./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.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/array-fpi/indp2.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 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:03:29,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:03:29,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:03:29,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:03:29,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:03:29,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:03:29,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:03:29,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:03:29,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:03:29,195 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:03:29,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:03:29,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:03:29,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:03:29,198 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:03:29,199 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:03:29,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:03:29,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:03:29,200 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:03:29,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:03:29,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:03:29,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:03:29,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:03:29,201 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:03:29,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:03:29,204 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:03:29,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:03:29,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:03:29,205 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:03:29,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:03:29,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:03:29,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:03:29,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:03:29,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:03:29,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:03:29,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:03:29,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:03:29,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:03:29,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:03:29,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:03:29,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:03:29,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:03:29,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:03:29,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22448626353835b24dede83f92858a925e988e04b05430a9ca91763be927cf92 [2024-10-12 15:03:29,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:03:29,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:03:29,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:03:29,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:03:29,489 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:03:29,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c [2024-10-12 15:03:30,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:03:31,738 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:03:31,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp2.c [2024-10-12 15:03:31,748 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b1738c87/e32b683c42e84de28be2b0e593f472f0/FLAGedb529634 [2024-10-12 15:03:31,763 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b1738c87/e32b683c42e84de28be2b0e593f472f0 [2024-10-12 15:03:31,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:03:31,767 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:03:31,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:03:31,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:03:31,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:03:31,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:03:31" (1/1) ... [2024-10-12 15:03:31,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33297280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:31, skipping insertion in model container [2024-10-12 15:03:31,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:03:31" (1/1) ... [2024-10-12 15:03:31,797 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:03:31,982 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/array-fpi/indp2.c[588,601] [2024-10-12 15:03:32,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:03:32,011 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:03:32,024 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/array-fpi/indp2.c[588,601] [2024-10-12 15:03:32,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:03:32,054 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:03:32,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32 WrapperNode [2024-10-12 15:03:32,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:03:32,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:03:32,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:03:32,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:03:32,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,100 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-10-12 15:03:32,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:03:32,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:03:32,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:03:32,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:03:32,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,116 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,131 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 8, 6]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 3 writes are split as follows [0, 0, 3]. [2024-10-12 15:03:32,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,151 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,152 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:03:32,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:03:32,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:03:32,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:03:32,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (1/1) ... [2024-10-12 15:03:32,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:03:32,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:32,189 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 15:03:32,192 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 15:03:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:03:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:03:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:03:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:03:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:03:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:03:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:03:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:03:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:03:32,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:03:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:03:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:03:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:03:32,333 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:03:32,334 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:03:32,501 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-12 15:03:32,502 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:03:32,527 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:03:32,527 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-12 15:03:32,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:03:32 BoogieIcfgContainer [2024-10-12 15:03:32,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:03:32,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:03:32,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:03:32,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:03:32,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:03:31" (1/3) ... [2024-10-12 15:03:32,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de7c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:03:32, skipping insertion in model container [2024-10-12 15:03:32,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:03:32" (2/3) ... [2024-10-12 15:03:32,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de7c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:03:32, skipping insertion in model container [2024-10-12 15:03:32,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:03:32" (3/3) ... [2024-10-12 15:03:32,535 INFO L112 eAbstractionObserver]: Analyzing ICFG indp2.c [2024-10-12 15:03:32,550 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:03:32,551 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:03:32,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:03:32,616 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;@1b06ee22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:03:32,617 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:03:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) 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 15:03:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 15:03:32,628 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:32,628 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:32,629 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:32,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:32,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1482130284, now seen corresponding path program 1 times [2024-10-12 15:03:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837816280] [2024-10-12 15:03:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:32,799 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 15:03:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837816280] [2024-10-12 15:03:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837816280] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:03:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:03:32,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:03:32,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686661370] [2024-10-12 15:03:32,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:03:32,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:03:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:03:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:03:32,825 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15:03:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:32,851 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2024-10-12 15:03:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:03:32,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15:03:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:32,859 INFO L225 Difference]: With dead ends: 33 [2024-10-12 15:03:32,859 INFO L226 Difference]: Without dead ends: 15 [2024-10-12 15:03:32,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:03:32,865 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:32,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:03:32,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-12 15:03:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-12 15:03:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 15:03:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-12 15:03:32,893 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 13 [2024-10-12 15:03:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:32,893 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-12 15:03:32,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15:03:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-12 15:03:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 15:03:32,894 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:32,894 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:32,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:03:32,895 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:32,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash -781065706, now seen corresponding path program 1 times [2024-10-12 15:03:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338472576] [2024-10-12 15:03:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:33,071 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 15:03:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338472576] [2024-10-12 15:03:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338472576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:03:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:03:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 15:03:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822274990] [2024-10-12 15:03:33,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:03:33,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 15:03:33,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 15:03:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:03:33,075 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:03:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:33,128 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-10-12 15:03:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 15:03:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:03:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:33,129 INFO L225 Difference]: With dead ends: 33 [2024-10-12 15:03:33,129 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 15:03:33,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 15:03:33,131 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:33,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:03:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 15:03:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2024-10-12 15:03:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 15:03:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-12 15:03:33,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-10-12 15:03:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:33,140 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-12 15:03:33,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 15:03:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-12 15:03:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 15:03:33,141 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:33,141 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:33,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 15:03:33,142 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:33,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash -389034316, now seen corresponding path program 1 times [2024-10-12 15:03:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:33,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007938397] [2024-10-12 15:03:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:03:33,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435283940] [2024-10-12 15:03:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:33,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:33,201 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 15:03:33,202 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 15:03:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:33,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-12 15:03:33,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:33,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-10-12 15:03:33,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-12 15:03:33,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-12 15:03:33,591 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 15:03:33,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:33,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-12 15:03:33,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-12 15:03:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:03:33,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:33,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007938397] [2024-10-12 15:03:33,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:03:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435283940] [2024-10-12 15:03:33,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435283940] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:33,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:03:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-10-12 15:03:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13944175] [2024-10-12 15:03:33,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:33,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-12 15:03:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-12 15:03:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-12 15:03:33,745 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 15:03:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:33,903 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-10-12 15:03:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:03:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 15:03:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:33,904 INFO L225 Difference]: With dead ends: 41 [2024-10-12 15:03:33,904 INFO L226 Difference]: Without dead ends: 39 [2024-10-12 15:03:33,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:03:33,906 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:33,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 76 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:03:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-12 15:03:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2024-10-12 15:03:33,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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 15:03:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-12 15:03:33,917 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2024-10-12 15:03:33,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:33,918 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-12 15:03:33,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 15:03:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-12 15:03:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 15:03:33,919 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:33,920 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:33,936 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 15:03:34,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:34,122 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:34,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -906786412, now seen corresponding path program 2 times [2024-10-12 15:03:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144521180] [2024-10-12 15:03:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:03:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144521180] [2024-10-12 15:03:34,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144521180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:03:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211264821] [2024-10-12 15:03:34,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:03:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:34,350 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 15:03:34,351 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 15:03:34,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:03:34,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:03:34,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:03:34,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 15:03:34,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 15:03:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211264821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:34,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:03:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-10-12 15:03:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589755272] [2024-10-12 15:03:34,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:34,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 15:03:34,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 15:03:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:03:34,520 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 15:03:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:34,643 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-12 15:03:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:03:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 18 [2024-10-12 15:03:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:34,645 INFO L225 Difference]: With dead ends: 61 [2024-10-12 15:03:34,645 INFO L226 Difference]: Without dead ends: 35 [2024-10-12 15:03:34,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-10-12 15:03:34,646 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:34,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 43 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:03:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-12 15:03:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2024-10-12 15:03:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 15:03:34,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-12 15:03:34,657 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2024-10-12 15:03:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:34,657 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-12 15:03:34,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 15:03:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-12 15:03:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 15:03:34,658 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:34,658 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:34,677 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 15:03:34,858 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,SelfDestructingSolverStorable3 [2024-10-12 15:03:34,859 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:34,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1236756649, now seen corresponding path program 3 times [2024-10-12 15:03:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:34,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578085840] [2024-10-12 15:03:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:34,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:03:35,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:35,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578085840] [2024-10-12 15:03:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578085840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:03:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972411917] [2024-10-12 15:03:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:03:35,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:35,020 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 15:03:35,022 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 15:03:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:03:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:03:35,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:03:35,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:03:35,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 15:03:35,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972411917] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:35,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:03:35,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:03:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796497113] [2024-10-12 15:03:35,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:35,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:03:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:03:35,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:03:35,246 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 15:03:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:35,385 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2024-10-12 15:03:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-12 15:03:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 15:03:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:35,389 INFO L225 Difference]: With dead ends: 72 [2024-10-12 15:03:35,389 INFO L226 Difference]: Without dead ends: 55 [2024-10-12 15:03:35,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-12 15:03:35,390 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:35,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 44 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:03:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-12 15:03:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2024-10-12 15:03:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 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 15:03:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-10-12 15:03:35,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 20 [2024-10-12 15:03:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:35,403 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-10-12 15:03:35,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 15:03:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-10-12 15:03:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:03:35,406 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:35,406 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:35,422 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 15:03:35,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:35,610 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:35,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1799832222, now seen corresponding path program 1 times [2024-10-12 15:03:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821729369] [2024-10-12 15:03:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:35,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:03:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392614025] [2024-10-12 15:03:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:35,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:35,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:35,667 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 15:03:35,668 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 15:03:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:35,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-12 15:03:35,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:35,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:03:35,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:35,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2024-10-12 15:03:35,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-10-12 15:03:35,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-12 15:03:35,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-12 15:03:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:03:35,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:36,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-12 15:03:36,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-12 15:03:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:03:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821729369] [2024-10-12 15:03:36,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:03:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392614025] [2024-10-12 15:03:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392614025] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:36,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:03:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2024-10-12 15:03:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858179846] [2024-10-12 15:03:36,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:36,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 15:03:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 15:03:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-10-12 15:03:36,244 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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 15:03:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:36,662 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2024-10-12 15:03:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-12 15:03:36,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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 22 [2024-10-12 15:03:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:36,664 INFO L225 Difference]: With dead ends: 89 [2024-10-12 15:03:36,664 INFO L226 Difference]: Without dead ends: 73 [2024-10-12 15:03:36,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:03:36,665 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:36,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 163 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 15:03:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-12 15:03:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2024-10-12 15:03:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 states have internal predecessors, (53), 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 15:03:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-10-12 15:03:36,676 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2024-10-12 15:03:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:36,677 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-10-12 15:03:36,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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 15:03:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-10-12 15:03:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-12 15:03:36,678 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:36,678 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:36,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 15:03:36,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:36,883 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:36,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:36,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2140844940, now seen corresponding path program 4 times [2024-10-12 15:03:36,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:36,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171319525] [2024-10-12 15:03:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:03:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467347258] [2024-10-12 15:03:36,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:03:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:36,928 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 15:03:36,930 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 15:03:36,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:03:37,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:03:37,007 WARN L253 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-12 15:03:37,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:37,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-10-12 15:03:37,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 42 [2024-10-12 15:03:37,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:37,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2024-10-12 15:03:37,302 INFO L349 Elim1Store]: treesize reduction 87, result has 29.8 percent of original size [2024-10-12 15:03:37,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 74 treesize of output 75 [2024-10-12 15:03:37,434 INFO L349 Elim1Store]: treesize reduction 57, result has 56.2 percent of original size [2024-10-12 15:03:37,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 80 treesize of output 115 [2024-10-12 15:03:37,648 INFO L349 Elim1Store]: treesize reduction 81, result has 47.4 percent of original size [2024-10-12 15:03:37,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 120 treesize of output 152 [2024-10-12 15:03:37,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:37,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2024-10-12 15:03:37,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:37,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2024-10-12 15:03:37,994 INFO L349 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2024-10-12 15:03:37,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 29 [2024-10-12 15:03:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:03:38,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:03:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171319525] [2024-10-12 15:03:39,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:03:39,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467347258] [2024-10-12 15:03:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467347258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:39,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:03:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-10-12 15:03:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034530370] [2024-10-12 15:03:39,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:39,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 15:03:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 15:03:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=735, Unknown=1, NotChecked=0, Total=870 [2024-10-12 15:03:39,185 