./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:52:14,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:52:14,366 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:52:14,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:52:14,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:52:14,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:52:14,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:52:14,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:52:14,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:52:14,391 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:52:14,392 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:52:14,392 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:52:14,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:52:14,392 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:52:14,393 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:52:14,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:52:14,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:52:14,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:52:14,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:52:14,393 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:52:14,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:52:14,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:52:14,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:52:14,397 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:52:14,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:52:14,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:52:14,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:52:14,398 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:52:14,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:52:14,398 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:52:14,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:52:14,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:52:14,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:52:14,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:52:14,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:52:14,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:52:14,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:52:14,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:52:14,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:52:14,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:52:14,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:52:14,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:52:14,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2024-10-10 21:52:14,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:52:14,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:52:14,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:52:14,613 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:52:14,614 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:52:14,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2024-10-10 21:52:15,791 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:52:15,961 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:52:15,961 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2024-10-10 21:52:15,967 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4c8681823/d9d2f7ac7e6646d4a4a6506118e63cd5/FLAGff6304445 [2024-10-10 21:52:16,381 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4c8681823/d9d2f7ac7e6646d4a4a6506118e63cd5 [2024-10-10 21:52:16,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:52:16,384 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:52:16,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:52:16,386 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:52:16,390 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:52:16,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1825b42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16, skipping insertion in model container [2024-10-10 21:52:16,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,405 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:52:16,524 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-10-10 21:52:16,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:52:16,539 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:52:16,548 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-10-10 21:52:16,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:52:16,564 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:52:16,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16 WrapperNode [2024-10-10 21:52:16,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:52:16,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:52:16,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:52:16,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:52:16,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,600 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-10-10 21:52:16,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:52:16,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:52:16,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:52:16,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:52:16,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,614 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,626 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 3, 2]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-10 21:52:16,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,648 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:52:16,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:52:16,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:52:16,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:52:16,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (1/1) ... [2024-10-10 21:52:16,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:52:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:16,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 21:52:16,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:52:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 21:52:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:52:16,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:52:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:52:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:52:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 21:52:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:52:16,773 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:52:16,775 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:52:16,859 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-10 21:52:16,860 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:52:16,887 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:52:16,888 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:52:16,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:52:16 BoogieIcfgContainer [2024-10-10 21:52:16,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:52:16,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:52:16,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:52:16,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:52:16,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:52:16" (1/3) ... [2024-10-10 21:52:16,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21209497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:52:16, skipping insertion in model container [2024-10-10 21:52:16,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:52:16" (2/3) ... [2024-10-10 21:52:16,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21209497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:52:16, skipping insertion in model container [2024-10-10 21:52:16,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:52:16" (3/3) ... [2024-10-10 21:52:16,903 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2024-10-10 21:52:16,916 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:52:16,916 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:52:16,952 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:52:16,957 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;@393a6ce1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:52:16,957 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:52:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-10 21:52:16,964 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:16,964 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:16,964 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:16,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash 414171164, now seen corresponding path program 1 times [2024-10-10 21:52:16,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:16,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830872150] [2024-10-10 21:52:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:16,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:52:17,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830872150] [2024-10-10 21:52:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830872150] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:52:17,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:52:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 21:52:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146496916] [2024-10-10 21:52:17,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:52:17,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:52:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:52:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:52:17,162 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:17,197 INFO L93 Difference]: Finished difference Result 24 states and 38 transitions. [2024-10-10 21:52:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:52:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-10 21:52:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:17,204 INFO L225 Difference]: With dead ends: 24 [2024-10-10 21:52:17,204 INFO L226 Difference]: Without dead ends: 12 [2024-10-10 21:52:17,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:52:17,208 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:17,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:52:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-10-10 21:52:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-10-10 21:52:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-10-10 21:52:17,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2024-10-10 21:52:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:17,229 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-10-10 21:52:17,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-10-10 21:52:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 21:52:17,230 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:17,230 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:17,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 21:52:17,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:17,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash 983251984, now seen corresponding path program 1 times [2024-10-10 21:52:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151929569] [2024-10-10 21:52:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 21:52:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151929569] [2024-10-10 21:52:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151929569] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384338406] [2024-10-10 21:52:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:17,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:17,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:17,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 21:52:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:17,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:52:17,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 21:52:17,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 21:52:17,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384338406] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-10 21:52:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669917372] [2024-10-10 21:52:17,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:17,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:52:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:52:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:52:17,465 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:17,497 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2024-10-10 21:52:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 21:52:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-10 21:52:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:17,498 INFO L225 Difference]: With dead ends: 27 [2024-10-10 21:52:17,498 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 21:52:17,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:52:17,499 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:17,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:52:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 21:52:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-10 21:52:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-10-10 21:52:17,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2024-10-10 21:52:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:17,506 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-10-10 21:52:17,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-10-10 21:52:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-10 21:52:17,507 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:17,507 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:17,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 21:52:17,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:17,708 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:17,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -111201892, now seen corresponding path program 2 times [2024-10-10 21:52:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:17,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95542361] [2024-10-10 21:52:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 21:52:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95542361] [2024-10-10 21:52:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95542361] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744660417] [2024-10-10 21:52:17,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:52:17,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:17,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:17,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:17,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 21:52:17,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:52:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:52:17,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:52:17,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 21:52:17,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 21:52:18,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744660417] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:18,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:18,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-10 21:52:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629852129] [2024-10-10 21:52:18,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:18,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-10 21:52:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-10 21:52:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 21:52:18,014 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:18,077 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-10-10 21:52:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 21:52:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-10 21:52:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:18,077 INFO L225 Difference]: With dead ends: 42 [2024-10-10 21:52:18,078 INFO L226 Difference]: Without dead ends: 30 [2024-10-10 21:52:18,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 21:52:18,079 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:18,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:52:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-10 21:52:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-10 21:52:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-10-10 21:52:18,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2024-10-10 21:52:18,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:18,089 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-10-10 21:52:18,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-10-10 21:52:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 21:52:18,089 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:18,089 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:18,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 21:52:18,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:18,291 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:18,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1932837924, now seen corresponding path program 3 times [2024-10-10 21:52:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830503071] [2024-10-10 21:52:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-10 21:52:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830503071] [2024-10-10 21:52:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830503071] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281630906] [2024-10-10 21:52:18,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:52:18,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:18,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:18,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 21:52:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 21:52:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:52:18,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-10 21:52:18,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:18,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-10 21:52:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-10 21:52:18,811 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:52:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281630906] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:52:18,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:52:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 17 [2024-10-10 21:52:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958408356] [2024-10-10 21:52:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:52:18,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:52:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:18,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:52:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2024-10-10 21:52:18,813 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:18,885 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-10-10 21:52:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-10 21:52:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-10 21:52:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:18,886 INFO L225 Difference]: With dead ends: 35 [2024-10-10 21:52:18,887 INFO L226 Difference]: Without dead ends: 33 [2024-10-10 21:52:18,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-10-10 21:52:18,888 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:18,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:52:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-10 21:52:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-10-10 21:52:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-10-10 21:52:18,894 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2024-10-10 21:52:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:18,894 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-10-10 21:52:18,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-10-10 21:52:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 21:52:18,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:18,895 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:18,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 21:52:19,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:19,099 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:19,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1457045890, now seen corresponding path program 1 times [2024-10-10 21:52:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:19,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157303099] [2024-10-10 21:52:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:19,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-10 21:52:19,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157303099] [2024-10-10 21:52:19,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157303099] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793330544] [2024-10-10 21:52:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:19,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:19,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 21:52:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:19,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-10 21:52:19,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-10 21:52:19,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-10 21:52:19,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793330544] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:19,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:19,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-10 21:52:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113971257] [2024-10-10 21:52:19,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:19,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-10 21:52:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-10 21:52:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:52:19,591 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:19,708 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2024-10-10 21:52:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-10 21:52:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-10 21:52:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:19,709 INFO L225 Difference]: With dead ends: 76 [2024-10-10 21:52:19,709 INFO L226 Difference]: Without dead ends: 56 [2024-10-10 21:52:19,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 21:52:19,711 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:19,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:52:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-10 21:52:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-10-10 21:52:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-10-10 21:52:19,720 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 31 [2024-10-10 21:52:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:19,720 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-10-10 21:52:19,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-10-10 21:52:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 21:52:19,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:19,721 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:19,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-10 21:52:19,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:19,926 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:19,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -714236670, now seen corresponding path program 2 times [2024-10-10 21:52:19,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242155329] [2024-10-10 21:52:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-10 