./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:11:03,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:11:03,958 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:11:03,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:11:03,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:11:03,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:11:03,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:11:03,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:11:03,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:11:03,987 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:11:03,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:11:03,988 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:11:03,988 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:11:03,989 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:11:03,989 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:11:03,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:11:03,990 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:11:03,990 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:11:03,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:11:03,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:11:03,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:11:03,992 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:11:03,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:11:03,992 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:11:03,993 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:11:03,993 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:11:03,993 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:11:03,994 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:11:03,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:11:03,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:11:03,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:11:03,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:11:03,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:11:03,995 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:11:03,996 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:11:03,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:11:03,996 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:11:03,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:11:03,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:11:03,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:11:03,998 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:11:03,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:11:03,998 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 [2024-11-18 13:11:04,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:11:04,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:11:04,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:11:04,269 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:11:04,270 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:11:04,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2024-11-18 13:11:05,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:11:05,876 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:11:05,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2024-11-18 13:11:05,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca120c342/8839f85644094881908b513e8183c5d7/FLAG883bee4d6 [2024-11-18 13:11:06,213 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca120c342/8839f85644094881908b513e8183c5d7 [2024-11-18 13:11:06,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:11:06,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:11:06,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:11:06,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:11:06,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:11:06,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554e2abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06, skipping insertion in model container [2024-11-18 13:11:06,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,267 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:11:06,597 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2024-11-18 13:11:06,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:11:06,610 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:11:06,655 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2024-11-18 13:11:06,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:11:06,694 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:11:06,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06 WrapperNode [2024-11-18 13:11:06,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:11:06,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:11:06,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:11:06,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:11:06,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,717 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,742 INFO L138 Inliner]: procedures = 123, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2024-11-18 13:11:06,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:11:06,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:11:06,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:11:06,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:11:06,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,758 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,771 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-18 13:11:06,772 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,772 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:11:06,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:11:06,795 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:11:06,795 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:11:06,797 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (1/1) ... [2024-11-18 13:11:06,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:11:06,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:11:06,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 13:11:06,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 13:11:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 13:11:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 13:11:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 13:11:06,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-18 13:11:06,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 13:11:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:11:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 13:11:06,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:11:06,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:11:06,983 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:11:06,985 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:11:07,192 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-18 13:11:07,192 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:11:07,207 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:11:07,207 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-18 13:11:07,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:07 BoogieIcfgContainer [2024-11-18 13:11:07,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:11:07,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:11:07,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:11:07,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:11:07,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:11:06" (1/3) ... [2024-11-18 13:11:07,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16336061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:11:07, skipping insertion in model container [2024-11-18 13:11:07,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:06" (2/3) ... [2024-11-18 13:11:07,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16336061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:11:07, skipping insertion in model container [2024-11-18 13:11:07,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:07" (3/3) ... [2024-11-18 13:11:07,217 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2024-11-18 13:11:07,235 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:11:07,235 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:11:07,303 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:11:07,309 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;@24607bcf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:11:07,309 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:11:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:11:07,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-18 13:11:07,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:07,319 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:07,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:07,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -91270904, now seen corresponding path program 1 times [2024-11-18 13:11:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985412161] [2024-11-18 13:11:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:07,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985412161] [2024-11-18 13:11:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985412161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:11:07,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:11:07,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:11:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27663213] [2024-11-18 13:11:07,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:11:07,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:11:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:11:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:11:07,649 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-18 13:11:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:07,713 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2024-11-18 13:11:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:11:07,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2024-11-18 13:11:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:07,724 INFO L225 Difference]: With dead ends: 52 [2024-11-18 13:11:07,724 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 13:11:07,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:11:07,729 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:07,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:11:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 13:11:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-11-18 13:11:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2024-11-18 13:11:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2024-11-18 13:11:07,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2024-11-18 13:11:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:07,753 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-18 13:11:07,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-18 13:11:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2024-11-18 13:11:07,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 13:11:07,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:07,754 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:07,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:11:07,755 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:07,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1034399597, now seen corresponding path program 1 times [2024-11-18 13:11:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883735901] [2024-11-18 13:11:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:07,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:07,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883735901] [2024-11-18 13:11:07,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883735901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:11:07,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:11:07,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:11:07,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453002560] [2024-11-18 13:11:07,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:11:07,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:11:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:07,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:11:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:11:07,913 