./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:35:49,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:35:49,135 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:35:49,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:35:49,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:35:49,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:35:49,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:35:49,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:35:49,157 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:35:49,157 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:35:49,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:35:49,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:35:49,158 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:35:49,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:35:49,159 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:35:49,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:35:49,159 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:35:49,160 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:35:49,160 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:35:49,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:35:49,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:35:49,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:35:49,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:35:49,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:35:49,169 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:35:49,169 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:35:49,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:35:49,170 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:35:49,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:35:49,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:35:49,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:35:49,172 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:35:49,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:35:49,172 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:35:49,173 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:35:49,173 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:35:49,173 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:35:49,173 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:35:49,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:35:49,174 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:35:49,174 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:35:49,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:35:49,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2024-10-12 18:35:49,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:35:49,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:35:49,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:35:49,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:35:49,485 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:35:49,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-10-12 18:35:50,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:35:51,130 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:35:51,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-10-12 18:35:51,142 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dba9252e/e796660855be4c3eb3647518833ac209/FLAG8fc694d32 [2024-10-12 18:35:51,161 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dba9252e/e796660855be4c3eb3647518833ac209 [2024-10-12 18:35:51,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:35:51,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:35:51,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:35:51,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:35:51,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:35:51,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2074ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51, skipping insertion in model container [2024-10-12 18:35:51,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,185 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:35:51,311 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2024-10-12 18:35:51,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:35:51,337 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:35:51,347 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2024-10-12 18:35:51,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:35:51,363 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:35:51,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51 WrapperNode [2024-10-12 18:35:51,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:35:51,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:35:51,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:35:51,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:35:51,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,389 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-10-12 18:35:51,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:35:51,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:35:51,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:35:51,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:35:51,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,400 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,409 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]. [2024-10-12 18:35:51,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,417 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:35:51,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:35:51,418 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:35:51,418 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:35:51,419 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (1/1) ... [2024-10-12 18:35:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:35:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:51,449 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) [2024-10-12 18:35:51,457 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 [2024-10-12 18:35:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:35:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:35:51,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:35:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:35:51,548 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:35:51,550 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:35:51,627 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-12 18:35:51,627 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:35:51,642 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:35:51,642 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 18:35:51,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:35:51 BoogieIcfgContainer [2024-10-12 18:35:51,643 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:35:51,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:35:51,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:35:51,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:35:51,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:35:51" (1/3) ... [2024-10-12 18:35:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44136a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:35:51, skipping insertion in model container [2024-10-12 18:35:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:35:51" (2/3) ... [2024-10-12 18:35:51,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44136a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:35:51, skipping insertion in model container [2024-10-12 18:35:51,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:35:51" (3/3) ... [2024-10-12 18:35:51,649 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2024-10-12 18:35:51,662 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:35:51,663 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 18:35:51,706 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:35:51,715 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;@6a6dcfc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:35:51,716 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 18:35:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 18:35:51,726 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:51,726 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:51,726 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:51,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash -593791358, now seen corresponding path program 1 times [2024-10-12 18:35:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419203690] [2024-10-12 18:35:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419203690] [2024-10-12 18:35:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419203690] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:35:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:35:52,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 18:35:52,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240878634] [2024-10-12 18:35:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:35:52,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 18:35:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:52,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 18:35:52,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-12 18:35:52,267 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:52,382 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2024-10-12 18:35:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 18:35:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 18:35:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:52,390 INFO L225 Difference]: With dead ends: 26 [2024-10-12 18:35:52,390 INFO L226 Difference]: Without dead ends: 10 [2024-10-12 18:35:52,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-12 18:35:52,396 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:52,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-10-12 18:35:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-10-12 18:35:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-10-12 18:35:52,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2024-10-12 18:35:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:52,423 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-10-12 18:35:52,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-10-12 18:35:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-12 