./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/indp3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/indp3.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 e95db6aea8df845f112e7d303c04ce64867bd2e800c9279283322a7440e1498c --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:14:44,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:14:44,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:14:44,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:14:44,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:14:44,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:14:44,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:14:44,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:14:44,877 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:14:44,878 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:14:44,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:14:44,878 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:14:44,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:14:44,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:14:44,880 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:14:44,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:14:44,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:14:44,881 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:14:44,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:14:44,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:14:44,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:14:44,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:14:44,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:14:44,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:14:44,883 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:14:44,884 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:14:44,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:14:44,884 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:14:44,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:14:44,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:14:44,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:14:44,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:14:44,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:14:44,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:14:44,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:14:44,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:14:44,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:14:44,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:14:44,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:14:44,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:14:44,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:14:44,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:14:44,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95db6aea8df845f112e7d303c04ce64867bd2e800c9279283322a7440e1498c [2024-11-08 10:14:45,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:14:45,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:14:45,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:14:45,184 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:14:45,184 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:14:45,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/indp3.c [2024-11-08 10:14:46,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:14:46,758 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:14:46,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp3.c [2024-11-08 10:14:46,765 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024dc4038/f4513db4abc0435d83683bfe546d3c3e/FLAG5db9db14d [2024-11-08 10:14:47,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024dc4038/f4513db4abc0435d83683bfe546d3c3e [2024-11-08 10:14:47,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:14:47,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:14:47,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:14:47,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:14:47,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:14:47,155 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616f8e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47, skipping insertion in model container [2024-11-08 10:14:47,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,174 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:14:47,347 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp3.c[588,601] [2024-11-08 10:14:47,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:14:47,373 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:14:47,383 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/indp3.c[588,601] [2024-11-08 10:14:47,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:14:47,406 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:14:47,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47 WrapperNode [2024-11-08 10:14:47,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:14:47,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:14:47,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:14:47,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:14:47,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,438 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2024-11-08 10:14:47,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:14:47,440 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:14:47,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:14:47,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:14:47,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,469 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 8, 8]. 44 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 4 writes are split as follows [0, 0, 4]. [2024-11-08 10:14:47,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:14:47,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:14:47,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:14:47,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:14:47,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (1/1) ... [2024-11-08 10:14:47,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:14:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:14:47,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 10:14:47,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 10:14:47,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:14:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:14:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 10:14:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:14:47,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:14:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:14:47,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:14:47,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:14:47,639 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:14:47,641 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:14:47,835 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 10:14:47,836 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:14:47,847 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:14:47,847 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-08 10:14:47,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:14:47 BoogieIcfgContainer [2024-11-08 10:14:47,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:14:47,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:14:47,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:14:47,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:14:47,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:14:47" (1/3) ... [2024-11-08 10:14:47,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b71bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:14:47, skipping insertion in model container [2024-11-08 10:14:47,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:14:47" (2/3) ... [2024-11-08 10:14:47,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b71bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:14:47, skipping insertion in model container [2024-11-08 10:14:47,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:14:47" (3/3) ... [2024-11-08 10:14:47,856 INFO L112 eAbstractionObserver]: Analyzing ICFG indp3.c [2024-11-08 10:14:47,868 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:14:47,869 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:14:47,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:14:47,922 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;@2690623b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:14:47,922 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:14:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) [2024-11-08 10:14:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:14:47,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:47,929 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:47,930 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:47,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2024-11-08 10:14:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671327619] [2024-11-08 10:14:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:14:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:14:48,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:48,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671327619] [2024-11-08 10:14:48,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671327619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:14:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:14:48,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:14:48,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518468265] [2024-11-08 10:14:48,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:14:48,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:14:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:14:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:14:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:14:48,168 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:14:48,183 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2024-11-08 10:14:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:14:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 10:14:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:14:48,191 INFO L225 Difference]: With dead ends: 50 [2024-11-08 10:14:48,191 INFO L226 Difference]: Without dead ends: 23 [2024-11-08 10:14:48,194 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 [2024-11-08 10:14:48,196 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:14:48,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:14:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-08 10:14:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-08 10:14:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2024-11-08 10:14:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-08 10:14:48,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2024-11-08 10:14:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:14:48,230 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-08 10:14:48,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-08 10:14:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:14:48,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:48,232 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:48,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:14:48,232 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:48,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2024-11-08 10:14:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127167558] [2024-11-08 10:14:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:48,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:14:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:14:48,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127167558] [2024-11-08 10:14:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127167558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:14:48,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:14:48,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:14:48,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984291358] [2024-11-08 10:14:48,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:14:48,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:14:48,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:14:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:14:48,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:14:48,433 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:14:48,517 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-08 10:14:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:14:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 10:14:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:14:48,519 