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-11-18 13:11:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:07,943 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2024-11-18 13:11:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:11:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2024-11-18 13:11:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:07,946 INFO L225 Difference]: With dead ends: 46 [2024-11-18 13:11:07,946 INFO L226 Difference]: Without dead ends: 26 [2024-11-18 13:11:07,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:11:07,948 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:07,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:11:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-18 13:11:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-18 13:11:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2024-11-18 13:11:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2024-11-18 13:11:07,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2024-11-18 13:11:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:07,954 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2024-11-18 13:11:07,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-11-18 13:11:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2024-11-18 13:11:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 13:11:07,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:07,955 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:07,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:11:07,956 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:07,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash -776234159, now seen corresponding path program 1 times [2024-11-18 13:11:07,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:07,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624332940] [2024-11-18 13:11:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624332940] [2024-11-18 13:11:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624332940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:11:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554494006] [2024-11-18 13:11:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:11:08,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:11:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:11:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:08,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-18 13:11:08,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:11:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:08,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:11:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554494006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:11:08,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:11:08,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 13:11:08,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815833748] [2024-11-18 13:11:08,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:11:08,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:11:08,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:11:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:11:08,342 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2024-11-18 13:11:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:08,469 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-11-18 13:11:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:11:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 17 [2024-11-18 13:11:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:08,470 INFO L225 Difference]: With dead ends: 53 [2024-11-18 13:11:08,470 INFO L226 Difference]: Without dead ends: 38 [2024-11-18 13:11:08,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:11:08,471 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:08,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:11:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-18 13:11:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-18 13:11:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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) [2024-11-18 13:11:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-18 13:11:08,481 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2024-11-18 13:11:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:08,481 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-18 13:11:08,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2024-11-18 13:11:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-18 13:11:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 13:11:08,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:08,483 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:08,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:11:08,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:08,688 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:08,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -459646902, now seen corresponding path program 1 times [2024-11-18 13:11:08,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:08,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782011788] [2024-11-18 13:11:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782011788] [2024-11-18 13:11:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782011788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:11:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473005030] [2024-11-18 13:11:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:11:09,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:11:09,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:11:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:09,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 13:11:09,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:11:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:09,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:11:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:11:09,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473005030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:11:09,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:11:09,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-18 13:11:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921590317] [2024-11-18 13:11:09,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:11:09,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:11:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:11:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:11:09,356 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2024-11-18 13:11:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:09,441 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-18 13:11:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:11:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) Word has length 32 [2024-11-18 13:11:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:09,442 INFO L225 Difference]: With dead ends: 58 [2024-11-18 13:11:09,442 INFO L226 Difference]: Without dead ends: 43 [2024-11-18 13:11:09,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:11:09,444 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:09,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:11:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-18 13:11:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-18 13:11:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 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) [2024-11-18 13:11:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-18 13:11:09,454 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 32 [2024-11-18 13:11:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:09,455 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-18 13:11:09,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2024-11-18 13:11:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-18 13:11:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 13:11:09,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:09,457 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:09,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 13:11:09,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 13:11:09,658 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:09,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash -910589295, now seen corresponding path program 2 times [2024-11-18 13:11:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:09,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295382207] [2024-11-18 13:11:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:11:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:09,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:11:09,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:11:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:11:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295382207] [2024-11-18 13:11:10,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295382207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:11:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745327469] [2024-11-18 13:11:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:11:10,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:11:10,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:11:10,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 13:11:10,615 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:11:10,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:11:10,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-18 13:11:10,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:11:10,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-18 13:11:10,690 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-18 13:11:10,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-18 13:11:10,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2024-11-18 13:11:10,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-18 13:11:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:11:10,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:11:11,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:11:11,670 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 59 [2024-11-18 13:11:11,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:11:11,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 26 [2024-11-18 13:11:11,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-18 13:11:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:11:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745327469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:11:11,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:11:11,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-18 13:11:11,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113135055] [2024-11-18 13:11:11,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:11:11,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 13:11:11,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 13:11:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=318, Unknown=9, NotChecked=0, Total=380 [2024-11-18 13:11:11,734 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2024-11-18 13:11:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:12,336 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2024-11-18 13:11:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 13:11:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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 37 [2024-11-18 13:11:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:12,337 INFO L225 Difference]: With dead ends: 69 [2024-11-18 13:11:12,337 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 13:11:12,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=656, Unknown=11, NotChecked=0, Total=812 [2024-11-18 13:11:12,339 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:12,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 181 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 13:11:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 13:11:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2024-11-18 13:11:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 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) [2024-11-18 