18:35:52,424 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:52,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:52,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:35:52,425 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:52,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1017158531, now seen corresponding path program 1 times [2024-10-12 18:35:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964040121] [2024-10-12 18:35:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:52,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:52,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964040121] [2024-10-12 18:35:52,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964040121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:52,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752474239] [2024-10-12 18:35:52,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:52,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:52,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:52,542 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) [2024-10-12 18:35:52,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:35:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:52,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 18:35:52,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:52,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:52,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752474239] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:52,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:52,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-12 18:35:52,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151836588] [2024-10-12 18:35:52,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:52,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-12 18:35:52,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:52,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-12 18:35:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-12 18:35:52,798 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:53,008 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2024-10-12 18:35:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:35:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-12 18:35:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:53,014 INFO L225 Difference]: With dead ends: 32 [2024-10-12 18:35:53,014 INFO L226 Difference]: Without dead ends: 27 [2024-10-12 18:35:53,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-12 18:35:53,016 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:53,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-12 18:35:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2024-10-12 18:35:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-10-12 18:35:53,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 9 [2024-10-12 18:35:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:53,025 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-10-12 18:35:53,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-10-12 18:35:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 18:35:53,026 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:53,026 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:53,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 18:35:53,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:53,232 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:53,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash -307074158, now seen corresponding path program 1 times [2024-10-12 18:35:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:53,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167478822] [2024-10-12 18:35:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:53,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:53,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:53,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167478822] [2024-10-12 18:35:53,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167478822] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:53,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667918078] [2024-10-12 18:35:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:53,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:53,581 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) [2024-10-12 18:35:53,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:35:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:53,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 18:35:53,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:53,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667918078] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:53,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:53,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-10-12 18:35:53,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090956495] [2024-10-12 18:35:53,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:53,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 18:35:53,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 18:35:53,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-10-12 18:35:53,879 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:54,236 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-10-12 18:35:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-12 18:35:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 18:35:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:54,237 INFO L225 Difference]: With dead ends: 39 [2024-10-12 18:35:54,238 INFO L226 Difference]: Without dead ends: 24 [2024-10-12 18:35:54,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2024-10-12 18:35:54,239 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:54,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 16 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-12 18:35:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2024-10-12 18:35:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2024-10-12 18:35:54,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2024-10-12 18:35:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:54,247 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2024-10-12 18:35:54,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2024-10-12 18:35:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 18:35:54,248 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:54,248 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:54,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 18:35:54,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-12 18:35:54,451 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:54,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1195192002, now seen corresponding path program 2 times [2024-10-12 18:35:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:54,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565505448] [2024-10-12 18:35:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:54,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565505448] [2024-10-12 18:35:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565505448] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:54,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488881000] [2024-10-12 18:35:54,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:35:54,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:54,532 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) [2024-10-12 18:35:54,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:35:54,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:35:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:35:54,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-12 18:35:54,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:54,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488881000] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:54,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-12 18:35:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296473305] [2024-10-12 18:35:54,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:54,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:35:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:35:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:35:54,793 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:55,308 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2024-10-12 18:35:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-12 18:35:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-12 18:35:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:55,310 INFO L225 Difference]: With dead ends: 70 [2024-10-12 18:35:55,311 INFO L226 Difference]: Without dead ends: 65 [2024-10-12 18:35:55,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2024-10-12 18:35:55,313 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 120 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:55,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 72 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-12 18:35:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2024-10-12 18:35:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2024-10-12 18:35:55,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 12 [2024-10-12 18:35:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:55,330 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2024-10-12 18:35:55,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2024-10-12 18:35:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 18:35:55,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:55,332 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:55,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:35:55,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:55,536 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:55,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1481823070, now seen corresponding path program 2 times [2024-10-12 18:35:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:55,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198432682] [2024-10-12 18:35:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:55,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:35:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198432682] [2024-10-12 