INFO L225 Difference]: With dead ends: 53 [2024-11-08 10:14:48,519 INFO L226 Difference]: Without dead ends: 37 [2024-11-08 10:14:48,521 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 [2024-11-08 10:14:48,522 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:14:48,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:14:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-08 10:14:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2024-11-08 10:14:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2024-11-08 10:14:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-08 10:14:48,533 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2024-11-08 10:14:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:14:48,533 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-08 10:14:48,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-08 10:14:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 10:14:48,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:48,535 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:48,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:14:48,536 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:48,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2024-11-08 10:14:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:48,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857155060] [2024-11-08 10:14:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:14:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271476391] [2024-11-08 10:14:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:48,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:14:48,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:14:48,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:14:48,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:14:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:14:48,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-08 10:14:48,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:14:48,794 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 [2024-11-08 10:14:48,866 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 11 [2024-11-08 10:14:48,902 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 11 [2024-11-08 10:14:48,935 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 11 [2024-11-08 10:14:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:14:49,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:14:49,455 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 56 treesize of output 52 [2024-11-08 10:14:49,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:14:49,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 103 [2024-11-08 10:14:49,558 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-08 10:14:49,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 47 [2024-11-08 10:14:49,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:14:49,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 26 treesize of output 26 [2024-11-08 10:14:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:14:49,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857155060] [2024-11-08 10:14:49,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:14:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271476391] [2024-11-08 10:14:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271476391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:14:49,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:14:49,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2024-11-08 10:14:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947633178] [2024-11-08 10:14:49,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:14:49,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 10:14:49,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:14:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 10:14:49,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:14:49,612 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:14:50,036 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2024-11-08 10:14:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:14:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 10:14:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:14:50,038 INFO L225 Difference]: With dead ends: 77 [2024-11-08 10:14:50,038 INFO L226 Difference]: Without dead ends: 75 [2024-11-08 10:14:50,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:14:50,040 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:14:50,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 121 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:14:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-08 10:14:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2024-11-08 10:14:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-11-08 10:14:50,056 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 24 [2024-11-08 10:14:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:14:50,056 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-11-08 10:14:50,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-11-08 10:14:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 10:14:50,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:50,058 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:50,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:14:50,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:14:50,259 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:50,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1411307230, now seen corresponding path program 2 times [2024-11-08 10:14:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386822644] [2024-11-08 10:14:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:14:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:14:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386822644] [2024-11-08 10:14:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386822644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:14:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223757069] [2024-11-08 10:14:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:14:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:14:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:14:50,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:14:50,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:14:50,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:14:50,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:14:50,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 10:14:50,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:14:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:14:50,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:14:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:14:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223757069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:14:50,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:14:50,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-08 10:14:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569006708] [2024-11-08 10:14:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:14:50,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 10:14:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:14:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 10:14:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-08 10:14:50,765 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:14:51,074 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2024-11-08 10:14:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 10:14:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-08 10:14:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:14:51,076 INFO L225 Difference]: With dead ends: 177 [2024-11-08 10:14:51,078 INFO L226 Difference]: Without dead ends: 122 [2024-11-08 10:14:51,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:14:51,080 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:14:51,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 74 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:14:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-08 10:14:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2024-11-08 10:14:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 states have internal predecessors, (106), 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) [2024-11-08 10:14:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2024-11-08 10:14:51,107 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 28 [2024-11-08 10:14:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:14:51,107 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2024-11-08 10:14:51,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 10:14:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2024-11-08 10:14:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 10:14:51,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:14:51,108 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:14:51,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:14:51,308 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 [2024-11-08 10:14:51,309 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:14:51,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:14:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2120316834, now seen corresponding path program 3 times [2024-11-08 10:14:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:14:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209582106] [2024-11-08 10:14:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:14:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:14:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:14:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:14:51,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:14:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209582106] [2024-11-08 10:14:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209582106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:14:51,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110392857] [2024-11-08 10:14:51,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:14:51,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:14:51,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:14:51,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:14:51,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:14:51,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:14:51,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:14:51,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 10:14:51,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:14:51,623 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 67 treesize of output 54 [2024-11-08 10:14:51,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 22 [2024-11-08 10:14:51,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 [2024-11-08 10:14:56,376 INFO L349 Elim1Store]: treesize reduction 98, result has 24.0 percent of original size [2024-11-08 10:14:56,376 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 5 case distinctions, treesize of input 93 treesize of output 91 [2024-11-08 10:14:56,592 INFO L349 Elim1Store]: treesize reduction 98, result has 24.0 percent of original size [2024-11-08 10:14:56,592 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 5 case distinctions, treesize of input 93 treesize of output 91 [2024-11-08 10:15:00,784 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 11 [2024-11-08 10:15:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:15:00,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:15:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:15:01,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110392857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:15:01,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:15:01,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 14] total 28 [2024-11-08 10:15:01,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209465106] [2024-11-08 10:15:01,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:15:01,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 10:15:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:15:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 10:15:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=624, Unknown=2, NotChecked=0, Total=756 [2024-11-08 10:15:01,479 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 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) [2024-11-08 10:15:03,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:09,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:17,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:21,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:25,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:33,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:36,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-08 