./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i --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/array-examples/standard_strcpy_ground-1.i -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 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:53:39,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:53:39,936 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:53:39,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:53:39,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:53:39,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:53:39,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:53:39,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:53:39,980 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:53:39,981 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:53:39,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:53:39,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:53:39,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:53:39,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:53:39,985 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:53:39,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:53:39,986 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:53:39,986 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:53:39,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:53:39,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:53:39,987 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:53:39,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:53:39,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:53:39,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:53:39,992 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:53:39,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:53:39,992 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:53:39,993 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:53:39,993 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:53:39,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:53:39,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:53:39,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:53:39,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:53:39,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:53:39,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:53:39,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:53:39,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:53:39,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:53:39,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:53:39,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:53:39,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:53:39,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:53:39,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a [2024-10-10 21:53:40,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:53:40,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:53:40,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:53:40,273 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:53:40,274 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:53:40,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2024-10-10 21:53:41,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:53:41,891 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:53:41,892 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2024-10-10 21:53:41,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3830d6d43/246a84a7bc424d75beb303b1666d8c0c/FLAGac544d883 [2024-10-10 21:53:41,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/3830d6d43/246a84a7bc424d75beb303b1666d8c0c [2024-10-10 21:53:41,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:53:41,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:53:41,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:53:41,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:53:41,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:53:41,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:53:41" (1/1) ... [2024-10-10 21:53:41,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee76149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:41, skipping insertion in model container [2024-10-10 21:53:41,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:53:41" (1/1) ... [2024-10-10 21:53:41,940 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:53:42,104 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2024-10-10 21:53:42,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:53:42,122 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:53:42,133 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2024-10-10 21:53:42,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:53:42,154 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:53:42,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42 WrapperNode [2024-10-10 21:53:42,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:53:42,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:53:42,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:53:42,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:53:42,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,187 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-10 21:53:42,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:53:42,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:53:42,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:53:42,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:53:42,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,232 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-10 21:53:42,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,248 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:53:42,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:53:42,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:53:42,260 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:53:42,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (1/1) ... [2024-10-10 21:53:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:53:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:42,308 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) [2024-10-10 21:53:42,310 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 [2024-10-10 21:53:42,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 21:53:42,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:53:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:53:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:53:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:53:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 21:53:42,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:53:42,421 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:53:42,423 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:53:42,554 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-10 21:53:42,554 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:53:42,592 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:53:42,593 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:53:42,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:53:42 BoogieIcfgContainer [2024-10-10 21:53:42,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:53:42,597 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:53:42,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:53:42,602 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:53:42,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:53:41" (1/3) ... [2024-10-10 21:53:42,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7770c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:53:42, skipping insertion in model container [2024-10-10 21:53:42,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:42" (2/3) ... [2024-10-10 21:53:42,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7770c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:53:42, skipping insertion in model container [2024-10-10 21:53:42,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:53:42" (3/3) ... [2024-10-10 21:53:42,607 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2024-10-10 21:53:42,623 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:53:42,623 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:53:42,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:53:42,694 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;@779f57a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:53:42,694 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:53:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 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) [2024-10-10 21:53:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-10 21:53:42,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:42,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:42,705 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:42,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2108282814, now seen corresponding path program 1 times [2024-10-10 21:53:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226262208] [2024-10-10 21:53:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226262208] [2024-10-10 21:53:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226262208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:53:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:53:42,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 21:53:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568948148] [2024-10-10 21:53:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:53:42,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 21:53:42,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 21:53:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 21:53:42,928 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-10 21:53:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:42,954 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2024-10-10 21:53:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 21:53:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 [2024-10-10 21:53:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:42,965 INFO L225 Difference]: With dead ends: 24 [2024-10-10 21:53:42,966 INFO L226 Difference]: Without dead ends: 11 [2024-10-10 21:53:42,968 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 [2024-10-10 21:53:42,971 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:42,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-10 21:53:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-10 21:53:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2024-10-10 21:53:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-10-10 21:53:42,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2024-10-10 21:53:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:42,996 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-10-10 21:53:42,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-10 21:53:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-10-10 21:53:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-10 21:53:42,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:42,998 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:42,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 21:53:42,999 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:42,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash -174235625, now seen corresponding path program 1 times [2024-10-10 21:53:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681376660] [2024-10-10 21:53:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:43,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:43,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681376660] [2024-10-10 