./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-crafted/bor2.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-crafted/bor2.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 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:05:53,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:05:53,921 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:05:53,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:05:53,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:05:53,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:05:53,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:05:53,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:05:53,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:05:53,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:05:53,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:05:53,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:05:53,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:05:53,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:05:53,970 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:05:53,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:05:53,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:05:53,971 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:05:53,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:05:53,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:05:53,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:05:53,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:05:53,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:05:53,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:05:53,973 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:05:53,973 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:05:53,973 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:05:53,974 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:05:53,974 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:05:53,974 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:05:53,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:05:53,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:05:53,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:53,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:05:53,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:05:53,976 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:05:53,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:05:53,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:05:53,977 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:05:53,977 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:05:53,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:05:53,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:05:53,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 [2024-10-10 22:05:54,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:05:54,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:05:54,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:05:54,283 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:05:54,283 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:05:54,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i [2024-10-10 22:05:55,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:05:55,996 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:05:55,996 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i [2024-10-10 22:05:56,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c260b0bbb/bdcec158c16b4037a9dd463d39401451/FLAG78857cd0d [2024-10-10 22:05:56,022 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c260b0bbb/bdcec158c16b4037a9dd463d39401451 [2024-10-10 22:05:56,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:05:56,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:05:56,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:56,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:05:56,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:05:56,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555c46a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56, skipping insertion in model container [2024-10-10 22:05:56,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,063 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:05:56,280 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-crafted/bor2.i[1291,1304] [2024-10-10 22:05:56,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:56,298 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:05:56,316 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-crafted/bor2.i[1291,1304] [2024-10-10 22:05:56,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:05:56,333 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:05:56,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56 WrapperNode [2024-10-10 22:05:56,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:05:56,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:56,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:05:56,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:05:56,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,368 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2024-10-10 22:05:56,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:05:56,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:05:56,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:05:56,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:05:56,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,382 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,397 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-10 22:05:56,397 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:05:56,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:05:56,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:05:56,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:05:56,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (1/1) ... [2024-10-10 22:05:56,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:05:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:56,492 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 22:05:56,495 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 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2024-10-10 22:05:56,531 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2024-10-10 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:05:56,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:05:56,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:05:56,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:05:56,611 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:05:56,612 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:05:56,756 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-10-10 22:05:56,756 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:05:56,794 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:05:56,795 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:05:56,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:56 BoogieIcfgContainer [2024-10-10 22:05:56,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:05:56,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:05:56,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:05:56,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:05:56,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:05:56" (1/3) ... [2024-10-10 22:05:56,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c9df57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:56, skipping insertion in model container [2024-10-10 22:05:56,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:05:56" (2/3) ... [2024-10-10 22:05:56,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c9df57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:05:56, skipping insertion in model container [2024-10-10 22:05:56,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:05:56" (3/3) ... [2024-10-10 22:05:56,807 INFO L112 eAbstractionObserver]: Analyzing ICFG bor2.i [2024-10-10 22:05:56,820 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:05:56,820 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:05:56,868 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:05:56,874 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;@65d2d2df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:05:56,874 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:05:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:05:56,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:56,884 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:56,884 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:56,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1288412435, now seen corresponding path program 1 times [2024-10-10 22:05:56,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:56,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481914713] [2024-10-10 22:05:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 22:05:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,209 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 22:05:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 22:05:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:57,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481914713] [2024-10-10 22:05:57,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481914713] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156643996] [2024-10-10 22:05:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:57,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:57,259 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 22:05:57,260 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 22:05:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:57,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 22:05:57,399 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156643996] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:57,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-10 22:05:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931041981] [2024-10-10 22:05:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:57,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:57,435 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:57,479 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2024-10-10 22:05:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:57,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 22:05:57,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:57,490 INFO L225 Difference]: With dead ends: 47 [2024-10-10 22:05:57,490 INFO L226 Difference]: Without dead ends: 23 [2024-10-10 22:05:57,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:57,498 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 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 22:05:57,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-10 22:05:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-10 22:05:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2024-10-10 22:05:57,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 25 [2024-10-10 22:05:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:57,534 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2024-10-10 22:05:57,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 22:05:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2024-10-10 22:05:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 22:05:57,536 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:57,536 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:57,553 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 22:05:57,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-10 22:05:57,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:57,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 