./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci03.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 be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:22:37,561 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:22:37,622 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:22:37,626 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:22:37,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:22:37,673 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:22:37,675 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:22:37,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:22:37,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:22:37,678 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:22:37,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:22:37,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:22:37,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:22:37,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:22:37,681 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:22:37,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:22:37,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:22:37,684 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:22:37,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:22:37,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:22:37,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:22:37,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:22:37,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:22:37,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:22:37,687 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:22:37,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:22:37,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:22:37,703 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:22:37,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:22:37,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:22:37,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:22:37,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:22:37,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:22:37,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:22:37,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:22:37,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:22:37,706 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:22:37,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:22:37,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:22:37,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:22:37,707 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:22:37,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:22:37,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2024-11-18 14:22:37,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:22:37,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:22:37,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:22:37,985 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:22:37,986 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:22:37,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci03.c [2024-11-18 14:22:39,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:22:39,663 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:22:39,664 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c [2024-11-18 14:22:39,670 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013546942/09c61520353f45d6bfaee497fed77624/FLAG623dc0045 [2024-11-18 14:22:39,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/013546942/09c61520353f45d6bfaee497fed77624 [2024-11-18 14:22:39,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:22:39,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:22:39,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:22:39,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:22:39,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:22:39,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b39aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39, skipping insertion in model container [2024-11-18 14:22:39,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,709 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:22:39,892 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2024-11-18 14:22:39,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:22:39,910 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:22:39,925 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2024-11-18 14:22:39,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:22:39,942 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:22:39,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39 WrapperNode [2024-11-18 14:22:39,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:22:39,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:22:39,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:22:39,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:22:39,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,974 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2024-11-18 14:22:39,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:22:39,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:22:39,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:22:39,975 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:22:39,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:39,987 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,002 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 14:22:40,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:22:40,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:22:40,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:22:40,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:22:40,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (1/1) ... [2024-11-18 14:22:40,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:22:40,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:40,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 14:22:40,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 14:22:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2024-11-18 14:22:40,079 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2024-11-18 14:22:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:22:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:22:40,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:22:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:22:40,134 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:22:40,135 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:22:40,240 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-18 14:22:40,240 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:22:40,255 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:22:40,255 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:22:40,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:22:40 BoogieIcfgContainer [2024-11-18 14:22:40,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:22:40,259 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:22:40,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:22:40,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:22:40,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:22:39" (1/3) ... [2024-11-18 14:22:40,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516fa7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:22:40, skipping insertion in model container [2024-11-18 14:22:40,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:22:39" (2/3) ... [2024-11-18 14:22:40,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516fa7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:22:40, skipping insertion in model container [2024-11-18 14:22:40,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:22:40" (3/3) ... [2024-11-18 14:22:40,268 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2024-11-18 14:22:40,285 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:22:40,286 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:22:40,336 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:22:40,341 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;@51568cc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:22:40,342 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:22:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:22:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-18 14:22:40,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:40,353 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:40,353 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:40,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1939714822, now seen corresponding path program 1 times [2024-11-18 14:22:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591152219] [2024-11-18 14:22:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:22:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:40,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591152219] [2024-11-18 14:22:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591152219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:22:40,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:22:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:22:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542031923] [2024-11-18 