21:53:43,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681376660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:53:43,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:53:43,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 21:53:43,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532249953] [2024-10-10 21:53:43,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:53:43,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:53:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:53:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:53:43,128 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-10 21:53:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:43,152 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2024-10-10 21:53:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:53:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-10 21:53:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:43,154 INFO L225 Difference]: With dead ends: 21 [2024-10-10 21:53:43,154 INFO L226 Difference]: Without dead ends: 12 [2024-10-10 21:53:43,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:53:43,156 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:43,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-10-10 21:53:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-10-10 21:53:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2024-10-10 21:53:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-10-10 21:53:43,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2024-10-10 21:53:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:43,162 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-10-10 21:53:43,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-10 21:53:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-10-10 21:53:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 21:53:43,164 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:43,164 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:43,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 21:53:43,165 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:43,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:43,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1771770842, now seen corresponding path program 1 times [2024-10-10 21:53:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650183605] [2024-10-10 21:53:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:43,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650183605] [2024-10-10 21:53:43,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650183605] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994227653] [2024-10-10 21:53:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:43,277 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) [2024-10-10 21:53:43,279 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 [2024-10-10 21:53:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:43,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:53:43,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:43,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:43,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994227653] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:43,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:43,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-10 21:53:43,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148697268] [2024-10-10 21:53:43,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:43,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:53:43,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:43,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:53:43,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:53:43,422 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2024-10-10 21:53:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:43,447 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2024-10-10 21:53:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 21:53:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 10 [2024-10-10 21:53:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:43,449 INFO L225 Difference]: With dead ends: 24 [2024-10-10 21:53:43,449 INFO L226 Difference]: Without dead ends: 15 [2024-10-10 21:53:43,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:53:43,450 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:43,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-10 21:53:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-10 21:53:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-10-10 21:53:43,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2024-10-10 21:53:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:43,454 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-10-10 21:53:43,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2024-10-10 21:53:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-10-10 21:53:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-10 21:53:43,455 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:43,455 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:43,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-10 21:53:43,657 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 [2024-10-10 21:53:43,658 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:43,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1322816553, now seen corresponding path program 2 times [2024-10-10 21:53:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614950976] [2024-10-10 21:53:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 21:53:43,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614950976] [2024-10-10 21:53:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614950976] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:53:43,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:53:43,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 21:53:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950488762] [2024-10-10 21:53:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:53:43,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 21:53:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 21:53:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:53:43,829 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2024-10-10 21:53:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:43,851 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-10 21:53:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 21:53:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) Word has length 13 [2024-10-10 21:53:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:43,852 INFO L225 Difference]: With dead ends: 25 [2024-10-10 21:53:43,852 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 21:53:43,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:53:43,856 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:43,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 21:53:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-10 21:53:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-10 21:53:43,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2024-10-10 21:53:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:43,864 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-10 21:53:43,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2024-10-10 21:53:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-10 21:53:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-10 21:53:43,865 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:43,865 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:43,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-10 21:53:43,865 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:43,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash 766348371, now seen corresponding path program 1 times [2024-10-10 21:53:43,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786004975] [2024-10-10 21:53:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:44,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786004975] [2024-10-10 21:53:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786004975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654769475] [2024-10-10 21:53:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:44,033 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) [2024-10-10 21:53:44,035 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 [2024-10-10 21:53:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:44,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:53:44,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:44,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654769475] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:44,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:44,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-10 21:53:44,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38709320] [2024-10-10 21:53:44,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:44,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-10 21:53:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-10 21:53:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 21:53:44,227 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:44,251 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-10-10 21:53:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 21:53:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-10 21:53:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:44,252 INFO L225 Difference]: With dead ends: 36 [2024-10-10 21:53:44,252 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 21:53:44,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 21:53:44,253 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:44,254 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 21:53:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 21:53:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-10 21:53:44,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2024-10-10 21:53:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:44,258 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-10 21:53:44,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-10 21:53:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 21:53:44,260 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:44,260 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:44,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 21:53:44,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:44,465 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:44,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1360569677, now seen corresponding path program 2 times [2024-10-10 21:53:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566035975] [2024-10-10 21:53:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566035975] [2024-10-10 21:53:44,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566035975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:44,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519082904] [2024-10-10 21:53:44,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:53:44,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:44,743 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) [2024-10-10 21:53:44,745 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 [2024-10-10 21:53:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:53:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:44,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-10 21:53:44,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:44,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519082904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:45,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-10 21:53:45,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123597635] [2024-10-10 21:53:45,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:45,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-10 21:53:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-10 21:53:45,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:53:45,156 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2024-10-10 21:53:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:45,212 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2024-10-10 21:53:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-10 21:53:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-10 21:53:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:45,213 INFO L225 Difference]: With dead ends: 48 [2024-10-10 21:53:45,213 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 21:53:45,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:53:45,215 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 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 [2024-10-10 21:53:45,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 21:53:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-10 21:53:45,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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) [2024-10-10 21:53:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-10 21:53:45,222 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2024-10-10 21:53:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:45,222 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-10 21:53:45,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2024-10-10 21:53:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-10 21:53:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-10 21:53:45,223 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:45,224 INFO L215 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:45,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 21:53:45,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:45,428 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:45,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 259792755, now seen corresponding path program 3 times [2024-10-10 21:53:45,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:45,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464989717] [2024-10-10 21:53:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:45,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:46,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464989717] [2024-10-10 21:53:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464989717] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709405970] [2024-10-10 21:53:46,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:53:46,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:46,077 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) [2024-10-10 21:53:46,078 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 [2024-10-10 21:53:46,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 21:53:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:46,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-10 21:53:46,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:46,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-10 21:53:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-10 21:53:46,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:46,619 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-10 21:53:46,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-10 21:53:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-10 21:53:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709405970] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:46,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:46,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5] total 31 [2024-10-10 21:53:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790098442] [2024-10-10 21:53:46,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:46,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 21:53:46,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 21:53:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2024-10-10 21:53:46,696 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2024-10-10 21:53:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:47,324 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2024-10-10 21:53:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 21:53:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 34 [2024-10-10 21:53:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:47,326 INFO L225 Difference]: With dead ends: 52 [2024-10-10 21:53:47,326 INFO L226 Difference]: Without dead ends: 40 [2024-10-10 21:53:47,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=947, Invalid=2133, Unknown=0, NotChecked=0, Total=3080 [2024-10-10 21:53:47,328 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:47,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 51 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:53:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-10 21:53:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-10-10 21:53:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-10 21:53:47,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2024-10-10 21:53:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:47,339 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-10 21:53:47,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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) [2024-10-10 21:53:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-10 21:53:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-10 21:53:47,340 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:47,340 INFO L215 NwaCegarLoop]: trace histogram [23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:47,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 21:53:47,541 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,SelfDestructingSolverStorable6 [2024-10-10 21:53:47,541 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:47,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1518968253, now seen corresponding path program 1 times [2024-10-10 21:53:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750487110] [2024-10-10 21:53:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:48,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750487110] [2024-10-10 21:53:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750487110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993163280] [2024-10-10 21:53:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:48,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:48,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:48,163 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) [2024-10-10 21:53:48,165 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 [2024-10-10 21:53:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:48,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 21:53:48,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:48,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993163280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-10-10 21:53:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791115228] [2024-10-10 21:53:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:49,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-10 21:53:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-10 21:53:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 21:53:49,065 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:49,127 INFO L93 Difference]: Finished difference Result 78 states and 110 transitions. [2024-10-10 21:53:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-10 21:53:49,128 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-10 21:53:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:49,129 INFO L225 Difference]: With dead ends: 78 [2024-10-10 21:53:49,130 INFO L226 Difference]: Without dead ends: 64 [2024-10-10 21:53:49,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 21:53:49,132 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:49,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-10 21:53:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-10 21:53:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-10-10 21:53:49,144 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 38 [2024-10-10 21:53:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:49,147 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-10-10 21:53:49,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:49,147 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-10-10 21:53:49,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-10 21:53:49,148 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:49,149 INFO L215 NwaCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:49,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 21:53:49,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:49,350 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:49,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:49,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1604098418, now seen corresponding path program 2 times [2024-10-10 21:53:49,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:49,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221903639] [2024-10-10 21:53:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221903639] [2024-10-10 21:53:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221903639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450777214] [2024-10-10 21:53:51,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:53:51,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:51,164 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) [2024-10-10 21:53:51,166 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 [2024-10-10 21:53:51,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:53:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:51,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-10 21:53:51,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:51,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:53:54,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450777214] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:54,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:54,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-10-10 21:53:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724631388] [2024-10-10 21:53:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:54,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-10-10 21:53:54,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-10-10 21:53:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-10 21:53:54,180 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 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) [2024-10-10 21:53:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:54,322 INFO L93 Difference]: Finished difference Result 128 states and 185 transitions. [2024-10-10 21:53:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-10 21:53:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 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 63 [2024-10-10 21:53:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:54,324 INFO L225 Difference]: With dead ends: 128 [2024-10-10 21:53:54,324 INFO L226 Difference]: Without dead ends: 114 [2024-10-10 21:53:54,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-10 21:53:54,329 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:54,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:53:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-10 21:53:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-10-10 21:53:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 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) [2024-10-10 21:53:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2024-10-10 21:53:54,348 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 63 [2024-10-10 21:53:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:54,349 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2024-10-10 21:53:54,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 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) [2024-10-10 21:53:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2024-10-10 21:53:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-10 21:53:54,354 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:54,354 INFO L215 NwaCegarLoop]: trace histogram [98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:54,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 21:53:54,554 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,SelfDestructingSolverStorable8 [2024-10-10 21:53:54,555 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:54,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -848130706, now seen corresponding path program 3 times [2024-10-10 21:53:54,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:54,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354311612] [2024-10-10 21:53:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:54,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:54:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-10 21:54:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:54:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354311612] [2024-10-10 21:54:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354311612] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:54:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885863218] [2024-10-10 21:54:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:54:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:54:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:54:00,269 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) [2024-10-10 21:54:00,270 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 [2024-10-10 21:54:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 21:54:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:54:00,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-10 21:54:00,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:54:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-10-10 21:54:00,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:54:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-10-10 21:54:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885863218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:54:01,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:54:01,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 5, 5] total 106 [2024-10-10 21:54:01,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838558939] [2024-10-10 21:54:01,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:54:01,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-10-10 21:54:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:54:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-10-10 21:54:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2024-10-10 21:54:01,015 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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) [2024-10-10 21:54:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:54:05,077 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2024-10-10 21:54:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-10-10 21:54:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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 113 [2024-10-10 21:54:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:54:05,079 INFO L225 Difference]: With dead ends: 137 [2024-10-10 21:54:05,079 INFO L226 Difference]: Without dead ends: 118 [2024-10-10 21:54:05,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5746 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2024-10-10 21:54:05,085 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:54:05,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:54:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-10 21:54:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-10-10 21:54:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 117 states have internal predecessors, (123), 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) [2024-10-10 21:54:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2024-10-10 21:54:05,097 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 113 [2024-10-10 21:54:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:54:05,097 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2024-10-10 21:54:05,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 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) [2024-10-10 21:54:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2024-10-10 21:54:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-10-10 21:54:05,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:54:05,099 INFO L215 NwaCegarLoop]: trace histogram [99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:54:05,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 21:54:05,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:54:05,300 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:54:05,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:54:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1840835269, now seen corresponding path program 4 times [2024-10-10 21:54:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:54:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354497614] [2024-10-10 21:54:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:54:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:54:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:54:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:54:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:54:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354497614] [2024-10-10 21:54:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354497614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:54:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12768855] [2024-10-10 21:54:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:54:10,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:54:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:54:10,844 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) [2024-10-10 21:54:10,845 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 [2024-10-10 21:54:11,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:54:11,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:54:11,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-10-10 21:54:11,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:54:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:54:11,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:54:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:54:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12768855] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:54:20,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:54:20,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2024-10-10 21:54:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559615023] [2024-10-10 21:54:20,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:54:20,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-10-10 21:54:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:54:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-10-10 21:54:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2024-10-10 21:54:20,862 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 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) [2024-10-10 21:54:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:54:21,176 INFO L93 Difference]: Finished difference Result 236 states and 346 transitions. [2024-10-10 21:54:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-10-10 21:54:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 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 117 [2024-10-10 21:54:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:54:21,178 INFO L225 Difference]: With dead ends: 236 [2024-10-10 21:54:21,179 INFO L226 Difference]: Without dead ends: 219 [2024-10-10 21:54:21,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2024-10-10 21:54:21,181 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:54:21,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:54:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-10-10 21:54:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2024-10-10 21:54:21,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0275229357798166) internal successors, (224), 218 states have internal predecessors, (224), 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) [2024-10-10 21:54:21,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 224 transitions. [2024-10-10 21:54:21,221 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 224 transitions. Word has length 117 [2024-10-10 21:54:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:54:21,221 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 224 transitions. [2024-10-10 21:54:21,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 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) [2024-10-10 21:54:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 224 transitions. [2024-10-10 21:54:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-10-10 21:54:21,225 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:54:21,225 INFO L215 NwaCegarLoop]: trace histogram [200, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:54:21,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-10 21:54:21,425 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,SelfDestructingSolverStorable10 [2024-10-10 21:54:21,426 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:54:21,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:54:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 624148746, now seen corresponding path program 5 times [2024-10-10 21:54:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:54:21,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765334816] [2024-10-10 21:54:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:54:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:54:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:54:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20111 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:54:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:54:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765334816] [2024-10-10 21:54:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765334816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:54:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389125912] [2024-10-10 21:54:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:54:40,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:54:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:54:40,863 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) [2024-10-10 21:54:40,865 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