18:35:55,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198432682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785157009] [2024-10-12 18:35:55,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:35:55,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:55,631 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) [2024-10-12 18:35:55,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:35:55,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:35:55,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:35:55,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 18:35:55,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:35:55,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:35:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785157009] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:55,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-12 18:35:55,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599008421] [2024-10-12 18:35:55,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:55,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 18:35:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 18:35:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-12 18:35:55,834 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:56,023 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2024-10-12 18:35:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 18:35:56,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-12 18:35:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:56,024 INFO L225 Difference]: With dead ends: 64 [2024-10-12 18:35:56,024 INFO L226 Difference]: Without dead ends: 54 [2024-10-12 18:35:56,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-10-12 18:35:56,025 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:56,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-12 18:35:56,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-10-12 18:35:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2024-10-12 18:35:56,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 13 [2024-10-12 18:35:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:56,044 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2024-10-12 18:35:56,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2024-10-12 18:35:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 18:35:56,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:56,045 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:56,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 18:35:56,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:56,249 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:56,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1847797890, now seen corresponding path program 3 times [2024-10-12 18:35:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92489157] [2024-10-12 18:35:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:56,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92489157] [2024-10-12 18:35:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92489157] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729747739] [2024-10-12 18:35:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:35:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:56,844 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) [2024-10-12 18:35:56,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 18:35:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-12 18:35:56,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:35:56,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 18:35:56,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:57,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:35:57,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729747739] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:57,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:57,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2024-10-12 18:35:57,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457064152] [2024-10-12 18:35:57,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:57,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-12 18:35:57,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-12 18:35:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-10-12 18:35:57,439 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:59,018 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2024-10-12 18:35:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-12 18:35:59,018 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 18:35:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:59,019 INFO L225 Difference]: With dead ends: 85 [2024-10-12 18:35:59,019 INFO L226 Difference]: Without dead ends: 64 [2024-10-12 18:35:59,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2024-10-12 18:35:59,020 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:59,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:35:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-12 18:35:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2024-10-12 18:35:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2024-10-12 18:35:59,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 14 [2024-10-12 18:35:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:59,037 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2024-10-12 18:35:59,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2024-10-12 18:35:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 18:35:59,038 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:59,038 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:59,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 18:35:59,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:59,239 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:59,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -904677104, now seen corresponding path program 4 times [2024-10-12 18:35:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:59,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231582972] [2024-10-12 18:35:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:59,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:35:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 18:35:59,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:35:59,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231582972] [2024-10-12 18:35:59,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231582972] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:35:59,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977458958] [2024-10-12 18:35:59,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 18:35:59,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:59,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:35:59,354 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) [2024-10-12 18:35:59,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 18:35:59,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 18:35:59,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:35:59,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-12 18:35:59,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:35:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 18:35:59,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:35:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 18:35:59,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977458958] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:35:59,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:35:59,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-10-12 18:35:59,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205408620] [2024-10-12 18:35:59,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:35:59,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 18:35:59,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:35:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 18:35:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-10-12 18:35:59,535 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:35:59,762 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2024-10-12 18:35:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 18:35:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 18:35:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:35:59,763 INFO L225 Difference]: With dead ends: 76 [2024-10-12 18:35:59,763 INFO L226 Difference]: Without dead ends: 61 [2024-10-12 18:35:59,763 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-10-12 18:35:59,764 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:35:59,764 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:35:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-12 18:35:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2024-10-12 18:35:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-10-12 18:35:59,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 16 [2024-10-12 18:35:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:35:59,781 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-10-12 18:35:59,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:35:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-10-12 18:35:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 18:35:59,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:35:59,782 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:35:59,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 18:35:59,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:35:59,987 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:35:59,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:35:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash 988492593, now seen corresponding path program 5 times [2024-10-12 18:35:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:35:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360258416] [2024-10-12 18:35:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:35:59,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:35:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360258416] [2024-10-12 18:36:00,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360258416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278784160] [2024-10-12 18:36:00,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 18:36:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:00,098 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) [2024-10-12 