./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 01:53:57,823 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 01:53:57,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 01:53:57,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 01:53:57,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 01:53:57,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 01:53:57,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 01:53:57,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 01:53:57,941 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 01:53:57,942 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 01:53:57,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 01:53:57,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 01:53:57,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 01:53:57,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 01:53:57,945 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 01:53:57,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 01:53:57,945 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 01:53:57,945 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 01:53:57,946 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 01:53:57,946 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 01:53:57,946 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 01:53:57,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 01:53:57,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 01:53:57,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 01:53:57,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 01:53:57,953 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:53:57,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 01:53:57,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 01:53:57,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 01:53:57,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 01:53:57,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 01:53:57,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 01:53:57,960 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72ad066471387bf5403e859503e1fde5318d51a6c677887f8013c98efb036f7e [2024-10-11 01:53:58,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 01:53:58,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 01:53:58,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 01:53:58,247 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 01:53:58,247 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 01:53:58,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2024-10-11 01:53:59,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 01:53:59,820 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 01:53:59,820 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c [2024-10-11 01:53:59,828 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/69f14dc47/a7d23a35d62440f9bbdb6898b2420cb5/FLAGebcbce42d [2024-10-11 01:53:59,839 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/69f14dc47/a7d23a35d62440f9bbdb6898b2420cb5 [2024-10-11 01:53:59,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 01:53:59,843 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 01:53:59,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 01:53:59,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 01:53:59,851 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 01:53:59,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:53:59" (1/1) ... [2024-10-11 01:53:59,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcb71aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:53:59, skipping insertion in model container [2024-10-11 01:53:59,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:53:59" (1/1) ... [2024-10-11 01:53:59,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 01:54:00,001 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2024-10-11 01:54:00,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:54:00,016 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 01:54:00,025 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono4_1.c[311,324] [2024-10-11 01:54:00,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 01:54:00,047 INFO L204 MainTranslator]: Completed translation [2024-10-11 01:54:00,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00 WrapperNode [2024-10-11 01:54:00,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 01:54:00,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 01:54:00,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 01:54:00,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 01:54:00,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,070 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2024-10-11 01:54:00,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 01:54:00,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 01:54:00,071 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 01:54:00,071 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 01:54:00,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,086 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 01:54:00,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 01:54:00,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 01:54:00,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 01:54:00,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 01:54:00,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (1/1) ... [2024-10-11 01:54:00,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 01:54:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:00,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 01:54:00,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 01:54:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 01:54:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 01:54:00,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 01:54:00,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 01:54:00,199 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 01:54:00,201 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 01:54:00,299 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-11 01:54:00,299 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 01:54:00,332 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 01:54:00,332 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 01:54:00,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:54:00 BoogieIcfgContainer [2024-10-11 01:54:00,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 01:54:00,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 01:54:00,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 01:54:00,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 01:54:00,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:53:59" (1/3) ... [2024-10-11 01:54:00,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b95a161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:54:00, skipping insertion in model container [2024-10-11 01:54:00,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:54:00" (2/3) ... [2024-10-11 01:54:00,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b95a161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:54:00, skipping insertion in model container [2024-10-11 01:54:00,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:54:00" (3/3) ... [2024-10-11 01:54:00,351 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2024-10-11 01:54:00,377 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 01:54:00,381 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 01:54:00,438 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 01:54:00,446 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;@4efe897a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 01:54:00,446 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 01:54:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 01:54:00,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:00,459 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 01:54:00,460 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:00,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash 62462887, now seen corresponding path program 1 times [2024-10-11 01:54:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412402993] [2024-10-11 01:54:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:00,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:54:00,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412402993] [2024-10-11 01:54:00,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412402993] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:54:00,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:54:00,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:54:00,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40123334] [2024-10-11 01:54:00,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:54:00,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 01:54:00,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:00,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 01:54:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 01:54:00,634 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:00,647 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2024-10-11 01:54:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 01:54:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-11 01:54:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:00,662 INFO L225 Difference]: With dead ends: 15 [2024-10-11 01:54:00,662 INFO L226 Difference]: Without dead ends: 7 [2024-10-11 01:54:00,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 01:54:00,671 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:00,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:54:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-10-11 01:54:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-10-11 01:54:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-10-11 01:54:00,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-10-11 01:54:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:00,695 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-10-11 01:54:00,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-10-11 01:54:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 01:54:00,696 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:00,696 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 01:54:00,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 01:54:00,697 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:00,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 62164977, now seen corresponding path program 1 times [2024-10-11 01:54:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140620614] [2024-10-11 01:54:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:54:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:00,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140620614] [2024-10-11 01:54:00,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140620614] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 01:54:00,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 01:54:00,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 01:54:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444286585] [2024-10-11 01:54:00,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 01:54:00,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 01:54:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 01:54:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:54:00,753 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:00,770 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-10-11 01:54:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 01:54:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-11 01:54:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:00,772 INFO L225 Difference]: With dead ends: 15 [2024-10-11 01:54:00,773 INFO L226 Difference]: Without dead ends: 9 [2024-10-11 01:54:00,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 01:54:00,774 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:00,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:54:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-10-11 01:54:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-10-11 01:54:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2024-10-11 01:54:00,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2024-10-11 01:54:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:00,779 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2024-10-11 01:54:00,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2024-10-11 01:54:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 01:54:00,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:00,780 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 01:54:00,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 01:54:00,781 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:00,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:00,782 INFO L85 PathProgramCache]: Analyzing trace with hash -338656492, now seen corresponding path program 1 times [2024-10-11 01:54:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:00,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785959354] [2024-10-11 01:54:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:54:00,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:00,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785959354] [2024-10-11 01:54:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785959354] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826561472] [2024-10-11 01:54:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:00,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:00,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:00,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 01:54:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:00,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 01:54:00,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:54:00,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 01:54:00,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826561472] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:00,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:00,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 01:54:00,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74793595] [2024-10-11 01:54:00,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:00,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 01:54:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 01:54:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:54:00,976 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:01,003 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2024-10-11 01:54:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 01:54:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 01:54:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:01,004 INFO L225 Difference]: With dead ends: 20 [2024-10-11 01:54:01,004 INFO L226 Difference]: Without dead ends: 14 [2024-10-11 01:54:01,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 01:54:01,005 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:01,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:54:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-11 01:54:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-11 01:54:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-10-11 01:54:01,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2024-10-11 01:54:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:01,008 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-10-11 01:54:01,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-10-11 01:54:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 01:54:01,009 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:01,009 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 01:54:01,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 01:54:01,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:01,214 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:01,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:01,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1494242689, now seen corresponding path program 1 times [2024-10-11 01:54:01,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:01,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813131822] [2024-10-11 01:54:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:01,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:01,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813131822] [2024-10-11 01:54:01,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813131822] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:01,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402038758] [2024-10-11 01:54:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:01,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:01,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:01,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 01:54:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:01,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 01:54:01,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:01,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402038758] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:01,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 01:54:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312881068] [2024-10-11 01:54:01,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:01,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 01:54:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 01:54:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:54:01,393 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:01,421 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-10-11 01:54:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 01:54:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-11 01:54:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:01,421 INFO L225 Difference]: With dead ends: 31 [2024-10-11 01:54:01,422 INFO L226 Difference]: Without dead ends: 22 [2024-10-11 01:54:01,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 01:54:01,423 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:01,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:54:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-11 01:54:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-11 01:54:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-10-11 01:54:01,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2024-10-11 01:54:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:01,426 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-10-11 01:54:01,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-10-11 