14:22:40,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:22:40,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:22:40,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:22:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:40,696 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:22:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:40,801 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-18 14:22:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:22:40,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-18 14:22:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:40,811 INFO L225 Difference]: With dead ends: 31 [2024-11-18 14:22:40,812 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 14:22:40,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:40,820 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:40,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 14:22:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-11-18 14:22:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:22:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-18 14:22:40,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2024-11-18 14:22:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:40,867 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-18 14:22:40,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:22:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-18 14:22:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 14:22:40,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:40,870 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:40,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:22:40,870 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:40,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash 692912656, now seen corresponding path program 1 times [2024-11-18 14:22:40,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:40,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133806053] [2024-11-18 14:22:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:40,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:22:40,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:40,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133806053] [2024-11-18 14:22:40,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133806053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:22:40,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:22:40,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:22:40,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713642420] [2024-11-18 14:22:40,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:22:40,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:22:40,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:22:40,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:40,992 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:22:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:41,077 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-11-18 14:22:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:22:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-18 14:22:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:41,079 INFO L225 Difference]: With dead ends: 25 [2024-11-18 14:22:41,079 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 14:22:41,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:22:41,081 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:41,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 14:22:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2024-11-18 14:22:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:22:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-18 14:22:41,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2024-11-18 14:22:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:41,114 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-18 14:22:41,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:22:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-18 14:22:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 14:22:41,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:41,116 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:41,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:22:41,117 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:41,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:41,118 INFO L85 PathProgramCache]: Analyzing trace with hash 453332055, now seen corresponding path program 1 times [2024-11-18 14:22:41,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:41,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513327828] [2024-11-18 14:22:41,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:41,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:22:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513327828] [2024-11-18 14:22:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513327828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259858928] [2024-11-18 14:22:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:41,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:41,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:41,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:22:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:41,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:22:41,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:22:41,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 14:22:41,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259858928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:41,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:41,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2024-11-18 14:22:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363528645] [2024-11-18 14:22:41,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:41,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:22:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:22:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:22:41,676 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:22:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:41,813 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2024-11-18 14:22:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:22:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 24 [2024-11-18 14:22:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:41,815 INFO L225 Difference]: With dead ends: 43 [2024-11-18 14:22:41,816 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 14:22:41,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:22:41,818 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:41,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 14:22:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-18 14:22:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-18 14:22:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-11-18 14:22:41,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 24 [2024-11-18 14:22:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:41,827 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-11-18 14:22:41,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:22:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-11-18 14:22:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-18 14:22:41,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:41,830 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:41,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:22:42,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:42,031 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:42,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1186000891, now seen corresponding path program 1 times [2024-11-18 14:22:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313831323] [2024-11-18 14:22:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-18 14:22:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313831323] [2024-11-18 14:22:42,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313831323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470480005] [2024-11-18 14:22:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:22:42,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:42,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:42,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:22:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:22:42,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:22:42,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-18 14:22:42,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:22:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470480005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:42,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-11-18 14:22:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41327394] [2024-11-18 14:22:42,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:42,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:22:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:22:42,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:22:42,794 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-18 14:22:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:42,971 INFO L93 Difference]: Finished difference Result 45 states and 75 transitions. [2024-11-18 14:22:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:22:42,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2024-11-18 