18:36:00,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 18:36:00,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-12 18:36:00,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:00,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-12 18:36:00,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:00,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278784160] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:00,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-10-12 18:36:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385912952] [2024-10-12 18:36:00,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:00,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 18:36:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 18:36:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-10-12 18:36:00,369 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:02,640 INFO L93 Difference]: Finished difference Result 146 states and 215 transitions. [2024-10-12 18:36:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-12 18:36:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 18:36:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:02,642 INFO L225 Difference]: With dead ends: 146 [2024-10-12 18:36:02,642 INFO L226 Difference]: Without dead ends: 137 [2024-10-12 18:36:02,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1353, Invalid=3617, Unknown=0, NotChecked=0, Total=4970 [2024-10-12 18:36:02,645 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 316 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:02,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 112 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:36:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-12 18:36:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 70. [2024-10-12 18:36:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 97 transitions. [2024-10-12 18:36:02,671 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 97 transitions. Word has length 16 [2024-10-12 18:36:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:02,671 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 97 transitions. [2024-10-12 18:36:02,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 97 transitions. [2024-10-12 18:36:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 18:36:02,672 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:02,672 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:02,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 18:36:02,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:02,873 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:02,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1519806738, now seen corresponding path program 6 times [2024-10-12 18:36:02,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:02,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530423042] [2024-10-12 18:36:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:03,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:03,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530423042] [2024-10-12 18:36:03,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530423042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:03,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571963326] [2024-10-12 18:36:03,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 18:36:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:03,385 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) [2024-10-12 18:36:03,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 18:36:03,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-12 18:36:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:03,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-12 18:36:03,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:03,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571963326] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:04,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 32 [2024-10-12 18:36:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722748586] [2024-10-12 18:36:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:04,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 18:36:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 18:36:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:36:04,445 INFO L87 Difference]: Start difference. First operand 70 states and 97 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:06,203 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2024-10-12 18:36:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-12 18:36:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-12 18:36:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:06,205 INFO L225 Difference]: With dead ends: 121 [2024-10-12 18:36:06,205 INFO L226 Difference]: Without dead ends: 95 [2024-10-12 18:36:06,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=353, Invalid=2509, Unknown=0, NotChecked=0, Total=2862 [2024-10-12 18:36:06,207 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:06,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 60 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:36:06,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-12 18:36:06,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2024-10-12 18:36:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 68 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2024-10-12 18:36:06,227 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 17 [2024-10-12 18:36:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:06,227 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2024-10-12 18:36:06,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2024-10-12 18:36:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 18:36:06,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:06,228 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:06,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 18:36:06,429 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,SelfDestructingSolverStorable8 [2024-10-12 18:36:06,430 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:06,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2026879586, now seen corresponding path program 7 times [2024-10-12 18:36:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:06,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964983756] [2024-10-12 18:36:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:06,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 18:36:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964983756] [2024-10-12 18:36:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964983756] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002730608] [2024-10-12 18:36:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 18:36:06,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:06,583 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) [2024-10-12 18:36:06,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 18:36:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:06,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-12 18:36:06,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 18:36:06,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 18:36:06,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002730608] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:06,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:06,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-10-12 18:36:06,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507710392] [2024-10-12 18:36:06,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:06,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-12 18:36:06,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:06,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-12 18:36:06,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-10-12 18:36:06,867 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:07,205 INFO L93 Difference]: Finished difference Result 111 states and 152 transitions. [2024-10-12 18:36:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-12 18:36:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-12 18:36:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:07,207 INFO L225 Difference]: With dead ends: 111 [2024-10-12 18:36:07,207 INFO L226 Difference]: Without dead ends: 93 [2024-10-12 18:36:07,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-10-12 18:36:07,208 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:07,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:36:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-12 18:36:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2024-10-12 18:36:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 75 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2024-10-12 18:36:07,236 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 19 [2024-10-12 18:36:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:07,237 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2024-10-12 18:36:07,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2024-10-12 18:36:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 18:36:07,238 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:07,238 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:07,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-12 18:36:07,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-12 18:36:07,442 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:07,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash 39467650, now seen corresponding path program 8 times [2024-10-12 18:36:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:07,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742554265] [2024-10-12 18:36:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742554265] [2024-10-12 18:36:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742554265] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843328495] [2024-10-12 18:36:07,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:36:07,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:07,990 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) [2024-10-12 18:36:07,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 18:36:08,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:36:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:08,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-12 