./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_two_index_03.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_two_index_03.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 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:53:47,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:53:47,808 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:53:47,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:53:47,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:53:47,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:53:47,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:53:47,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:53:47,855 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:53:47,856 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:53:47,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:53:47,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:53:47,858 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:53:47,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:53:47,858 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:53:47,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:53:47,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:53:47,861 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:53:47,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:53:47,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:53:47,865 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:53:47,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:53:47,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:53:47,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:53:47,866 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:53:47,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:53:47,867 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:53:47,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:53:47,867 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:53:47,867 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:53:47,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:53:47,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:53:47,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:53:47,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:53:47,868 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:53:47,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:53:47,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:53:47,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:53:47,871 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:53:47,872 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:53:47,872 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:53:47,872 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:53:47,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 [2024-10-10 21:53:48,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:53:48,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:53:48,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:53:48,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:53:48,186 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:53:48,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i [2024-10-10 21:53:49,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:53:49,825 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:53:49,826 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i [2024-10-10 21:53:49,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9282357d8/6ef427581d8b4488bd80e4c2dcb975f7/FLAGd63bf2d12 [2024-10-10 21:53:50,205 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/9282357d8/6ef427581d8b4488bd80e4c2dcb975f7 [2024-10-10 21:53:50,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:53:50,209 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:53:50,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:53:50,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:53:50,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:53:50,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52256c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50, skipping insertion in model container [2024-10-10 21:53:50,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:53:50,427 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_two_index_03.i[814,827] [2024-10-10 21:53:50,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:53:50,460 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:53:50,472 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_two_index_03.i[814,827] [2024-10-10 21:53:50,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:53:50,497 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:53:50,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50 WrapperNode [2024-10-10 21:53:50,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:53:50,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:53:50,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:53:50,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:53:50,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,533 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-10-10 21:53:50,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:53:50,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:53:50,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:53:50,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:53:50,545 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,546 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,560 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 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 21:53:50,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,570 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,572 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:53:50,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:53:50,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:53:50,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:53:50,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (1/1) ... [2024-10-10 21:53:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:53:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:50,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 21:53:50,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 21:53:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:53:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:53:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:53:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 21:53:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:53:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:53:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:53:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 21:53:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:53:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:53:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:53:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:53:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 21:53:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:53:50,769 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:53:50,771 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:53:50,935 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-10 21:53:50,935 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:53:50,973 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:53:50,973 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:53:50,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:53:50 BoogieIcfgContainer [2024-10-10 21:53:50,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:53:50,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:53:50,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:53:50,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:53:50,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:53:50" (1/3) ... [2024-10-10 21:53:50,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6904cc81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:53:50, skipping insertion in model container [2024-10-10 21:53:50,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:53:50" (2/3) ... [2024-10-10 21:53:50,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6904cc81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:53:50, skipping insertion in model container [2024-10-10 21:53:50,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:53:50" (3/3) ... [2024-10-10 21:53:50,984 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2024-10-10 21:53:51,001 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:53:51,001 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:53:51,060 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:53:51,066 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;@60d3e92a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:53:51,067 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:53:51,070 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 21:53:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-10 21:53:51,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:51,076 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:51,076 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:51,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1148868036, now seen corresponding path program 1 times [2024-10-10 21:53:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441220824] [2024-10-10 21:53:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:51,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:51,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441220824] [2024-10-10 21:53:51,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441220824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:53:51,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 21:53:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 21:53:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238542548] [2024-10-10 21:53:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:53:51,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:53:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:53:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:53:51,310 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 21:53:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:51,352 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2024-10-10 21:53:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:53:51,354 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 21:53:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:51,360 INFO L225 Difference]: With dead ends: 23 [2024-10-10 21:53:51,360 INFO L226 Difference]: Without dead ends: 11 [2024-10-10 21:53:51,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 21:53:51,366 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:51,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-10 21:53:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-10 21:53:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-10 21:53:51,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2024-10-10 21:53:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:51,397 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-10 21:53:51,397 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 21:53:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-10 21:53:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-10 21:53:51,398 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:51,398 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:51,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 21:53:51,399 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:51,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash -790446873, now seen corresponding path program 1 times [2024-10-10 21:53:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:51,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594696672] [2024-10-10 21:53:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 21:53:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594696672] [2024-10-10 21:53:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594696672] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279419819] [2024-10-10 21:53:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:51,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:51,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:51,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 21:53:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:51,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:53:51,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 21:53:51,642 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:53:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279419819] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:53:51,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:53:51,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-10-10 21:53:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798082404] [2024-10-10 21:53:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:53:51,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:53:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:53:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:53:51,645 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:51,679 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-10 21:53:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:53:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-10 21:53:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:51,681 INFO L225 Difference]: With dead ends: 23 [2024-10-10 21:53:51,681 INFO L226 Difference]: Without dead ends: 17 [2024-10-10 21:53:51,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:53:51,683 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 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 21:53:51,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-10 21:53:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2024-10-10 21:53:51,688 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 21:53:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-10-10 21:53:51,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2024-10-10 21:53:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:51,690 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-10-10 21:53:51,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-10-10 21:53:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 21:53:51,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:51,692 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:51,707 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 21:53:51,896 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 21:53:51,897 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:51,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1317396867, now seen corresponding path program 1 times [2024-10-10 21:53:51,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:51,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695085368] [2024-10-10 21:53:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:51,969 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 21:53:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695085368] [2024-10-10 21:53:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695085368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747208131] [2024-10-10 21:53:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:51,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:51,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:51,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 21:53:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:52,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:53:52,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:52,093 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 21:53:52,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:52,157 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 21:53:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747208131] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:52,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:52,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-10 21:53:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240636628] [2024-10-10 21:53:52,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:52,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:53:52,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:53:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:53:52,159 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 21:53:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:52,216 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-10-10 21:53:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 21:53:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-10 21:53:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:52,218 INFO L225 Difference]: With dead ends: 35 [2024-10-10 21:53:52,219 INFO L226 Difference]: Without dead ends: 26 [2024-10-10 21:53:52,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:53:52,221 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:52,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:53:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-10 21:53:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2024-10-10 21:53:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-10 21:53:52,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-10-10 21:53:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:52,230 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-10 21:53:52,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-10 21:53:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-10 21:53:52,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:52,231 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:52,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 21:53:52,435 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 21:53:52,436 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:52,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1476057404, now seen corresponding path program 2 times [2024-10-10 21:53:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:52,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081297870] [2024-10-10 21:53:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-10 21:53:52,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:52,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081297870] [2024-10-10 21:53:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081297870] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494089031] [2024-10-10 21:53:52,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:53:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:52,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:52,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:52,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 21:53:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:53:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:52,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:53:52,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:52,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-10 21:53:52,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494089031] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:52,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-10-10 21:53:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443674374] [2024-10-10 21:53:52,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:52,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 21:53:52,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 21:53:52,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:53:52,780 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:52,860 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-10 21:53:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 21:53:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 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 14 [2024-10-10 21:53:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:52,862 INFO L225 Difference]: With dead ends: 61 [2024-10-10 21:53:52,862 INFO L226 Difference]: Without dead ends: 51 [2024-10-10 21:53:52,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:53:52,863 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:52,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:53:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-10 21:53:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2024-10-10 21:53:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-10-10 21:53:52,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2024-10-10 21:53:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:52,872 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-10-10 21:53:52,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-10-10 21:53:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-10 21:53:52,873 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:52,873 INFO L215 NwaCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:52,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-10 21:53:53,077 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 21:53:53,078 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:53,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 92870755, now seen corresponding path program 3 times [2024-10-10 21:53:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:53,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365702048] [2024-10-10 21:53:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:53,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-10 21:53:53,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365702048] [2024-10-10 21:53:53,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365702048] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305671552] [2024-10-10 21:53:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:53:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:53,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:53,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 21:53:53,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 21:53:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:53,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 21:53:53,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-10 21:53:53,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-10 21:53:53,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305671552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:53,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:53,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-10-10 21:53:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660669087] [2024-10-10 21:53:53,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:53,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-10 21:53:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-10 21:53:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-10 21:53:53,528 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:53,643 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-10-10 21:53:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-10 21:53:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-10 21:53:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:53,645 INFO L225 Difference]: With dead ends: 103 [2024-10-10 21:53:53,645 INFO L226 Difference]: Without dead ends: 90 [2024-10-10 21:53:53,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-10 21:53:53,647 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:53,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 40 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 21:53:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-10 21:53:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 34. [2024-10-10 21:53:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-10-10 21:53:53,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2024-10-10 21:53:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:53,654 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-10-10 21:53:53,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-10-10 21:53:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-10 21:53:53,655 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:53,656 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:53,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 21:53:53,856 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 21:53:53,857 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:53,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1682876028, now seen corresponding path program 4 times [2024-10-10 21:53:53,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:53,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594945827] [2024-10-10 21:53:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:53,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-10 21:53:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594945827] [2024-10-10 21:53:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594945827] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687283119] [2024-10-10 21:53:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:53:54,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:54,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 21:53:54,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:53:54,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:53:54,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-10 21:53:54,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:53:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-10 21:53:54,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:53:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-10 21:53:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687283119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:53:54,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:53:54,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2024-10-10 21:53:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250563146] [2024-10-10 21:53:54,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:53:54,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-10 21:53:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:53:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-10 21:53:54,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 21:53:54,774 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:53:54,999 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2024-10-10 21:53:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-10 21:53:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 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 32 [2024-10-10 21:53:55,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:53:55,001 INFO L225 Difference]: With dead ends: 169 [2024-10-10 21:53:55,001 INFO L226 Difference]: Without dead ends: 149 [2024-10-10 21:53:55,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 21:53:55,003 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 192 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 21:53:55,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 76 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 21:53:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-10 21:53:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 63. [2024-10-10 21:53:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-10-10 21:53:55,019 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 32 [2024-10-10 21:53:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:53:55,019 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-10-10 21:53:55,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 21:53:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-10-10 21:53:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-10 21:53:55,021 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:53:55,021 INFO L215 NwaCegarLoop]: trace histogram [35, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:53:55,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 21:53:55,225 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 21:53:55,226 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:53:55,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:53:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -435804665, now seen corresponding path program 5 times [2024-10-10 21:53:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:53:55,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723190906] [2024-10-10 21:53:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:53:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:53:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:53:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-10-10 21:53:55,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:53:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723190906] [2024-10-10 21:53:55,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723190906] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:53:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184916402] [2024-10-10 21:53:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:53:55,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:53:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:53:55,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:53:55,924 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