13:11:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-11-18 13:11:12,345 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 37 [2024-11-18 13:11:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:12,345 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-11-18 13:11:12,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2024-11-18 13:11:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-11-18 13:11:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 13:11:12,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:12,346 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:12,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 13:11:12,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:12,552 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:12,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -908742253, now seen corresponding path program 1 times [2024-11-18 13:11:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589997452] [2024-11-18 13:11:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:12,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 13:11:13,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:11:13,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589997452] [2024-11-18 13:11:13,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589997452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:11:13,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211202902] [2024-11-18 13:11:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:13,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:11:13,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 13:11:13,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 13:11:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:11:13,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-18 13:11:13,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:11:13,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-18 13:11:13,665 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-18 13:11:13,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-18 13:11:13,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 71 [2024-11-18 13:11:13,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 112 [2024-11-18 13:11:13,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:11:13,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 143 [2024-11-18 13:11:13,856 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 13:11:13,857 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 13:11:13,858 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-18 13:11:13,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 26 [2024-11-18 13:11:13,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 47 [2024-11-18 13:11:14,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:11:14,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 35 [2024-11-18 13:11:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:11:14,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:11:15,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 90 treesize of output 86 [2024-11-18 13:11:15,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 13:11:15,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 123 [2024-11-18 13:11:15,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2024-11-18 13:11:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 13:11:15,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211202902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:11:15,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:11:15,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2024-11-18 13:11:15,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743359633] [2024-11-18 13:11:15,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:11:15,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-18 13:11:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:11:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-18 13:11:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=571, Unknown=7, NotChecked=0, Total=650 [2024-11-18 13:11:15,142 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2024-11-18 13:11:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:11:15,747 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2024-11-18 13:11:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 13:11:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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 37 [2024-11-18 13:11:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:11:15,748 INFO L225 Difference]: With dead ends: 69 [2024-11-18 13:11:15,748 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 13:11:15,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=1030, Unknown=7, NotChecked=0, Total=1190 [2024-11-18 13:11:15,750 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 13:11:15,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 174 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 13:11:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 13:11:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2024-11-18 13:11:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 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) [2024-11-18 13:11:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-11-18 13:11:15,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 37 [2024-11-18 13:11:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:11:15,758 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-11-18 13:11:15,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 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) [2024-11-18 13:11:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-11-18 13:11:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 13:11:15,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:11:15,759 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:11:15,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 13:11:15,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:11:15,960 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:11:15,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:11:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash -908740331, now seen corresponding path program 1 times [2024-11-18 13:11:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:11:15,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999423186] [2024-11-18 13:11:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:11:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:11:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-18 13:11:16,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-18 13:11:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-18 13:11:16,099 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-18 13:11:16,100 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-18 13:11:16,101 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-18 13:11:16,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 13:11:16,106 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2024-11-18 13:11:16,137 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-18 13:11:16,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:11:16 BoogieIcfgContainer [2024-11-18 13:11:16,140 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-18 13:11:16,141 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-18 13:11:16,141 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-18 13:11:16,141 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-18 13:11:16,142 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:07" (3/4) ... [2024-11-18 13:11:16,144 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-18 13:11:16,202 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-18 13:11:16,202 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-18 13:11:16,203 INFO L158 Benchmark]: Toolchain (without parser) took 9986.44ms. Allocated memory was 148.9MB in the beginning and 251.7MB in the end (delta: 102.8MB). Free memory was 92.6MB in the beginning and 155.2MB in the end (delta: -62.6MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,203 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 148.9MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 13:11:16,203 INFO L158 Benchmark]: CACSL2BoogieTranslator took 478.10ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 72.2MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,203 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.26ms. Allocated memory is still 148.9MB. Free memory was 72.2MB in the beginning and 70.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,203 INFO L158 Benchmark]: Boogie Preprocessor took 49.75ms. Allocated memory is still 148.9MB. Free memory was 70.1MB in the beginning and 67.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,204 INFO L158 Benchmark]: RCFGBuilder took 413.13ms. Allocated memory is still 148.9MB. Free memory was 67.5MB in the beginning and 52.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,204 INFO L158 Benchmark]: TraceAbstraction took 8929.93ms. Allocated memory was 148.9MB in the beginning and 251.7MB in the end (delta: 102.8MB). Free memory was 51.7MB in the beginning and 158.3MB in the end (delta: -106.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 13:11:16,204 INFO L158 Benchmark]: Witness Printer took 61.52ms. Allocated memory is still 251.7MB. Free memory was 158.3MB in the beginning and 155.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:11:16,205 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 148.9MB. Free memory is still 112.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 478.10ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 72.2MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.26ms. Allocated memory is still 148.9MB. Free memory was 72.2MB in the beginning and 70.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.75ms. Allocated memory is still 148.9MB. Free memory was 70.1MB in the beginning and 67.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 413.13ms. Allocated memory is still 148.9MB. Free memory was 67.5MB in the beginning and 52.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8929.93ms. Allocated memory was 148.9MB in the beginning and 251.7MB in the end (delta: 102.8MB). Free memory was 51.7MB in the beginning and 158.3MB in the end (delta: -106.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 61.52ms. Allocated memory is still 251.7MB. Free memory was 158.3MB in the beginning and 155.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L600] CALL, EXPR dll_create(len) [L579] DLL head = ((void *)0); VAL [head={0:0}, len=5] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [head={0:0}, len=5, new_head={-1:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [head={-1:0}, len=4, new_head={-2:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [head={-2:0}, len=3, new_head={-3:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [head={-3:0}, len=2, new_head={-4:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [head={-4:0}, len=1, new_head={-5:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) VAL [head={-5:0}] [L596] return head; VAL [\result={-5:0}] [L600] RET, EXPR dll_create(len) [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [head={-5:0}] [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 VAL [head={-5:0}] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [head={-5:0}] [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [head={-5:0}] [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() VAL [head={-5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 107 mSDsluCounter, 673 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 530 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 725 IncrementalHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 143 mSDtfsCounter, 725 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 223 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 312 NumberOfCodeBlocks, 312 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 384 ConstructedInterpolants, 2 QuantifiedInterpolants, 1560 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1438 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 289/436 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-18 13:11:16,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE