./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-programs/partial_mod_count_limited_gen.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:05:02,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:05:03,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:05:03,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:05:03,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:05:03,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:05:03,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:05:03,056 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:05:03,057 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:05:03,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:05:03,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:05:03,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:05:03,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:05:03,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:05:03,061 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:05:03,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:05:03,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:05:03,063 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:05:03,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:05:03,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:05:03,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:05:03,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:05:03,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:05:03,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:05:03,068 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:05:03,068 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:05:03,068 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:05:03,069 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:05:03,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:05:03,069 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:05:03,069 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:05:03,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:05:03,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:03,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:05:03,070 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:05:03,070 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:05:03,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:05:03,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:05:03,071 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:05:03,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:05:03,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:05:03,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:05:03,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d [2024-10-10 22:05:03,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:05:03,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:05:03,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:05:03,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:05:03,358 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:05:03,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2024-10-10 22:05:04,742 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:05:04,930 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:05:04,931 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2024-10-10 22:05:04,938 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b4189b63a/c4e1ebe79d834b5186f7b699d035b318/FLAGb4d7f67c4 [2024-10-10 22:05:04,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b4189b63a/c4e1ebe79d834b5186f7b699d035b318 [2024-10-10 22:05:04,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:05:04,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:05:04,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:04,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:05:04,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:05:04,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:04" (1/1) ... [2024-10-10 22:05:04,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a4c805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:04, skipping insertion in model container [2024-10-10 22:05:04,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:04" (1/1) ... [2024-10-10 22:05:04,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:05:05,152 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-programs/partial_mod_count_limited_gen.c[333,346] [2024-10-10 22:05:05,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:05,183 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:05:05,193 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-programs/partial_mod_count_limited_gen.c[333,346] [2024-10-10 22:05:05,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:05,217 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:05:05,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05 WrapperNode [2024-10-10 22:05:05,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:05,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:05,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:05:05,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:05:05,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,251 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-10 22:05:05,252 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:05,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:05:05,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:05:05,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:05:05,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,268 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,281 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-10 22:05:05,282 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,282 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,293 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:05:05,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:05:05,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:05:05,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:05:05,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (1/1) ... [2024-10-10 22:05:05,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:05,344 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 22:05:05,347 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 22:05:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:05:05,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-10 22:05:05,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-10 22:05:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:05:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:05:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:05:05,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:05:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:05:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:05:05,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:05:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:05:05,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:05:05,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:05:05,495 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:05:05,497 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:05:05,676 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-10 22:05:05,676 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:05:05,708 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:05:05,709 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-10 22:05:05,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:05 BoogieIcfgContainer [2024-10-10 22:05:05,709 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:05:05,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:05:05,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:05:05,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:05:05,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:05:04" (1/3) ... [2024-10-10 22:05:05,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7a99d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:05, skipping insertion in model container [2024-10-10 22:05:05,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:05" (2/3) ... [2024-10-10 22:05:05,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7a99d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:05, skipping insertion in model container [2024-10-10 22:05:05,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:05" (3/3) ... [2024-10-10 22:05:05,720 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_gen.c [2024-10-10 22:05:05,736 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:05:05,737 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:05:05,798 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:05:05,806 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;@4062758c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:05:05,806 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:05:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-10 22:05:05,818 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:05,819 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:05,820 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:05,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1196437446, now seen corresponding path program 1 times [2024-10-10 22:05:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39804198] [2024-10-10 22:05:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:05,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39804198] [2024-10-10 22:05:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39804198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:06,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:05:06,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:05:06,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513889525] [2024-10-10 22:05:06,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:06,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:05:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:05:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:05:06,062 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:06,084 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2024-10-10 22:05:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:05:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-10-10 22:05:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:06,092 INFO L225 Difference]: With dead ends: 44 [2024-10-10 22:05:06,092 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 22:05:06,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 22:05:06,100 INFO L432 NwaCegarLoop]: 25 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, 25 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 22:05:06,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 22:05:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-10 22:05:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-10-10 22:05:06,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 19 [2024-10-10 22:05:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:06,133 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-10-10 22:05:06,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-10-10 22:05:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-10 22:05:06,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:06,134 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:06,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:05:06,135 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:06,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 876433670, now seen corresponding path program 1 times [2024-10-10 22:05:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032720849] [2024-10-10 22:05:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:06,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:06,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032720849] [2024-10-10 22:05:06,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032720849] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:06,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:05:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:05:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204711657] [2024-10-10 22:05:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:06,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:05:06,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:05:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:05:06,412 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-10 22:05:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:06,504 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2024-10-10 22:05:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:05:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-10-10 22:05:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:06,506 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:05:06,506 INFO L226 Difference]: Without dead ends: 33 [2024-10-10 22:05:06,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 22:05:06,508 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:06,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:05:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-10 22:05:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2024-10-10 22:05:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-10 22:05:06,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2024-10-10 22:05:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:06,519 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-10 22:05:06,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-10 22:05:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-10 22:05:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-10 22:05:06,521 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:06,521 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:06,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:05:06,522 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:06,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash -635549255, now seen corresponding path program 1 times [2024-10-10 22:05:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943081384] [2024-10-10 22:05:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:06,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943081384] [2024-10-10 22:05:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943081384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81002560] [2024-10-10 22:05:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:06,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:06,822 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 22:05:06,824 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 22:05:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:06,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:05:06,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:07,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81002560] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:07,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 10 [2024-10-10 22:05:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775963939] [2024-10-10 22:05:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:07,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 22:05:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 22:05:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:05:07,136 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:10,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-10 22:05:12,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-10 22:05:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:12,398 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-10-10 22:05:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 22:05:12,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2024-10-10 22:05:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:12,400 INFO L225 Difference]: With dead ends: 67 [2024-10-10 22:05:12,400 INFO L226 Difference]: Without dead ends: 59 [2024-10-10 22:05:12,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:05:12,402 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:12,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 53 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-10-10 22:05:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-10 22:05:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2024-10-10 22:05:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-10-10 22:05:12,411 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 24 [2024-10-10 22:05:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:12,411 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-10-10 22:05:12,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-10-10 22:05:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-10 22:05:12,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:12,413 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:12,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:05:12,614 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 22:05:12,615 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:12,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1704010620, now seen corresponding path program 1 times [2024-10-10 22:05:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359417654] [2024-10-10 22:05:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:12,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:12,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 22:05:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359417654] [2024-10-10 22:05:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359417654] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:12,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:05:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-10 22:05:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119755000] [2024-10-10 22:05:12,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:12,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-10 22:05:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-10 22:05:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:12,875 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-10 22:05:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:12,943 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2024-10-10 22:05:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-10 22:05:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-10-10 22:05:12,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:12,945 INFO L225 Difference]: With dead ends: 69 [2024-10-10 22:05:12,945 INFO L226 Difference]: Without dead ends: 44 [2024-10-10 22:05:12,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-10 22:05:12,946 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:12,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-10 22:05:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-10-10 22:05:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-10-10 22:05:12,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 39 [2024-10-10 22:05:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:12,958 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-10-10 22:05:12,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-10 22:05:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-10-10 22:05:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-10 22:05:12,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:12,959 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:12,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-10 22:05:12,960 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:12,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1838024126, now seen corresponding path program 1 times [2024-10-10 22:05:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253613508] [2024-10-10 22:05:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:13,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:13,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:13,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253613508] [2024-10-10 22:05:13,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253613508] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:13,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889118099] [2024-10-10 22:05:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:13,233 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 22:05:13,234 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 22:05:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:13,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 22:05:13,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:13,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:13,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889118099] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:13,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:13,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2024-10-10 22:05:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315400538] [2024-10-10 22:05:13,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:13,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-10 22:05:13,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:13,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-10 22:05:13,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2024-10-10 22:05:13,609 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:13,893 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2024-10-10 22:05:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-10 22:05:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-10-10 22:05:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:13,895 INFO L225 Difference]: With dead ends: 139 [2024-10-10 22:05:13,896 INFO L226 Difference]: Without dead ends: 131 [2024-10-10 22:05:13,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:05:13,897 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 388 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:13,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 112 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:05:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-10 22:05:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 67. [2024-10-10 22:05:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2024-10-10 22:05:13,906 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 39 [2024-10-10 22:05:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:13,907 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2024-10-10 22:05:13,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2024-10-10 22:05:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-10 22:05:13,909 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:13,909 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:13,926 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 22:05:14,109 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 22:05:14,110 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:14,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash 514184482, now seen corresponding path program 2 times [2024-10-10 22:05:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:14,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453299056] [2024-10-10 22:05:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:14,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:14,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:14,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453299056] [2024-10-10 22:05:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453299056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:14,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607677239] [2024-10-10 22:05:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:05:14,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:14,656 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 22:05:14,660 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 22:05:14,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:05:14,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:14,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-10 22:05:14,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:15,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607677239] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:15,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 37 [2024-10-10 22:05:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599971042] [2024-10-10 22:05:15,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:15,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-10 22:05:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:15,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-10 22:05:15,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2024-10-10 22:05:15,500 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:16,516 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2024-10-10 22:05:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-10 22:05:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2024-10-10 22:05:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:16,520 INFO L225 Difference]: With dead ends: 283 [2024-10-10 22:05:16,524 INFO L226 Difference]: Without dead ends: 275 [2024-10-10 22:05:16,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:05:16,526 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 878 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:16,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 209 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:05:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-10-10 22:05:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 127. [2024-10-10 22:05:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.3658536585365855) internal successors, (168), 123 states have internal predecessors, (168), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-10 22:05:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 172 transitions. [2024-10-10 22:05:16,549 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 172 transitions. Word has length 69 [2024-10-10 22:05:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:16,549 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 172 transitions. [2024-10-10 22:05:16,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:05:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 172 transitions. [2024-10-10 22:05:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-10 22:05:16,551 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:16,551 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:16,558 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 22:05:16,755 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 22:05:16,756 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:16,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -316886302, now seen corresponding path program 3 times [2024-10-10 22:05:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:16,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511591669] [2024-10-10 22:05:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:18,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-10 22:05:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:18,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-10 22:05:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 22:05:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511591669] [2024-10-10 22:05:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511591669] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486094575] [2024-10-10 22:05:18,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:05:18,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:18,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:18,642 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 22:05:18,643 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