794330975, now seen corresponding path program 1 times [2024-10-10 22:05:57,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:57,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155707294] [2024-10-10 22:05:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 22:05:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 22:05:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 22:05:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155707294] [2024-10-10 22:05:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155707294] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60502446] [2024-10-10 22:05:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:57,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:57,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:57,927 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 22:05:57,928 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 22:05:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:58,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 22:05:58,023 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:58,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60502446] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:58,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:58,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 22:05:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008532534] [2024-10-10 22:05:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:58,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:58,029 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:58,062 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-10-10 22:05:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 22:05:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:58,065 INFO L225 Difference]: With dead ends: 46 [2024-10-10 22:05:58,066 INFO L226 Difference]: Without dead ends: 28 [2024-10-10 22:05:58,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 22:05:58,068 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 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 22:05:58,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-10 22:05:58,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-10 22:05:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-10 22:05:58,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 26 [2024-10-10 22:05:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:58,099 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-10 22:05:58,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-10 22:05:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-10 22:05:58,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:58,103 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:58,121 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 22:05:58,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,308 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:58,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -131171604, now seen corresponding path program 1 times [2024-10-10 22:05:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:58,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750072819] [2024-10-10 22:05:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:58,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,407 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 22:05:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:05:58,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:58,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750072819] [2024-10-10 22:05:58,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750072819] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:58,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537752700] [2024-10-10 22:05:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:58,469 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 22:05:58,471 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 22:05:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 22:05:58,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-10 22:05:58,574 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 22:05:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537752700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:05:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 22:05:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-10 22:05:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323939055] [2024-10-10 22:05:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:05:58,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:05:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:05:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:05:58,579 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:58,603 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-10 22:05:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:05:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-10 22:05:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:58,607 INFO L225 Difference]: With dead ends: 40 [2024-10-10 22:05:58,607 INFO L226 Difference]: Without dead ends: 25 [2024-10-10 22:05:58,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:05:58,610 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:58,611 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-10 22:05:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-10 22:05:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-10 22:05:58,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 35 [2024-10-10 22:05:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:58,621 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-10 22:05:58,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 22:05:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-10 22:05:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-10 22:05:58,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:58,622 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:05:58,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,824 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:58,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1415382448, now seen corresponding path program 1 times [2024-10-10 22:05:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:58,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75256286] [2024-10-10 22:05:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 22:05:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:05:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:05:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-10 22:05:58,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:58,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75256286] [2024-10-10 22:05:58,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75256286] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:58,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814829031] [2024-10-10 22:05:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:58,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:58,954 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 22:05:58,955 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 22:05:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 22:05:59,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:05:59,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-10 22:05:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814829031] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:59,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2024-10-10 22:05:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185931359] [2024-10-10 22:05:59,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:59,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-10 22:05:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:59,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-10 22:05:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:05:59,129 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:05:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:59,174 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2024-10-10 22:05:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-10 22:05:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2024-10-10 22:05:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:59,175 INFO L225 Difference]: With dead ends: 59 [2024-10-10 22:05:59,175 INFO L226 Difference]: Without dead ends: 37 [2024-10-10 22:05:59,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-10 22:05:59,176 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:59,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-10 22:05:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2024-10-10 22:05:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-10 22:05:59,183 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 36 [2024-10-10 22:05:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:59,183 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-10 22:05:59,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:05:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-10 22:05:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-10 22:05:59,184 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:59,185 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:59,198 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 22:05:59,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:59,388 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:05:59,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:05:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -451932245, now seen corresponding path program 2 times [2024-10-10 22:05:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:05:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297342843] [2024-10-10 22:05:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:05:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:05:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 22:05:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,507 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-10 22:05:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-10 22:05:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:05:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-10-10 22:05:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:05:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297342843] [2024-10-10 22:05:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297342843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:05:59,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179836880] [2024-10-10 22:05:59,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:05:59,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:05:59,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:05:59,525 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 22:05:59,526 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 22:05:59,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:05:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:05:59,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:05:59,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:05:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:05:59,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:05:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 22:05:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179836880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:05:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:05:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 22:05:59,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432353340] [2024-10-10 22:05:59,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:05:59,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 22:05:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:05:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 22:05:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:05:59,758 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:05:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:05:59,815 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2024-10-10 22:05:59,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:05:59,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2024-10-10 22:05:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:05:59,818 INFO L225 Difference]: With dead ends: 67 [2024-10-10 22:05:59,818 INFO L226 Difference]: Without dead ends: 40 [2024-10-10 22:05:59,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 22:05:59,819 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:05:59,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 147 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:05:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-10 22:05:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-10 22:05:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:05:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-10 22:05:59,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2024-10-10 22:05:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:05:59,831 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-10 22:05:59,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-10 22:05:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-10 22:05:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 22:05:59,835 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:05:59,835 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:05:59,855 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 22:06:00,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:00,036 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:00,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash -835342797, now seen corresponding path program 3 times [2024-10-10 22:06:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:00,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220835088] [2024-10-10 22:06:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:00,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:00,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:06:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:00,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 22:06:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:00,181 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 22:06:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:06:00,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220835088] [2024-10-10 22:06:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220835088] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925383747] [2024-10-10 22:06:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:06:00,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:00,191 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 22:06:00,192 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 22:06:00,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 22:06:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:00,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 22:06:00,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-10-10 22:06:00,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-10-10 22:06:00,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925383747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:00,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-10 22:06:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500791028] [2024-10-10 22:06:00,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:00,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-10 22:06:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:00,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-10 22:06:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:06:00,393 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:00,449 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2024-10-10 22:06:00,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:06:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2024-10-10 22:06:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:00,454 INFO L225 Difference]: With dead ends: 79 [2024-10-10 22:06:00,454 INFO L226 Difference]: Without dead ends: 53 [2024-10-10 22:06:00,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-10 22:06:00,455 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:00,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:06:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-10 22:06:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-10-10 22:06:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-10 22:06:00,467 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 55 [2024-10-10 22:06:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:00,468 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-10 22:06:00,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-10 22:06:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-10 22:06:00,471 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:00,471 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:00,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:00,672 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,SelfDestructingSolverStorable5 [2024-10-10 22:06:00,673 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:00,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash 976023832, now seen corresponding path program 4 times [2024-10-10 22:06:00,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:00,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410028060] [2024-10-10 22:06:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:00,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:00,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 22:06:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,004 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-10 22:06:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-10 22:06:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-10 22:06:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:01,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410028060] [2024-10-10 22:06:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410028060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132924405] [2024-10-10 22:06:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:06:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:01,033 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 22:06:01,041 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 22:06:01,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:06:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:01,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-10 22:06:01,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2024-10-10 22:06:01,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-10-10 22:06:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132924405] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:01,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:01,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2024-10-10 22:06:01,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306668192] [2024-10-10 22:06:01,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:01,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:06:01,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:01,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:06:01,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:06:01,344 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:01,411 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2024-10-10 22:06:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 22:06:01,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2024-10-10 22:06:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:01,412 INFO L225 Difference]: With dead ends: 112 [2024-10-10 22:06:01,413 INFO L226 Difference]: Without dead ends: 75 [2024-10-10 22:06:01,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:06:01,414 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:01,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 177 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-10 22:06:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-10 22:06:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-10-10 22:06:01,422 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 68 [2024-10-10 22:06:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:01,422 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-10-10 22:06:01,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-10-10 22:06:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-10-10 22:06:01,424 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:01,424 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:01,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:01,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:01,629 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:01,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1259784799, now seen corresponding path program 5 times [2024-10-10 22:06:01,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775881253] [2024-10-10 22:06:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 22:06:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-10 22:06:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-10 22:06:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2024-10-10 22:06:01,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775881253] [2024-10-10 22:06:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775881253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331557048] [2024-10-10 22:06:01,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:06:01,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:01,985 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 22:06:01,987 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 22:06:02,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-10-10 22:06:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:02,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-10 22:06:02,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2024-10-10 22:06:02,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-10-10 22:06:03,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331557048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:03,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:03,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-10-10 22:06:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671589044] [2024-10-10 22:06:03,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:03,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-10 22:06:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:03,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-10 22:06:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:06:03,104 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:03,248 INFO L93 Difference]: Finished difference Result 188 states and 261 transitions. [2024-10-10 22:06:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:06:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2024-10-10 22:06:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:03,252 INFO L225 Difference]: With dead ends: 188 [2024-10-10 22:06:03,253 INFO L226 Difference]: Without dead ends: 126 [2024-10-10 22:06:03,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2024-10-10 22:06:03,257 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 176 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:03,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 212 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:03,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-10 22:06:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-10-10 22:06:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-10-10 22:06:03,279 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 114 [2024-10-10 22:06:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:03,280 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-10-10 22:06:03,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 22:06:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-10-10 22:06:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-10-10 22:06:03,282 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:03,283 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:03,306 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 22:06:03,483 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,SelfDestructingSolverStorable7 [2024-10-10 22:06:03,484 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:03,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1716270413, now seen corresponding path program 6 times [2024-10-10 22:06:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301888691] [2024-10-10 22:06:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:03,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-10 22:06:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:04,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-10-10 22:06:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:04,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-10-10 22:06:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2024-10-10 22:06:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301888691] [2024-10-10 22:06:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301888691] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462450327] [2024-10-10 22:06:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:06:04,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:04,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:04,079 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 22:06:04,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:06:04,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-10 22:06:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:04,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:06:04,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2024-10-10 22:06:04,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2024-10-10 22:06:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462450327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:04,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-10 22:06:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331118306] [2024-10-10 22:06:04,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:04,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-10 22:06:04,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:04,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-10 22:06:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:06:04,805 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 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 22:06:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:04,860 INFO L93 Difference]: Finished difference Result 247 states and 335 transitions. [2024-10-10 22:06:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:06:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 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 205 [2024-10-10 22:06:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:04,863 INFO L225 Difference]: With dead ends: 247 [2024-10-10 22:06:04,864 INFO L226 Difference]: Without dead ends: 135 [2024-10-10 22:06:04,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-10 22:06:04,868 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:04,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:06:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-10 22:06:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-10 22:06:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3) internal successors, (169), 130 states have internal predecessors, (169), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2024-10-10 22:06:04,889 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 205 [2024-10-10 22:06:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:04,889 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2024-10-10 22:06:04,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 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 22:06:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2024-10-10 22:06:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-10-10 22:06:04,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:04,892 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:04,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 22:06:05,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:05,098 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:05,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -502425857, now seen corresponding path program 7 times [2024-10-10 22:06:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:05,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344502190] [2024-10-10 22:06:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:05,583 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-10 22:06:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:05,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-10 22:06:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:05,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-10 22:06:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:05,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344502190] [2024-10-10 22:06:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344502190] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:05,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531900005] [2024-10-10 22:06:05,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:06:05,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:05,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:05,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:06:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:06:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:05,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:06:05,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:05,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531900005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:06,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2024-10-10 22:06:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633910731] [2024-10-10 22:06:06,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:06,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-10 22:06:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-10 22:06:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:06:06,272 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:06,324 INFO L93 Difference]: Finished difference Result 270 states and 364 transitions. [2024-10-10 22:06:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:06:06,325 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2024-10-10 22:06:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:06,328 INFO L225 Difference]: With dead ends: 270 [2024-10-10 22:06:06,328 INFO L226 Difference]: Without dead ends: 150 [2024-10-10 22:06:06,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:06:06,330 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:06,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:06:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-10 22:06:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-10-10 22:06:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.2689655172413794) internal successors, (184), 145 states have internal predecessors, (184), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2024-10-10 22:06:06,348 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 214 [2024-10-10 22:06:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:06,348 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2024-10-10 22:06:06,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2024-10-10 22:06:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-10-10 22:06:06,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:06,351 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:06,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-10 22:06:06,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:06:06,556 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:06,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -970550605, now seen corresponding path program 8 times [2024-10-10 22:06:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538080269] [2024-10-10 22:06:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:07,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-10 22:06:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:07,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-10 22:06:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:07,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-10 22:06:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:07,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538080269] [2024-10-10 22:06:07,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538080269] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463345349] [2024-10-10 22:06:07,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:06:07,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:07,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:07,726 INFO L229 MonitoredProcess]: Starting monitored process 12 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 22:06:07,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:06:07,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:06:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:07,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-10 22:06:07,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:08,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:09,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463345349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:09,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:09,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2024-10-10 22:06:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984569128] [2024-10-10 22:06:09,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:09,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-10 22:06:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-10 22:06:09,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:06:09,190 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:09,272 INFO L93 Difference]: Finished difference Result 300 states and 409 transitions. [2024-10-10 22:06:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-10 22:06:09,273 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2024-10-10 22:06:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:09,274 INFO L225 Difference]: With dead ends: 300 [2024-10-10 22:06:09,274 INFO L226 Difference]: Without dead ends: 180 [2024-10-10 22:06:09,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:06:09,277 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:09,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-10 