14:23:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815488382] [2024-11-18 14:23:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815488382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83079797] [2024-11-18 14:23:08,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:08,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:08,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:08,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:23:08,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:08,543 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:08,545 WARN L253 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-18 14:23:08,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-18 14:23:08,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-18 14:23:10,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83079797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:10,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:10,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 55 [2024-11-18 14:23:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997878927] [2024-11-18 14:23:10,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:10,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-18 14:23:10,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-18 14:23:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2024-11-18 14:23:10,158 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-18 14:23:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:11,011 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-11-18 14:23:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-18 14:23:11,011 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) Word has length 76 [2024-11-18 14:23:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:11,012 INFO L225 Difference]: With dead ends: 62 [2024-11-18 14:23:11,012 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 14:23:11,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=709, Invalid=5771, Unknown=0, NotChecked=0, Total=6480 [2024-11-18 14:23:11,014 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 98 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:11,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 395 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:23:11,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 14:23:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-18 14:23:11,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (19), 10 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-18 14:23:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2024-11-18 14:23:11,021 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 76 [2024-11-18 14:23:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:11,021 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2024-11-18 14:23:11,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-18 14:23:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2024-11-18 14:23:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 14:23:11,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:11,022 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:11,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 14:23:11,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:11,222 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:11,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 403480760, now seen corresponding path program 9 times [2024-11-18 14:23:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:11,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129565520] [2024-11-18 14:23:11,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:11,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:23:11,233 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-18 14:23:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129565520] [2024-11-18 14:23:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129565520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139152913] [2024-11-18 14:23:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:11,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:11,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:23:11,624 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 14:23:11,625 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:11,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-18 14:23:11,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 14:23:11,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-18 14:23:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139152913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:12,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 50 [2024-11-18 14:23:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560053817] [2024-11-18 14:23:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:12,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-18 14:23:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-18 14:23:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2282, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 14:23:12,580 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:23:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:13,177 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-18 14:23:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-18 14:23:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) Word has length 55 [2024-11-18 14:23:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:13,179 INFO L225 Difference]: With dead ends: 65 [2024-11-18 14:23:13,179 INFO L226 Difference]: Without dead ends: 53 [2024-11-18 14:23:13,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2024-11-18 14:23:13,181 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:13,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 263 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:23:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-18 14:23:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-18 14:23:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (18), 10 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-18 14:23:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-11-18 14:23:13,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 55 [2024-11-18 14:23:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:13,188 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-11-18 14:23:13,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-18 14:23:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-11-18 14:23:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-18 14:23:13,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:13,189 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:13,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 14:23:13,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 14:23:13,393 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:13,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 10 times [2024-11-18 14:23:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326235529] [2024-11-18 14:23:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:23:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:13,403 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:23:13,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 48 proven. 194 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-18 14:23:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326235529] [2024-11-18 14:23:14,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326235529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37170525] [2024-11-18 14:23:14,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:23:14,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:14,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:14,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 14:23:14,221 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:23:14,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:14,223 WARN L253 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-18 14:23:14,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-11-18 14:23:14,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-18 14:23:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37170525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:16,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 36] total 74 [2024-11-18 14:23:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387777790] [2024-11-18 14:23:16,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:16,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-18 14:23:16,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-18 14:23:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5125, Unknown=0, NotChecked=0, Total=5402 [2024-11-18 14:23:16,366 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-18 14:23:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:17,676 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-18 14:23:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-18 14:23:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2024-11-18 14:23:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:17,677 INFO L225 Difference]: With dead ends: 63 [2024-11-18 14:23:17,677 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 14:23:17,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2024-11-18 14:23:17,680 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:17,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 585 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 14:23:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 14:23:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2024-11-18 14:23:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (20), 11 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-18 14:23:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2024-11-18 14:23:17,688 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 83 [2024-11-18 14:23:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:17,690 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2024-11-18 14:23:17,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-18 14:23:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2024-11-18 14:23:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-18 14:23:17,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:17,691 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:17,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-18 14:23:17,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 14:23:17,891 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:17,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 11 times [2024-11-18 14:23:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:17,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115658420] [2024-11-18 14:23:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:23:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:17,905 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-18 14:23:17,905 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 23 proven. 