10:15:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:15:36,631 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2024-11-08 10:15:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 10:15:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 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 28 [2024-11-08 10:15:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:15:36,633 INFO L225 Difference]: With dead ends: 124 [2024-11-08 10:15:36,633 INFO L226 Difference]: Without dead ends: 94 [2024-11-08 10:15:36,634 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=661, Invalid=3241, Unknown=4, NotChecked=0, Total=3906 [2024-11-08 10:15:36,635 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 419 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 228 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:15:36,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 210 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 654 Invalid, 4 Unknown, 0 Unchecked, 22.4s Time] [2024-11-08 10:15:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-08 10:15:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2024-11-08 10:15:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 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) [2024-11-08 10:15:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2024-11-08 10:15:36,651 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 28 [2024-11-08 10:15:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:15:36,651 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2024-11-08 10:15:36,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 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) [2024-11-08 10:15:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2024-11-08 10:15:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 10:15:36,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:15:36,653 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:15:36,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 10:15:36,856 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 [2024-11-08 10:15:36,857 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:15:36,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:15:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1737020496, now seen corresponding path program 1 times [2024-11-08 10:15:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:15:36,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031266660] [2024-11-08 10:15:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:15:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:15:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:15:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488848764] [2024-11-08 10:15:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:15:36,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:15:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:15:36,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:15:36,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:15:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:15:37,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 10:15:37,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:15:37,060 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 [2024-11-08 10:15:37,108 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 23 treesize of output 11 [2024-11-08 10:15:37,140 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 11 [2024-11-08 10:15:37,184 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 23 treesize of output 11 [2024-11-08 10:15:37,211 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 11 [2024-11-08 10:15:37,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:15:37,278 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 25 treesize of output 20 [2024-11-08 10:15:37,303 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 11 [2024-11-08 10:15:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:15:37,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:15:38,257 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 56 treesize of output 52 [2024-11-08 10:15:38,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:15:38,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 103 [2024-11-08 10:15:38,311 INFO L349 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2024-11-08 10:15:38,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 51 [2024-11-08 10:15:38,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:15:38,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 28 treesize of output 26 [2024-11-08 10:15:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:15:38,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:15:38,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031266660] [2024-11-08 10:15:38,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:15:38,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488848764] [2024-11-08 10:15:38,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488848764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:15:38,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:15:38,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 31 [2024-11-08 10:15:38,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427532611] [2024-11-08 10:15:38,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:15:38,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 10:15:38,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:15:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 10:15:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-11-08 10:15:38,396 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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) [2024-11-08 10:15:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:15:39,383 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2024-11-08 10:15:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 10:15:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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) Word has length 36 [2024-11-08 10:15:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:15:39,384 INFO L225 Difference]: With dead ends: 89 [2024-11-08 10:15:39,384 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 10:15:39,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:15:39,385 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 10:15:39,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 254 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 10:15:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 10:15:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-11-08 10:15:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2024-11-08 10:15:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-08 10:15:39,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 36 [2024-11-08 10:15:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:15:39,396 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-08 10:15:39,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 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) [2024-11-08 10:15:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-08 10:15:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 10:15:39,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:15:39,397 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:15:39,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 10:15:39,598 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 [2024-11-08 10:15:39,598 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:15:39,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:15:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1376996972, now seen corresponding path program 4 times [2024-11-08 10:15:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:15:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597276071] [2024-11-08 10:15:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:15:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:15:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:15:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 10:15:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:15:39,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597276071] [2024-11-08 10:15:39,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597276071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:15:39,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456941060] [2024-11-08 10:15:39,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:15:39,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:15:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:15:39,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:15:39,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:15:39,875 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:15:39,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:15:39,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:15:39,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:15:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 10:15:39,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:15:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 10:15:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456941060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:15:40,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:15:40,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:15:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651357486] [2024-11-08 10:15:40,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:15:40,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:15:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:15:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:15:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:15:40,025 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-11-08 10:15:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:15:40,189 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-11-08 10:15:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 10:15:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 38 [2024-11-08 10:15:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:15:40,190 INFO L225 Difference]: With dead ends: 73 [2024-11-08 10:15:40,190 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 10:15:40,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:15:40,191 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:15:40,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 78 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:15:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 10:15:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2024-11-08 10:15:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 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) [2024-11-08 10:15:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-08 10:15:40,205 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 38 [2024-11-08 10:15:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:15:40,205 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-08 10:15:40,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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) [2024-11-08 10:15:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-08 10:15:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 10:15:40,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:15:40,207 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:15:40,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:15:40,407 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 [2024-11-08 10:15:40,408 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:15:40,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:15:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221586, now seen corresponding path program 5 times [2024-11-08 10:15:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:15:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733042193] [2024-11-08 10:15:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:15:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:15:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:15:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187454573] [2024-11-08 10:15:40,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:15:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:15:40,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:15:40,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 10:15:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process