14:22:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:42,974 INFO L225 Difference]: With dead ends: 45 [2024-11-18 14:22:42,976 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 14:22:42,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:22:42,978 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:42,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 14:22:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-11-18 14:22:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 25 states have internal predecessors, (25), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (30), 9 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-18 14:22:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 61 transitions. [2024-11-18 14:22:42,999 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 61 transitions. Word has length 52 [2024-11-18 14:22:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:43,000 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 61 transitions. [2024-11-18 14:22:43,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-18 14:22:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 61 transitions. [2024-11-18 14:22:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-18 14:22:43,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:43,007 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 15, 11, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:43,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:22:43,209 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 [2024-11-18 14:22:43,209 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:43,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash 843019629, now seen corresponding path program 2 times [2024-11-18 14:22:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:43,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834388875] [2024-11-18 14:22:43,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:22:43,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:43,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:22:43,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2024-11-18 14:22:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834388875] [2024-11-18 14:22:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834388875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037956718] [2024-11-18 14:22:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:22:43,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:43,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:43,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:22:43,640 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:22:43,640 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:43,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:22:43,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2024-11-18 14:22:43,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 69 proven. 427 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2024-11-18 14:22:44,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037956718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:44,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:44,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-18 14:22:44,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8615706] [2024-11-18 14:22:44,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:44,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 14:22:44,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:44,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 14:22:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-18 14:22:44,786 INFO L87 Difference]: Start difference. First operand 36 states and 61 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-18 14:22:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:44,938 INFO L93 Difference]: Finished difference Result 55 states and 111 transitions. [2024-11-18 14:22:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:22:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) Word has length 158 [2024-11-18 14:22:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:44,941 INFO L225 Difference]: With dead ends: 55 [2024-11-18 14:22:44,942 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:22:44,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 309 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:22:44,943 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:44,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:22:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2024-11-18 14:22:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (56), 13 states have call predecessors, (56), 8 states have call successors, (56) [2024-11-18 14:22:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2024-11-18 14:22:44,956 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 158 [2024-11-18 14:22:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:44,956 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2024-11-18 14:22:44,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (17), 8 states have call predecessors, (17), 11 states have call successors, (17) [2024-11-18 14:22:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2024-11-18 14:22:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2024-11-18 14:22:44,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:44,969 INFO L215 NwaCegarLoop]: trace histogram [59, 59, 41, 29, 29, 29, 29, 29, 29, 29, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:44,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:22:45,172 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 [2024-11-18 14:22:45,173 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:45,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1718675215, now seen corresponding path program 3 times [2024-11-18 14:22:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:45,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527967828] [2024-11-18 14:22:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:22:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:45,202 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 14:22:45,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9288 backedges. 1080 proven. 43 refuted. 0 times theorem prover too weak. 8165 trivial. 0 not checked. [2024-11-18 14:22:45,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527967828] [2024-11-18 14:22:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527967828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:45,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803439604] [2024-11-18 14:22:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:22:45,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:45,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:45,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:45,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:22:45,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 14:22:45,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:45,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:22:45,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9288 backedges. 2073 proven. 13 refuted. 0 times theorem prover too weak. 7202 trivial. 0 not checked. [2024-11-18 14:22:45,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9288 backedges. 1262 proven. 60 refuted. 0 times theorem prover too weak. 7966 trivial. 0 not checked. [2024-11-18 14:22:46,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803439604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:46,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:46,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-11-18 14:22:46,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489926821] [2024-11-18 14:22:46,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:46,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-18 14:22:46,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-18 14:22:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:22:46,740 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (14), 4 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-18 14:22:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:46,844 INFO L93 Difference]: Finished difference Result 93 states and 240 transitions. [2024-11-18 14:22:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:22:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (14), 4 states have call predecessors, (14), 7 states have call successors, (14) Word has length 400 [2024-11-18 14:22:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:46,846 INFO L225 Difference]: With dead ends: 93 [2024-11-18 14:22:46,846 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 14:22:46,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 791 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:22:46,853 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:46,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 75 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:22:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 14:22:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2024-11-18 14:22:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 8 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (51), 13 states have call predecessors, (51), 8 states have call successors, (51) [2024-11-18 14:22:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 92 transitions. [2024-11-18 14:22:46,876 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 92 transitions. Word has length 400 [2024-11-18 14:22:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:46,876 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 92 transitions. [2024-11-18 14:22:46,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (14), 4 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-18 14:22:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 92 transitions. [2024-11-18 14:22:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2024-11-18 14:22:46,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:46,888 INFO L215 NwaCegarLoop]: trace histogram [71, 71, 61, 35, 35, 35, 35, 35, 35, 35, 26, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:46,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:22:47,091 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 [2024-11-18 14:22:47,092 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:47,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:47,093 INFO L85 PathProgramCache]: Analyzing trace with hash 482273333, now seen corresponding path program 4 times [2024-11-18 14:22:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:47,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920426721] [2024-11-18 14:22:47,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:22:47,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:47,151 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:22:47,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 1256 proven. 2490 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2024-11-18 14:22:47,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920426721] [2024-11-18 14:22:47,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920426721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:47,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130671469] [2024-11-18 14:22:47,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:22:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:47,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:47,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:22:48,064 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:22:48,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:48,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:22:48,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 4694 proven. 170 refuted. 0 times theorem prover too weak. 9286 trivial. 0 not checked. [2024-11-18 14:22:48,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14150 backedges. 506 proven. 2500 refuted. 0 times theorem prover too weak. 11144 trivial. 0 not checked. [2024-11-18 14:22:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130671469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:50,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:50,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 15] total 27 [2024-11-18 14:22:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361172460] [2024-11-18 14:22:50,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:50,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 14:22:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 14:22:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:22:50,300 INFO L87 Difference]: Start difference. First operand 48 states and 92 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-18 14:22:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:50,910 INFO L93 Difference]: Finished difference Result 140 states and 339 transitions. [2024-11-18 14:22:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-18 14:22:50,911 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) Word has length 492 [2024-11-18 14:22:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:50,913 INFO L225 Difference]: With dead ends: 140 [2024-11-18 14:22:50,913 INFO L226 Difference]: Without dead ends: 96 [2024-11-18 14:22:50,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 975 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=2102, Unknown=0, NotChecked=0, Total=2756 [2024-11-18 14:22:50,923 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:50,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 203 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:22:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-18 14:22:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-18 14:22:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 66 states have internal predecessors, (73), 17 states have call successors, (17), 14 states have call predecessors, (17), 9 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2024-11-18 14:22:50,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 133 transitions. [2024-11-18 14:22:50,945 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 133 transitions. Word has length 492 [2024-11-18 14:22:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:50,945 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 133 transitions. [2024-11-18 14:22:50,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 21 states have call successors, (28), 2 states have call predecessors, (28), 14 states have return successors, (39), 17 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-18 14:22:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 133 transitions. [2024-11-18 14:22:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2024-11-18 14:22:50,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:50,965 INFO L215 NwaCegarLoop]: trace histogram [97, 97, 78, 48, 48, 48, 48, 48, 48, 48, 30, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:50,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 14:22:51,166 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 [2024-11-18 14:22:51,167 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:51,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1230230680, now seen corresponding path program 5 times [2024-11-18 14:22:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513012806] [2024-11-18 14:22:51,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:22:51,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:51,296 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2024-11-18 14:22:51,297 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 3735 proven. 1741 refuted. 0 times theorem prover too weak. 20663 trivial. 0 not checked. [2024-11-18 14:22:52,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:52,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513012806] [2024-11-18 14:22:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513012806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075401514] [2024-11-18 14:22:52,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:22:52,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:52,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:52,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:52,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:22:52,399 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2024-11-18 14:22:52,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:52,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-18 14:22:52,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 11426 proven. 865 refuted. 0 times theorem prover too weak. 13848 trivial. 0 not checked. [2024-11-18 14:22:52,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 3888 proven. 1940 refuted. 0 times theorem prover too weak. 20311 trivial. 0 not checked. [2024-11-18 14:22:56,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075401514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:56,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:56,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 23] total 28 [2024-11-18 14:22:56,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316959842] [2024-11-18 14:22:56,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:56,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:22:56,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:56,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:22:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:22:56,706 INFO L87 Difference]: Start difference. First operand 96 states and 133 transitions. Second operand has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) [2024-11-18 14:22:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:22:57,094 INFO L93 Difference]: Finished difference Result 201 states and 301 transitions. [2024-11-18 14:22:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-18 14:22:57,097 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) Word has length 665 [2024-11-18 14:22:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:22:57,100 INFO L225 Difference]: With dead ends: 201 [2024-11-18 14:22:57,101 INFO L226 Difference]: Without dead ends: 111 [2024-11-18 14:22:57,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1368 GetRequests, 1314 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2024-11-18 14:22:57,103 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:22:57,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 221 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:22:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-18 14:22:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-11-18 