18:36:08,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:08,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:09,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843328495] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:09,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:09,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 36 [2024-10-12 18:36:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684724396] [2024-10-12 18:36:09,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:09,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-12 18:36:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-12 18:36:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 18:36:09,099 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:12,786 INFO L93 Difference]: Finished difference Result 136 states and 175 transitions. [2024-10-12 18:36:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-12 18:36:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-12 18:36:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:12,787 INFO L225 Difference]: With dead ends: 136 [2024-10-12 18:36:12,787 INFO L226 Difference]: Without dead ends: 103 [2024-10-12 18:36:12,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=438, Invalid=3594, Unknown=0, NotChecked=0, Total=4032 [2024-10-12 18:36:12,789 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:12,789 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 91 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 18:36:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-12 18:36:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 70. [2024-10-12 18:36:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:12,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 97 transitions. [2024-10-12 18:36:12,820 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 97 transitions. Word has length 20 [2024-10-12 18:36:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:12,820 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 97 transitions. [2024-10-12 18:36:12,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 97 transitions. [2024-10-12 18:36:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 18:36:12,821 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:12,821 INFO L215 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:12,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 18:36:13,025 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,SelfDestructingSolverStorable10 [2024-10-12 18:36:13,026 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:13,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1355894851, now seen corresponding path program 9 times [2024-10-12 18:36:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806084357] [2024-10-12 18:36:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:36:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806084357] [2024-10-12 18:36:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806084357] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271572170] [2024-10-12 18:36:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:36:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:13,225 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) [2024-10-12 18:36:13,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 18:36:13,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 18:36:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:13,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 18:36:13,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:36:13,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:36:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271572170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:13,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 31 [2024-10-12 18:36:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177186404] [2024-10-12 18:36:13,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:13,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-12 18:36:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-12 18:36:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2024-10-12 18:36:13,688 INFO L87 Difference]: Start difference. First operand 70 states and 97 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:15,240 INFO L93 Difference]: Finished difference Result 140 states and 196 transitions. [2024-10-12 18:36:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-12 18:36:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-12 18:36:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:15,242 INFO L225 Difference]: With dead ends: 140 [2024-10-12 18:36:15,242 INFO L226 Difference]: Without dead ends: 123 [2024-10-12 18:36:15,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=958, Invalid=4012, Unknown=0, NotChecked=0, Total=4970 [2024-10-12 18:36:15,244 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 152 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:15,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 110 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 18:36:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-12 18:36:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2024-10-12 18:36:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 83 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-10-12 18:36:15,300 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 21 [2024-10-12 18:36:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:15,300 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-10-12 18:36:15,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-10-12 18:36:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 18:36:15,301 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:15,301 INFO L215 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:15,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 18:36:15,504 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,SelfDestructingSolverStorable11 [2024-10-12 18:36:15,504 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:15,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2001136323, now seen corresponding path program 3 times [2024-10-12 18:36:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:15,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559444450] [2024-10-12 18:36:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:15,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559444450] [2024-10-12 18:36:15,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559444450] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397291564] [2024-10-12 18:36:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:36:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:15,704 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) [2024-10-12 18:36:15,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 18:36:15,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-10-12 18:36:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:15,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 18:36:15,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:15,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:16,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397291564] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:16,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:16,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-12 18:36:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22998423] [2024-10-12 18:36:16,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:16,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 18:36:16,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 18:36:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:36:16,187 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:22,801 INFO L93 Difference]: Finished difference Result 496 states and 670 transitions. [2024-10-12 18:36:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-12 18:36:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-12 18:36:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:22,805 INFO L225 Difference]: With dead ends: 496 [2024-10-12 18:36:22,805 INFO L226 Difference]: Without dead ends: 469 [2024-10-12 18:36:22,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2024-10-12 18:36:22,807 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 823 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:22,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 362 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-12 18:36:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-10-12 18:36:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 124. [2024-10-12 18:36:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2024-10-12 18:36:22,885 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 21 [2024-10-12 18:36:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:22,885 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2024-10-12 18:36:22,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2024-10-12 18:36:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 18:36:22,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:22,886 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:22,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 18:36:23,087 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,SelfDestructingSolverStorable12 [2024-10-12 18:36:23,088 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:23,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash 493700754, now seen corresponding path program 10 times [2024-10-12 18:36:23,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:23,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790418663] [2024-10-12 18:36:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790418663] [2024-10-12 18:36:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790418663] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:24,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493765499] [2024-10-12 18:36:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 18:36:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:24,175 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) [2024-10-12 18:36:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 18:36:24,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 