223 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2024-11-18 14:23:18,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:18,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115658420] [2024-11-18 14:23:18,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115658420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093158240] [2024-11-18 14:23:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:23:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:18,662 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 14:23:18,724 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-18 14:23:18,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:18,726 WARN L253 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-18 14:23:18,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-18 14:23:19,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-18 14:23:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093158240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:21,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 39] total 80 [2024-11-18 14:23:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568831116] [2024-11-18 14:23:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:21,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-18 14:23:21,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-18 14:23:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6019, Unknown=0, NotChecked=0, Total=6320 [2024-11-18 14:23:21,457 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-18 14:23:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:22,941 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2024-11-18 14:23:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-18 14:23:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) Word has length 90 [2024-11-18 14:23:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:22,942 INFO L225 Difference]: With dead ends: 66 [2024-11-18 14:23:22,942 INFO L226 Difference]: Without dead ends: 59 [2024-11-18 14:23:22,943 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=896, Invalid=10876, Unknown=0, NotChecked=0, Total=11772 [2024-11-18 14:23:22,944 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 152 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:22,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 711 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 14:23:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-18 14:23:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-11-18 14:23:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 10 states have return successors, (22), 12 states have call predecessors, (22), 5 states have call successors, (22) [2024-11-18 14:23:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-11-18 14:23:22,951 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 90 [2024-11-18 14:23:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:22,951 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-11-18 14:23:22,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-18 14:23:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-11-18 14:23:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-18 14:23:22,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:22,952 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:22,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-18 14:23:23,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 14:23:23,152 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:23,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:23,153 INFO L85 PathProgramCache]: Analyzing trace with hash 960528734, now seen corresponding path program 12 times [2024-11-18 14:23:23,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:23,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223057925] [2024-11-18 14:23:23,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:23:23,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:23,177 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-18 14:23:23,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 69 proven. 582 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-18 14:23:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223057925] [2024-11-18 14:23:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223057925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113257545] [2024-11-18 14:23:24,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:23:24,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:24,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:24,767 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:24,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 14:23:24,842 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-18 14:23:24,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:24,845 WARN L253 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-18 14:23:24,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2024-11-18 14:23:25,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 56 proven. 602 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-18 14:23:29,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113257545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:29,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:29,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28, 51] total 108 [2024-11-18 14:23:29,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532703368] [2024-11-18 14:23:29,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:29,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-18 14:23:29,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-18 14:23:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11152, Unknown=0, NotChecked=0, Total=11556 [2024-11-18 14:23:29,051 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-18 14:23:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:31,386 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2024-11-18 14:23:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-18 14:23:31,386 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) Word has length 118 [2024-11-18 14:23:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:31,387 INFO L225 Difference]: With dead ends: 77 [2024-11-18 14:23:31,387 INFO L226 Difference]: Without dead ends: 62 [2024-11-18 14:23:31,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5220 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1842, Invalid=19914, Unknown=0, NotChecked=0, Total=21756 [2024-11-18 14:23:31,389 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 196 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 3868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:31,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 915 Invalid, 3868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3657 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-18 14:23:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-18 14:23:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2024-11-18 14:23:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (24), 13 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-18 14:23:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-18 14:23:31,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 118 [2024-11-18 14:23:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:31,397 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-18 14:23:31,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-18 14:23:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-18 14:23:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-18 14:23:31,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:31,398 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:31,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-18 14:23:31,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-18 14:23:31,601 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:31,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 13 times [2024-11-18 14:23:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188931280] [2024-11-18 14:23:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-18 14:23:32,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188931280] [2024-11-18 14:23:32,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188931280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:32,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257557826] [2024-11-18 14:23:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:32,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:32,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 14:23:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:32,951 WARN L253 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-18 14:23:32,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2024-11-18 14:23:34,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-18 14:23:36,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257557826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:36,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:36,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30, 45] total 106 [2024-11-18 14:23:36,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425019033] [2024-11-18 14:23:36,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:36,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-18 14:23:36,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-18 14:23:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10767, Unknown=0, NotChecked=0, Total=11130 [2024-11-18 14:23:36,969 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2024-11-18 14:23:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:38,984 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2024-11-18 14:23:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-18 14:23:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) Word has length 104 [2024-11-18 14:23:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:38,985 INFO L225 Difference]: With dead ends: 72 [2024-11-18 14:23:38,985 INFO L226 Difference]: Without dead ends: 65 [2024-11-18 14:23:38,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1374, Invalid=18086, Unknown=0, NotChecked=0, Total=19460 [2024-11-18 14:23:38,986 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 164 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 3018 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 3372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 3018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:38,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1027 Invalid, 3372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 3018 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-18 14:23:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-18 14:23:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2024-11-18 14:23:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (26), 14 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-18 14:23:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2024-11-18 14:23:39,001 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 104 [2024-11-18 14:23:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:39,001 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2024-11-18 14:23:39,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2024-11-18 14:23:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2024-11-18 14:23:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-18 14:23:39,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:39,002 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:39,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 14:23:39,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:39,203 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:39,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1447362104, now seen corresponding path program 14 times [2024-11-18 14:23:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076771126] [2024-11-18 14:23:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:39,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:39,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 954 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-18 14:23:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076771126] [2024-11-18 14:23:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076771126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232629712] [2024-11-18 14:23:41,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:41,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:41,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 14:23:41,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:41,532 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:41,535 WARN L253 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 229 conjuncts are in the unsatisfiable core [2024-11-18 14:23:41,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 11 proven. 