14:22:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 66 states have internal predecessors, (72), 18 states have call successors, (18), 14 states have call predecessors, (18), 9 states have return successors, (43), 16 states have call predecessors, (43), 18 states have call successors, (43) [2024-11-18 14:22:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2024-11-18 14:22:57,119 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 665 [2024-11-18 14:22:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:22:57,120 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2024-11-18 14:22:57,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.25) internal successors, (91), 28 states have internal predecessors, (91), 21 states have call successors, (28), 2 states have call predecessors, (28), 12 states have return successors, (37), 14 states have call predecessors, (37), 21 states have call successors, (37) [2024-11-18 14:22:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2024-11-18 14:22:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2024-11-18 14:22:57,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:22:57,123 INFO L215 NwaCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:22:57,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:22:57,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:57,324 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:22:57,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:22:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -45194381, now seen corresponding path program 6 times [2024-11-18 14:22:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:22:57,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622326677] [2024-11-18 14:22:57,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:22:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:22:57,385 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-18 14:22:57,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 508 proven. 1816 refuted. 0 times theorem prover too weak. 10063 trivial. 0 not checked. [2024-11-18 14:22:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:22:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622326677] [2024-11-18 14:22:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622326677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:22:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892006789] [2024-11-18 14:22:57,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:22:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:22:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:22:57,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:22:57,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:22:57,853 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-18 14:22:57,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:22:57,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 14:22:57,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:22:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 508 proven. 1816 refuted. 0 times theorem prover too weak. 10063 trivial. 0 not checked. [2024-11-18 14:22:57,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:22:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 512 proven. 1869 refuted. 0 times theorem prover too weak. 10006 trivial. 0 not checked. [2024-11-18 14:22:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892006789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:22:59,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:22:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 18 [2024-11-18 14:22:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646336800] [2024-11-18 14:22:59,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:22:59,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 14:22:59,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:22:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 14:22:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:22:59,936 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-18 14:23:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:00,071 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2024-11-18 14:23:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:23:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) Word has length 461 [2024-11-18 14:23:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:00,076 INFO L225 Difference]: With dead ends: 106 [2024-11-18 14:23:00,076 INFO L226 Difference]: Without dead ends: 102 [2024-11-18 14:23:00,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 913 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:23:00,079 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:00,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 99 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:23:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-18 14:23:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-18 14:23:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 69 states have internal predecessors, (75), 19 states have call successors, (19), 14 states have call predecessors, (19), 10 states have return successors, (53), 18 states have call predecessors, (53), 19 states have call successors, (53) [2024-11-18 14:23:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 147 transitions. [2024-11-18 14:23:00,100 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 147 transitions. Word has length 461 [2024-11-18 14:23:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:00,103 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 147 transitions. [2024-11-18 14:23:00,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 13 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 10 states have call predecessors, (22), 13 states have call successors, (22) [2024-11-18 14:23:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 147 transitions. [2024-11-18 14:23:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 966 [2024-11-18 14:23:00,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:00,110 INFO L215 NwaCegarLoop]: trace histogram [141, 141, 114, 70, 70, 70, 70, 70, 70, 70, 44, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:00,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 14:23:00,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:00,310 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:00,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1817430884, now seen corresponding path program 7 times [2024-11-18 14:23:00,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:00,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326303838] [2024-11-18 14:23:00,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:00,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 2125 proven. 7600 refuted. 0 times theorem prover too weak. 45856 trivial. 0 not checked. [2024-11-18 14:23:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:02,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326303838] [2024-11-18 14:23:02,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326303838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:02,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304528395] [2024-11-18 14:23:02,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:23:02,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:02,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:02,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:23:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:23:02,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 14:23:02,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 28939 proven. 3803 refuted. 0 times theorem prover too weak. 22839 trivial. 0 not checked. [2024-11-18 14:23:03,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 2437 proven. 8547 refuted. 0 times theorem prover too weak. 44597 trivial. 0 not checked. [2024-11-18 14:23:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304528395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:09,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:09,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 36 [2024-11-18 14:23:09,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840578970] [2024-11-18 14:23:09,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:09,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-18 14:23:09,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:09,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-18 14:23:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 14:23:09,182 INFO L87 Difference]: Start difference. First operand 102 states and 147 transitions. Second operand has 36 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 30 states have call successors, (36), 2 states have call predecessors, (36), 16 states have return successors, (49), 17 states have call predecessors, (49), 30 states have call successors, (49) [2024-11-18 14:23:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:09,881 INFO L93 Difference]: Finished difference Result 221 states and 366 transitions. [2024-11-18 14:23:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-18 14:23:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 30 states have call successors, (36), 2 states have call predecessors, (36), 16 states have return successors, (49), 