18:36:24,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:24,265 WARN L253 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-12 18:36:24,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:25,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:25,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493765499] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:25,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:25,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 15] total 45 [2024-10-12 18:36:25,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681809703] [2024-10-12 18:36:25,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:25,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-12 18:36:25,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:25,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-12 18:36:25,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2024-10-12 18:36:25,916 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:29,712 INFO L93 Difference]: Finished difference Result 212 states and 263 transitions. [2024-10-12 18:36:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-12 18:36:29,713 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-12 18:36:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:29,714 INFO L225 Difference]: With dead ends: 212 [2024-10-12 18:36:29,714 INFO L226 Difference]: Without dead ends: 186 [2024-10-12 18:36:29,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=547, Invalid=4145, Unknown=0, NotChecked=0, Total=4692 [2024-10-12 18:36:29,716 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:29,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 68 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-12 18:36:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-10-12 18:36:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2024-10-12 18:36:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2024-10-12 18:36:29,808 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 23 [2024-10-12 18:36:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:29,808 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2024-10-12 18:36:29,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.391304347826087) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2024-10-12 18:36:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 18:36:29,809 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:29,809 INFO L215 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:29,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 18:36:30,010 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,SelfDestructingSolverStorable13 [2024-10-12 18:36:30,010 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:30,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash 67109809, now seen corresponding path program 11 times [2024-10-12 18:36:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:30,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351231587] [2024-10-12 18:36:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:30,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351231587] [2024-10-12 18:36:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351231587] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:30,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421503021] [2024-10-12 18:36:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 18:36:30,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:30,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:30,249 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) [2024-10-12 18:36:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 18:36:30,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-12 18:36:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:30,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 18:36:30,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:30,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 18:36:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421503021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:30,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-10-12 18:36:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015211174] [2024-10-12 18:36:30,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:30,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-12 18:36:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-12 18:36:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2024-10-12 18:36:30,832 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:45,343 INFO L93 Difference]: Finished difference Result 464 states and 621 transitions. [2024-10-12 18:36:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-10-12 18:36:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-12 18:36:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:45,345 INFO L225 Difference]: With dead ends: 464 [2024-10-12 18:36:45,346 INFO L226 Difference]: Without dead ends: 452 [2024-10-12 18:36:45,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8326 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=6168, Invalid=16182, Unknown=0, NotChecked=0, Total=22350 [2024-10-12 18:36:45,349 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1116 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:45,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 376 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-12 18:36:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-10-12 18:36:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 129. [2024-10-12 18:36:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.34375) internal successors, (172), 128 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 172 transitions. [2024-10-12 18:36:45,430 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 172 transitions. Word has length 24 [2024-10-12 18:36:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:45,430 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 172 transitions. [2024-10-12 18:36:45,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 172 transitions. [2024-10-12 18:36:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 18:36:45,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:45,430 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:45,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-12 18:36:45,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:45,634 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:45,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash 605681698, now seen corresponding path program 12 times [2024-10-12 18:36:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40627468] [2024-10-12 18:36:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 18:36:45,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:45,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40627468] [2024-10-12 18:36:45,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40627468] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:45,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136970403] [2024-10-12 18:36:45,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 18:36:45,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:45,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:45,770 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) [2024-10-12 18:36:45,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 18:36:45,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-12 18:36:45,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:45,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-12 18:36:45,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 18:36:45,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-12 18:36:46,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136970403] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:46,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:46,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2024-10-12 18:36:46,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755012851] [2024-10-12 18:36:46,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:46,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 18:36:46,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:46,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 18:36:46,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:36:46,143 INFO L87 Difference]: Start difference. First operand 129 states and 172 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:46,827 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2024-10-12 18:36:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-12 18:36:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-12 18:36:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:46,829 INFO L225 Difference]: With dead ends: 238 [2024-10-12 18:36:46,829 INFO L226 Difference]: Without dead ends: 176 [2024-10-12 18:36:46,829 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2024-10-12 18:36:46,830 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:46,830 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:36:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-12 18:36:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2024-10-12 18:36:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.3509933774834437) internal successors, (204), 151 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 204 transitions. [2024-10-12 18:36:46,919 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 204 transitions. Word has length 25 [2024-10-12 18:36:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:46,919 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 204 transitions. [2024-10-12 18:36:46,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 204 transitions. [2024-10-12 18:36:46,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:36:46,919 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:46,920 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:46,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-12 18:36:47,120 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,SelfDestructingSolverStorable15 [2024-10-12 18:36:47,120 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:47,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash -553341822, now seen corresponding path program 13 times [2024-10-12 