515 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2024-11-18 14:23:43,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 68 proven. 884 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-11-18 14:23:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232629712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:47,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 32, 60] total 137 [2024-11-18 14:23:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786338209] [2024-11-18 14:23:47,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:47,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-18 14:23:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-18 14:23:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=18141, Unknown=0, NotChecked=0, Total=18632 [2024-11-18 14:23:47,912 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-18 14:23:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:51,442 INFO L93 Difference]: Finished difference Result 85 states and 119 transitions. [2024-11-18 14:23:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-18 14:23:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) Word has length 139 [2024-11-18 14:23:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:51,443 INFO L225 Difference]: With dead ends: 85 [2024-11-18 14:23:51,443 INFO L226 Difference]: Without dead ends: 68 [2024-11-18 14:23:51,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6461 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2445, Invalid=30861, Unknown=0, NotChecked=0, Total=33306 [2024-11-18 14:23:51,446 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 258 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 5704 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 6101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:51,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1484 Invalid, 6101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5704 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-18 14:23:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-18 14:23:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2024-11-18 14:23:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (28), 15 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-18 14:23:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-11-18 14:23:51,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 139 [2024-11-18 14:23:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:51,459 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-11-18 14:23:51,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-18 14:23:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-11-18 14:23:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-18 14:23:51,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:51,460 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:51,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-18 14:23:51,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 14:23:51,661 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:51,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 626974934, now seen corresponding path program 15 times [2024-11-18 14:23:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:51,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463978051] [2024-11-18 14:23:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:51,708 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-18 14:23:51,708 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 242 proven. 855 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-11-18 14:23:53,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463978051] [2024-11-18 14:23:53,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463978051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066286892] [2024-11-18 14:23:53,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:53,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:53,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:53,764 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:53,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 14:23:53,876 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-18 14:23:53,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:53,880 WARN L253 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-11-18 14:23:53,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 12 proven. 632 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-11-18 14:23:55,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 77 proven. 1101 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2024-11-18 14:24:00,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066286892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:00,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:00,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 34, 66] total 138 [2024-11-18 14:24:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876665503] [2024-11-18 14:24:00,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:00,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-18 14:24:00,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-18 14:24:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=18334, Unknown=0, NotChecked=0, Total=18906 [2024-11-18 14:24:00,760 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) [2024-11-18 14:24:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:24:04,466 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2024-11-18 14:24:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-18 14:24:04,466 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) Word has length 153 [2024-11-18 14:24:04,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:24:04,467 INFO L225 Difference]: With dead ends: 89 [2024-11-18 14:24:04,467 INFO L226 Difference]: Without dead ends: 71 [2024-11-18 14:24:04,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7866 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2443, Invalid=31967, Unknown=0, NotChecked=0, Total=34410 [2024-11-18 14:24:04,470 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 228 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 6063 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 6063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:24:04,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1435 Invalid, 6359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 6063 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-18 14:24:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-18 14:24:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2024-11-18 14:24:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 14 states have return successors, (30), 16 states have call predecessors, (30), 5 states have call successors, (30) [2024-11-18 14:24:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2024-11-18 14:24:04,478 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 153 [2024-11-18 14:24:04,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:24:04,478 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2024-11-18 14:24:04,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) [2024-11-18 14:24:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2024-11-18 14:24:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-18 14:24:04,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:24:04,480 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:24:04,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-18 14:24:04,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:04,685 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:24:04,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:24:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1673274616, now seen corresponding path program 16 times [2024-11-18 14:24:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:24:04,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350975223] [2024-11-18 14:24:04,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:04,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:24:04,701 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:04,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 66 proven. 848 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2024-11-18 14:24:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:24:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350975223] [2024-11-18 14:24:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350975223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:24:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706528495] [2024-11-18 14:24:07,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:24:07,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:24:07,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:24:07,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:24:07,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 14:24:07,194 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:24:07,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:24:07,200 WARN L253 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-11-18 14:24:07,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:24:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 13 proven. 761 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2024-11-18 14:24:08,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:24:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 86 proven. 1342 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-11-18 14:24:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706528495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:24:15,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:24:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 36, 72] total 142 [2024-11-18 14:24:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960909751] [2024-11-18 14:24:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:24:15,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-11-18 14:24:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:24:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-11-18 14:24:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=19447, Unknown=0, NotChecked=0, Total=20022 [2024-11-18 14:24:15,095 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 142 states, 138 states have (on average 1.3840579710144927) internal successors, (191), 82 states have internal predecessors, (191), 27 states have call successors, (27), 1 states have call predecessors, (27), 45 states have return successors, (61), 60 states have call predecessors, (61), 27 states have call successors, (61)