17 states have call predecessors, (49), 30 states have call successors, (49) Word has length 965 [2024-11-18 14:23:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:09,886 INFO L225 Difference]: With dead ends: 221 [2024-11-18 14:23:09,886 INFO L226 Difference]: Without dead ends: 125 [2024-11-18 14:23:09,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1988 GetRequests, 1908 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1076, Invalid=3346, Unknown=0, NotChecked=0, Total=4422 [2024-11-18 14:23:09,892 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 306 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:09,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 213 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:23:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-18 14:23:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2024-11-18 14:23:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 83 states have internal predecessors, (91), 23 states have call successors, (23), 19 states have call predecessors, (23), 10 states have return successors, (58), 18 states have call predecessors, (58), 23 states have call successors, (58) [2024-11-18 14:23:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 172 transitions. [2024-11-18 14:23:09,923 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 172 transitions. Word has length 965 [2024-11-18 14:23:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:09,927 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 172 transitions. [2024-11-18 14:23:09,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 36 states have internal predecessors, (116), 30 states have call successors, (36), 2 states have call predecessors, (36), 16 states have return successors, (49), 17 states have call predecessors, (49), 30 states have call successors, (49) [2024-11-18 14:23:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 172 transitions. [2024-11-18 14:23:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2024-11-18 14:23:09,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:09,935 INFO L215 NwaCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:09,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:23:10,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:23:10,136 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:10,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2070327020, now seen corresponding path program 8 times [2024-11-18 14:23:10,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020650108] [2024-11-18 14:23:10,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:10,267 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:10,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3187 proven. 6174 refuted. 0 times theorem prover too weak. 34253 trivial. 0 not checked. [2024-11-18 14:23:11,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020650108] [2024-11-18 14:23:11,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020650108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:11,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684394606] [2024-11-18 14:23:11,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:23:11,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:11,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:11,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:23:12,137 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:23:12,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:12,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 14:23:12,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3735 proven. 6599 refuted. 0 times theorem prover too weak. 33280 trivial. 0 not checked. [2024-11-18 14:23:12,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:23:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3735 proven. 6746 refuted. 0 times theorem prover too weak. 33133 trivial. 0 not checked. [2024-11-18 14:23:18,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684394606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:23:18,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:23:18,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 35] total 40 [2024-11-18 14:23:18,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846740123] [2024-11-18 14:23:18,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:23:18,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 14:23:18,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:23:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 14:23:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:23:18,415 INFO L87 Difference]: Start difference. First operand 121 states and 172 transitions. Second operand has 40 states, 40 states have (on average 3.05) internal successors, (122), 40 states have internal predecessors, (122), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) [2024-11-18 14:23:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:23:19,196 INFO L93 Difference]: Finished difference Result 272 states and 464 transitions. [2024-11-18 14:23:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-18 14:23:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.05) internal successors, (122), 40 states have internal predecessors, (122), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) Word has length 856 [2024-11-18 14:23:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:23:19,199 INFO L225 Difference]: With dead ends: 272 [2024-11-18 14:23:19,203 INFO L226 Difference]: Without dead ends: 157 [2024-11-18 14:23:19,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1779 GetRequests, 1688 SyntacticMatches, 17 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1360, Invalid=4340, Unknown=0, NotChecked=0, Total=5700 [2024-11-18 14:23:19,206 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 320 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:23:19,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 247 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:23:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-18 14:23:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 135. [2024-11-18 14:23:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 97 states have (on average 1.041237113402062) internal successors, (101), 93 states have internal predecessors, (101), 27 states have call successors, (27), 22 states have call predecessors, (27), 10 states have return successors, (66), 19 states have call predecessors, (66), 27 states have call successors, (66) [2024-11-18 14:23:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2024-11-18 14:23:19,229 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 856 [2024-11-18 14:23:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:23:19,230 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2024-11-18 14:23:19,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.05) internal successors, (122), 40 states have internal predecessors, (122), 33 states have call successors, (37), 1 states have call predecessors, (37), 18 states have return successors, (51), 19 states have call predecessors, (51), 33 states have call successors, (51) [2024-11-18 14:23:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2024-11-18 14:23:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2024-11-18 14:23:19,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:23:19,235 INFO L215 NwaCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:23:19,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 14:23:19,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:19,436 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:23:19,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:23:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash -425340118, now seen corresponding path program 9 times [2024-11-18 14:23:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:23:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584499612] [2024-11-18 14:23:19,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:23:19,774 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2024-11-18 14:23:19,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 3489 proven. 9630 refuted. 0 times theorem prover too weak. 19977 trivial. 0 not checked. [2024-11-18 14:23:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:23:31,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584499612] [2024-11-18 14:23:31,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584499612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:23:31,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342298181] [2024-11-18 14:23:31,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:23:31,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:23:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:23:31,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:23:31,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:23:32,348 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2024-11-18 14:23:32,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:23:32,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 220 conjuncts are in the unsatisfiable core [2024-11-18 14:23:32,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:23:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2024-11-18 14:23:32,973 INFO L311 TraceCheckSpWp]: Computing backward predicates...