18:36:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:47,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711336419] [2024-10-12 18:36:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:47,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711336419] [2024-10-12 18:36:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711336419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934276107] [2024-10-12 18:36:47,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 18:36:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:47,728 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) [2024-10-12 18:36:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-12 18:36:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:47,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-12 18:36:47,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:48,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:36:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934276107] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:48,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2024-10-12 18:36:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770036118] [2024-10-12 18:36:48,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:48,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-12 18:36:48,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-12 18:36:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2123, Unknown=0, NotChecked=0, Total=2352 [2024-10-12 18:36:48,955 INFO L87 Difference]: Start difference. First operand 152 states and 204 transitions. Second operand has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:36:52,390 INFO L93 Difference]: Finished difference Result 260 states and 318 transitions. [2024-10-12 18:36:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-12 18:36:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-12 18:36:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:36:52,392 INFO L225 Difference]: With dead ends: 260 [2024-10-12 18:36:52,392 INFO L226 Difference]: Without dead ends: 226 [2024-10-12 18:36:52,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=624, Invalid=5076, Unknown=0, NotChecked=0, Total=5700 [2024-10-12 18:36:52,393 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 18:36:52,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 73 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 18:36:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-12 18:36:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 138. [2024-10-12 18:36:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.364963503649635) internal successors, (187), 137 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 187 transitions. [2024-10-12 18:36:52,489 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 187 transitions. Word has length 26 [2024-10-12 18:36:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:36:52,489 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 187 transitions. [2024-10-12 18:36:52,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 48 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:36:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 187 transitions. [2024-10-12 18:36:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 18:36:52,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:36:52,489 INFO L215 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:36:52,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-12 18:36:52,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-12 18:36:52,690 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:36:52,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:36:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash -572741629, now seen corresponding path program 14 times [2024-10-12 18:36:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:36:52,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791748844] [2024-10-12 18:36:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:36:52,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:36:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:36:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:36:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:36:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791748844] [2024-10-12 18:36:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791748844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:36:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939267793] [2024-10-12 18:36:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 18:36:52,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:36:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:36:52,921 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) [2024-10-12 18:36:52,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-12 18:36:52,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 18:36:52,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:36:52,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-12 18:36:52,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:36:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:36:52,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:36:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:36:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939267793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:36:53,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:36:53,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-10-12 18:36:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986541044] [2024-10-12 18:36:53,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:36:53,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-12 18:36:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:36:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-12 18:36:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 18:36:53,494 INFO L87 Difference]: Start difference. First operand 138 states and 187 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:37:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:37:23,497 INFO L93 Difference]: Finished difference Result 584 states and 760 transitions. [2024-10-12 18:37:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2024-10-12 18:37:23,497 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-12 18:37:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:37:23,500 INFO L225 Difference]: With dead ends: 584 [2024-10-12 18:37:23,500 INFO L226 Difference]: Without dead ends: 556 [2024-10-12 18:37:23,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17387 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=10628, Invalid=33262, Unknown=0, NotChecked=0, Total=43890 [2024-10-12 18:37:23,503 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1400 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-12 18:37:23,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 417 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-12 18:37:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-10-12 18:37:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 153. [2024-10-12 18:37:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.355263157894737) internal successors, (206), 152 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:37:23,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2024-10-12 18:37:23,637 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 27 [2024-10-12 18:37:23,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:37:23,637 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2024-10-12 18:37:23,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 18:37:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2024-10-12 18:37:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:37:23,639 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:37:23,639 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:37:23,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-12 18:37:23,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-12 18:37:23,841 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 18:37:23,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:37:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 488824464, now seen corresponding path program 15 times [2024-10-12 18:37:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:37:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8443671] [2024-10-12 18:37:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:37:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:37:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:37:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:37:24,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:37:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8443671] [2024-10-12 18:37:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8443671] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:37:24,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411133445] [2024-10-12 18:37:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 18:37:24,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:37:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:37:24,059 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:37:24,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-12 18:37:24,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 18:37:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 18:37:24,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-12 18:37:24,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:37:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:37:24,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:37:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-12 18:37:24,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411133445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:37:24,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:37:24,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-12 18:37:24,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676624035] [2024-10-12 18:37:24,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:37:24,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 18:37:24,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:37:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 18:37:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 18:37:24,469 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)