21:52:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242155329] [2024-10-10 21:52:20,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242155329] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:20,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555507960] [2024-10-10 21:52:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:52:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:20,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:20,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 21:52:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:52:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:52:20,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-10 21:52:20,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-10 21:52:20,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-10-10 21:52:21,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555507960] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:21,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:21,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-10-10 21:52:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436754773] [2024-10-10 21:52:21,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:21,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-10 21:52:21,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-10 21:52:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 21:52:21,287 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:21,498 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2024-10-10 21:52:21,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-10 21:52:21,498 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-10 21:52:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:21,499 INFO L225 Difference]: With dead ends: 136 [2024-10-10 21:52:21,499 INFO L226 Difference]: Without dead ends: 104 [2024-10-10 21:52:21,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 21:52:21,501 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:21,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 21:52:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-10 21:52:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-10 21:52:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2024-10-10 21:52:21,520 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 55 [2024-10-10 21:52:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:21,520 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2024-10-10 21:52:21,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2024-10-10 21:52:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-10 21:52:21,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:21,522 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:21,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 21:52:21,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:21,728 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:21,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash -475769854, now seen corresponding path program 3 times [2024-10-10 21:52:21,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:21,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547953844] [2024-10-10 21:52:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2024-10-10 21:52:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547953844] [2024-10-10 21:52:23,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547953844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:23,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321426803] [2024-10-10 21:52:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:52:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:23,440 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:23,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 21:52:23,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-10 21:52:23,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:52:23,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 21:52:23,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:23,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-10 21:52:23,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2024-10-10 21:52:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 90 proven. 3 refuted. 0 times theorem prover too weak. 2071 trivial. 0 not checked. [2024-10-10 21:52:23,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2164 backedges. 90 proven. 3 refuted. 0 times theorem prover too weak. 2071 trivial. 0 not checked. [2024-10-10 21:52:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321426803] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:24,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:24,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 8, 8] total 62 [2024-10-10 21:52:24,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346305114] [2024-10-10 21:52:24,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:24,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-10 21:52:24,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-10 21:52:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1321, Invalid=2461, Unknown=0, NotChecked=0, Total=3782 [2024-10-10 21:52:24,160 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:31,239 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2024-10-10 21:52:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-10-10 21:52:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-10-10 21:52:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:31,241 INFO L225 Difference]: With dead ends: 217 [2024-10-10 21:52:31,243 INFO L226 Difference]: Without dead ends: 161 [2024-10-10 21:52:31,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11249 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=12434, Invalid=31038, Unknown=0, NotChecked=0, Total=43472 [2024-10-10 21:52:31,254 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:31,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 21:52:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-10 21:52:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2024-10-10 21:52:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2024-10-10 21:52:31,280 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 103 [2024-10-10 21:52:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:31,281 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2024-10-10 21:52:31,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2024-10-10 21:52:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-10-10 21:52:31,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:31,283 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:31,295 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 21:52:31,485 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,SelfDestructingSolverStorable6 [2024-10-10 21:52:31,485 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:31,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 440050064, now seen corresponding path program 4 times [2024-10-10 21:52:31,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:31,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840505899] [2024-10-10 21:52:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2024-10-10 21:52:32,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840505899] [2024-10-10 21:52:32,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840505899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:32,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666694718] [2024-10-10 21:52:32,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:52:32,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:32,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:32,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 21:52:33,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:52:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:52:33,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-10 21:52:33,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:52:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2024-10-10 21:52:33,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:52:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2263 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2024-10-10 21:52:35,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666694718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:52:35,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:52:35,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2024-10-10 21:52:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627068983] [2024-10-10 21:52:35,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:52:35,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-10-10 21:52:35,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:52:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-10-10 21:52:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-10-10 21:52:35,081 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:52:35,653 INFO L93 Difference]: Finished difference Result 267 states and 368 transitions. [2024-10-10 21:52:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-10-10 21:52:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2024-10-10 21:52:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:52:35,654 INFO L225 Difference]: With dead ends: 267 [2024-10-10 21:52:35,654 INFO L226 Difference]: Without dead ends: 207 [2024-10-10 21:52:35,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2024-10-10 21:52:35,656 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 21:52:35,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 21:52:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-10 21:52:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-10-10 21:52:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2024-10-10 21:52:35,689 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 108 [2024-10-10 21:52:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:52:35,689 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2024-10-10 21:52:35,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:52:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2024-10-10 21:52:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-10-10 21:52:35,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:52:35,693 INFO L215 NwaCegarLoop]: trace histogram [96, 96, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:52:35,706 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 21:52:35,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:35,893 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:52:35,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:52:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash -133658020, now seen corresponding path program 5 times [2024-10-10 21:52:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:52:35,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543389590] [2024-10-10 21:52:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:52:35,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:52:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:52:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9319 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 4663 trivial. 0 not checked. [2024-10-10 21:52:40,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:52:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543389590] [2024-10-10 21:52:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543389590] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:52:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656253604] [2024-10-10 21:52:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:52:40,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:52:40,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:52:40,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:52:40,748 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