22:06:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-10-10 22:06:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.2228571428571429) internal successors, (214), 175 states have internal predecessors, (214), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 220 transitions. [2024-10-10 22:06:09,291 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 220 transitions. Word has length 229 [2024-10-10 22:06:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:09,291 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 220 transitions. [2024-10-10 22:06:09,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 22:06:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 220 transitions. [2024-10-10 22:06:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-10-10 22:06:09,295 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:09,295 INFO L215 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:09,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:09,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 22:06:09,496 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:09,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:09,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1749336371, now seen corresponding path program 9 times [2024-10-10 22:06:09,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:09,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903296333] [2024-10-10 22:06:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:12,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-10 22:06:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:12,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-10-10 22:06:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:12,634 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2024-10-10 22:06:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2024-10-10 22:06:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903296333] [2024-10-10 22:06:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903296333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045283397] [2024-10-10 22:06:12,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:06:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:12,655 INFO L229 MonitoredProcess]: Starting monitored process 13 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 22:06:12,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:06:13,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-10 22:06:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:13,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:06:13,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2024-10-10 22:06:14,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2024-10-10 22:06:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045283397] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:14,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:14,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2024-10-10 22:06:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701409703] [2024-10-10 22:06:14,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:14,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-10-10 22:06:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-10-10 22:06:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:06:14,841 INFO L87 Difference]: Start difference. First operand 180 states and 220 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 22:06:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:14,986 INFO L93 Difference]: Finished difference Result 317 states and 413 transitions. [2024-10-10 22:06:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-10-10 22:06:14,988 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 259 [2024-10-10 22:06:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:14,990 INFO L225 Difference]: With dead ends: 317 [2024-10-10 22:06:14,990 INFO L226 Difference]: Without dead ends: 197 [2024-10-10 22:06:14,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2024-10-10 22:06:14,994 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:14,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-10 22:06:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-10-10 22:06:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.203125) internal successors, (231), 192 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 237 transitions. [2024-10-10 22:06:15,002 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 237 transitions. Word has length 259 [2024-10-10 22:06:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:15,003 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 237 transitions. [2024-10-10 22:06:15,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 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 22:06:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 237 transitions. [2024-10-10 22:06:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-10-10 22:06:15,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:15,006 INFO L215 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:15,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:15,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:15,207 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:15,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 531745919, now seen corresponding path program 10 times [2024-10-10 22:06:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802725391] [2024-10-10 22:06:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:18,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-10 22:06:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:18,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-10-10 22:06:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:18,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2024-10-10 22:06:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2024-10-10 22:06:18,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:18,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802725391] [2024-10-10 22:06:18,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802725391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:18,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781399099] [2024-10-10 22:06:18,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:06:18,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:18,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:18,383 INFO L229 MonitoredProcess]: Starting monitored process 14 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 22:06:18,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:06:18,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:06:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:06:18,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-10 22:06:18,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:06:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:06:19,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:06:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2024-10-10 22:06:20,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781399099] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:06:20,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:06:20,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2024-10-10 22:06:20,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748317384] [2024-10-10 22:06:20,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:06:20,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-10-10 22:06:20,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:06:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-10-10 22:06:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:06:20,186 INFO L87 Difference]: Start difference. First operand 197 states and 237 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 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 22:06:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:06:20,494 INFO L93 Difference]: Finished difference Result 434 states and 577 transitions. [2024-10-10 22:06:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-10 22:06:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 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 276 [2024-10-10 22:06:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:06:20,497 INFO L225 Difference]: With dead ends: 434 [2024-10-10 22:06:20,497 INFO L226 Difference]: Without dead ends: 298 [2024-10-10 22:06:20,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:06:20,501 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 608 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:06:20,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 337 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:06:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-10-10 22:06:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2024-10-10 22:06:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2696245733788396) internal successors, (372), 293 states have internal predecessors, (372), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 22:06:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 378 transitions. [2024-10-10 22:06:20,520 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 378 transitions. Word has length 276 [2024-10-10 22:06:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:06:20,521 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 378 transitions. [2024-10-10 22:06:20,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 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 22:06:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 378 transitions. [2024-10-10 22:06:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2024-10-10 22:06:20,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:06:20,533 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:06:20,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-10 22:06:20,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:20,734 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:06:20,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:06:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1307286285, now seen corresponding path program 11 times [2024-10-10 22:06:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:06:20,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199394163] [2024-10-10 22:06:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:06:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:06:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:23,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-10 22:06:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:23,760 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2024-10-10 22:06:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:23,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2024-10-10 22:06:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:06:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2024-10-10 22:06:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:06:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199394163] [2024-10-10 22:06:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199394163] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:06:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210750742] [2024-10-10 22:06:23,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:06:23,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:06:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:06:23,818 INFO L229 MonitoredProcess]: Starting monitored process 15 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 22:06:23,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process