01:54:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 01:54:01,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:01,427 INFO L215 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1] [2024-10-11 01:54:01,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 01:54:01,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:01,632 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:01,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:01,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1567053427, now seen corresponding path program 2 times [2024-10-11 01:54:01,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:01,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833361661] [2024-10-11 01:54:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:01,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:01,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833361661] [2024-10-11 01:54:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833361661] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882756340] [2024-10-11 01:54:01,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:54:01,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:01,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:01,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:01,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 01:54:01,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:54:01,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:01,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 01:54:01,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:01,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882756340] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:02,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-11 01:54:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829762603] [2024-10-11 01:54:02,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:02,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 01:54:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 01:54:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 01:54:02,046 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:02,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:02,096 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-10-11 01:54:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 01:54:02,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-11 01:54:02,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:02,097 INFO L225 Difference]: With dead ends: 47 [2024-10-11 01:54:02,098 INFO L226 Difference]: Without dead ends: 38 [2024-10-11 01:54:02,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-11 01:54:02,100 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:02,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 01:54:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-11 01:54:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-11 01:54:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-10-11 01:54:02,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2024-10-11 01:54:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:02,108 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-10-11 01:54:02,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-10-11 01:54:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 01:54:02,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:02,109 INFO L215 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1] [2024-10-11 01:54:02,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 01:54:02,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:02,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:02,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:02,311 INFO L85 PathProgramCache]: Analyzing trace with hash 169405861, now seen corresponding path program 3 times [2024-10-11 01:54:02,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:02,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757891717] [2024-10-11 01:54:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 01:54:02,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:02,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757891717] [2024-10-11 01:54:02,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757891717] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:02,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122407327] [2024-10-11 01:54:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:54:02,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:02,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:02,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 01:54:02,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 01:54:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:02,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 01:54:02,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-11 01:54:02,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-10-11 01:54:02,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122407327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:02,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:02,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 26 [2024-10-11 01:54:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179725975] [2024-10-11 01:54:02,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:02,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 01:54:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 01:54:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2024-10-11 01:54:02,841 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:03,126 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2024-10-11 01:54:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 01:54:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-11 01:54:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:03,128 INFO L225 Difference]: With dead ends: 80 [2024-10-11 01:54:03,128 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 01:54:03,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=547, Invalid=1433, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 01:54:03,129 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:03,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:54:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 01:54:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2024-10-11 01:54:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-10-11 01:54:03,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2024-10-11 01:54:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:03,137 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-10-11 01:54:03,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-10-11 01:54:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-11 01:54:03,138 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:03,138 INFO L215 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1] [2024-10-11 01:54:03,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 01:54:03,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 01:54:03,343 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:03,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash -569714980, now seen corresponding path program 4 times [2024-10-11 01:54:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:03,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784997287] [2024-10-11 01:54:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:03,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:03,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784997287] [2024-10-11 01:54:03,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784997287] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895199454] [2024-10-11 01:54:03,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 01:54:03,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:03,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:03,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:03,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 01:54:03,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 01:54:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:03,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 01:54:03,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:03,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895199454] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:04,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:04,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2024-10-11 01:54:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010264540] [2024-10-11 01:54:04,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:04,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-11 01:54:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-11 01:54:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 01:54:04,072 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:04,152 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2024-10-11 01:54:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 01:54:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-11 01:54:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:04,157 INFO L225 Difference]: With dead ends: 97 [2024-10-11 01:54:04,157 INFO L226 Difference]: Without dead ends: 82 [2024-10-11 01:54:04,157 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 01:54:04,158 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:04,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:54:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-11 01:54:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-10-11 01:54:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2024-10-11 01:54:04,164 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 47 [2024-10-11 01:54:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:04,164 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2024-10-11 01:54:04,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2024-10-11 01:54:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-11 01:54:04,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:04,170 INFO L215 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1] [2024-10-11 01:54:04,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 01:54:04,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:04,371 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:04,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2107285905, now seen corresponding path program 5 times [2024-10-11 01:54:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355495579] [2024-10-11 01:54:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:05,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:05,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355495579] [2024-10-11 01:54:05,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355495579] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:05,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298423414] [2024-10-11 01:54:05,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 01:54:05,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:05,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:05,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:05,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 01:54:05,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2024-10-11 01:54:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:05,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 01:54:05,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:05,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298423414] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:06,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:06,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2024-10-11 01:54:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814446133] [2024-10-11 01:54:06,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:06,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-11 01:54:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-11 01:54:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-11 01:54:06,533 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:06,685 INFO L93 Difference]: Finished difference Result 165 states and 210 transitions. [2024-10-11 01:54:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-11 01:54:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-10-11 01:54:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:06,686 INFO L225 Difference]: With dead ends: 165 [2024-10-11 01:54:06,687 INFO L226 Difference]: Without dead ends: 150 [2024-10-11 01:54:06,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-11 01:54:06,688 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:06,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:54:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-11 01:54:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-11 01:54:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0469798657718121) internal successors, (156), 149 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2024-10-11 01:54:06,705 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 81 [2024-10-11 01:54:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:06,706 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2024-10-11 01:54:06,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2024-10-11 01:54:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-10-11 01:54:06,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:06,708 INFO L215 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1] [2024-10-11 01:54:06,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 01:54:06,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 01:54:06,909 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:06,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1750028459, now seen corresponding path program 6 times [2024-10-11 01:54:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270220366] [2024-10-11 01:54:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:06,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 01:54:09,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270220366] [2024-10-11 01:54:09,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270220366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110168742] [2024-10-11 01:54:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 01:54:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:09,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:09,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 01:54:09,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-10-11 01:54:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:09,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 01:54:09,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-10-11 01:54:09,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-10-11 01:54:10,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110168742] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:10,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 10, 10] total 86 [2024-10-11 01:54:10,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999892458] [2024-10-11 01:54:10,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:10,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-10-11 01:54:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-10-11 01:54:10,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2483, Invalid=4999, Unknown=0, NotChecked=0, Total=7482 [2024-10-11 01:54:10,007 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:12,226 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2024-10-11 01:54:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-10-11 01:54:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-10-11 01:54:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:12,228 INFO L225 Difference]: With dead ends: 222 [2024-10-11 01:54:12,228 INFO L226 Difference]: Without dead ends: 198 [2024-10-11 01:54:12,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=8129, Invalid=17631, Unknown=0, NotChecked=0, Total=25760 [2024-10-11 01:54:12,256 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:12,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 61 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 01:54:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-11 01:54:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 168. [2024-10-11 01:54:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.089820359281437) internal successors, (182), 167 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 182 transitions. [2024-10-11 01:54:12,271 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 182 transitions. Word has length 149 [2024-10-11 01:54:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:12,272 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 182 transitions. [2024-10-11 01:54:12,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 182 transitions. [2024-10-11 01:54:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-10-11 01:54:12,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:12,275 INFO L215 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1] [2024-10-11 01:54:12,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 01:54:12,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:12,478 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:12,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2084740256, now seen corresponding path program 7 times [2024-10-11 01:54:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978448010] [2024-10-11 01:54:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:14,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:14,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978448010] [2024-10-11 01:54:14,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978448010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:14,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184078264] [2024-10-11 01:54:14,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 01:54:14,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:14,597 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:14,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 01:54:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:14,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-11 01:54:14,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:14,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:19,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184078264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:19,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:19,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 138 [2024-10-11 01:54:19,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838958794] [2024-10-11 