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 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 15:03:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:43,046 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2024-10-12 15:03:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-12 15:03:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 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 22 [2024-10-12 15:03:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:43,048 INFO L225 Difference]: With dead ends: 105 [2024-10-12 15:03:43,050 INFO L226 Difference]: Without dead ends: 103 [2024-10-12 15:03:43,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=567, Invalid=3338, Unknown=1, NotChecked=0, Total=3906 [2024-10-12 15:03:43,052 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 135 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:43,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 278 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-12 15:03:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-12 15:03:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2024-10-12 15:03:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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 15:03:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-10-12 15:03:43,077 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 22 [2024-10-12 15:03:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:43,078 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-10-12 15:03:43,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 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 15:03:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-10-12 15:03:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-12 15:03:43,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:43,079 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:43,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 15:03:43,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:43,280 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:43,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1439949402, now seen corresponding path program 5 times [2024-10-12 15:03:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536114358] [2024-10-12 15:03:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:03:43,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:43,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536114358] [2024-10-12 15:03:43,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536114358] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:03:43,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465898543] [2024-10-12 15:03:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:03:43,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:43,445 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 15:03:43,446 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 15:03:43,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-12 15:03:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:03:43,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:03:43,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:03:43,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-12 15:03:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465898543] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:43,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:03:43,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:03:43,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425583125] [2024-10-12 15:03:43,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:43,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:03:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:03:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:03:43,665 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:43,820 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2024-10-12 15:03:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 15:03:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:43,821 INFO L225 Difference]: With dead ends: 139 [2024-10-12 15:03:43,822 INFO L226 Difference]: Without dead ends: 100 [2024-10-12 15:03:43,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-10-12 15:03:43,823 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:43,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 66 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:03:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-12 15:03:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2024-10-12 15:03:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 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 15:03:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-10-12 15:03:43,850 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 23 [2024-10-12 15:03:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:43,851 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-10-12 15:03:43,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-10-12 15:03:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 15:03:43,851 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:43,852 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:43,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 15:03:44,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:44,056 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:44,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash 930263625, now seen corresponding path program 6 times [2024-10-12 15:03:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:44,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042364199] [2024-10-12 15:03:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:03:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:03:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042364199] [2024-10-12 15:03:44,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042364199] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:03:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777814905] [2024-10-12 15:03:44,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:03:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:44,244 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 15:03:44,245 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 15:03:44,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-12 15:03:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:03:44,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-12 15:03:44,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:03:44,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:03:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 15:03:44,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777814905] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:03:44,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:03:44,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-12 15:03:44,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800896435] [2024-10-12 15:03:44,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:03:44,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 15:03:44,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:03:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 15:03:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-12 15:03:44,475 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:03:44,700 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2024-10-12 15:03:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-12 15:03:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:03:44,701 INFO L225 Difference]: With dead ends: 107 [2024-10-12 15:03:44,701 INFO L226 Difference]: Without dead ends: 81 [2024-10-12 15:03:44,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:03:44,702 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:03:44,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 121 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:03:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-12 15:03:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2024-10-12 15:03:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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 15:03:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-10-12 15:03:44,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 24 [2024-10-12 15:03:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:03:44,735 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-10-12 15:03:44,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 15:03:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-10-12 15:03:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 15:03:44,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:03:44,737 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:03:44,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 15:03:44,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:44,938 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:03:44,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:03:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash -174949482, now seen corresponding path program 7 times [2024-10-12 15:03:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:03:44,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221454694] [2024-10-12 15:03:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:03:44,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:03:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:03:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924319219] [2024-10-12 15:03:44,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 15:03:44,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:03:44,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:03:44,982 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 15:03:44,982 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 15:03:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:03:45,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-12 15:03:45,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:03:45,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-10-12 15:03:45,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-12 15:03:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:45,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2024-10-12 15:03:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:45,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 52 [2024-10-12 15:03:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:45,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 57 [2024-10-12 15:03:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:03:45,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 57 [2024-10-12 15:03:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 15:03:45,573 INFO L349 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2024-10-12 15:03:45,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 70 treesize of output 94 [2024-10-12 15:03:54,260 WARN L286 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 84 DAG size of output: 82 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)