01:54:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:19,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-10-11 01:54:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-10-11 01:54:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-10-11 01:54:19,477 INFO L87 Difference]: Start difference. First operand 168 states and 182 transitions. Second operand has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:19,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:19,834 INFO L93 Difference]: Finished difference Result 337 states and 433 transitions. [2024-10-11 01:54:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-10-11 01:54:19,834 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2024-10-11 01:54:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:19,837 INFO L225 Difference]: With dead ends: 337 [2024-10-11 01:54:19,837 INFO L226 Difference]: Without dead ends: 306 [2024-10-11 01:54:19,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-10-11 01:54:19,839 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:19,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 01:54:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-10-11 01:54:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2024-10-11 01:54:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0491803278688525) internal successors, (320), 305 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 320 transitions. [2024-10-11 01:54:19,862 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 320 transitions. Word has length 167 [2024-10-11 01:54:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:19,863 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 320 transitions. [2024-10-11 01:54:19,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.035971223021583) internal successors, (283), 138 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 320 transitions. [2024-10-11 01:54:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2024-10-11 01:54:19,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:19,867 INFO L215 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1] [2024-10-11 01:54:19,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 01:54:20,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 01:54:20,071 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:20,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1227317711, now seen corresponding path program 8 times [2024-10-11 01:54:20,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:20,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079066299] [2024-10-11 01:54:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:54:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:54:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079066299] [2024-10-11 01:54:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079066299] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:54:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094291524] [2024-10-11 01:54:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 01:54:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:54:27,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:54:27,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 01:54:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 01:54:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:54:27,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-10-11 01:54:27,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:54:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:28,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:54:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:54:44,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094291524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:54:44,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:54:44,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138, 138] total 276 [2024-10-11 01:54:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859127656] [2024-10-11 01:54:44,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:54:44,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-10-11 01:54:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:54:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-10-11 01:54:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-10-11 01:54:44,938 INFO L87 Difference]: Start difference. First operand 306 states and 320 transitions. Second operand has 277 states, 277 states have (on average 2.0180505415162453) internal successors, (559), 276 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 01:54:46,095 INFO L93 Difference]: Finished difference Result 613 states and 778 transitions. [2024-10-11 01:54:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-10-11 01:54:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0180505415162453) internal successors, (559), 276 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2024-10-11 01:54:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 01:54:46,098 INFO L225 Difference]: With dead ends: 613 [2024-10-11 01:54:46,098 INFO L226 Difference]: Without dead ends: 582 [2024-10-11 01:54:46,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-10-11 01:54:46,101 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 01:54:46,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 01:54:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2024-10-11 01:54:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2024-10-11 01:54:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.0258175559380378) internal successors, (596), 581 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 596 transitions. [2024-10-11 01:54:46,116 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 596 transitions. Word has length 305 [2024-10-11 01:54:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 01:54:46,116 INFO L471 AbstractCegarLoop]: Abstraction has 582 states and 596 transitions. [2024-10-11 01:54:46,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0180505415162453) internal successors, (559), 276 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 01:54:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 596 transitions. [2024-10-11 01:54:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2024-10-11 01:54:46,122 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 01:54:46,122 INFO L215 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1] [2024-10-11 01:54:46,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 01:54:46,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:54:46,323 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 01:54:46,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 01:54:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 504512493, now seen corresponding path program 9 times [2024-10-11 01:54:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 01:54:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003221907] [2024-10-11 01:54:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 01:54:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 01:54:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 01:55:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-10-11 01:55:21,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 01:55:21,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003221907] [2024-10-11 01:55:21,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003221907] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 01:55:21,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477317197] [2024-10-11 01:55:21,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 01:55:21,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 01:55:21,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 01:55:21,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 01:55:21,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 01:55:21,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-10-11 01:55:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 01:55:21,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 01:55:21,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 01:55:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2024-10-11 01:55:24,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 01:55:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2024-10-11 01:55:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477317197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 01:55:26,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 01:55:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [276, 18, 18] total 310 [2024-10-11 01:55:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693014654] [2024-10-11 01:55:26,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 01:55:26,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2024-10-11 01:55:26,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 01:55:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2024-10-11 01:55:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38747, Invalid=57663, Unknown=0, NotChecked=0, Total=96410 [2024-10-11 01:55:26,379 INFO L87 Difference]: Start difference. First operand 582 states and 596 transitions. Second operand has 311 states, 311 states have (on average 2.0032154340836015) internal successors, (623), 310 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)