./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c -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 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 15:01:57,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 15:01:57,519 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 15:01:57,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 15:01:57,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 15:01:57,551 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 15:01:57,551 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 15:01:57,552 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 15:01:57,553 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 15:01:57,554 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 15:01:57,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 15:01:57,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 15:01:57,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 15:01:57,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 15:01:57,557 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 15:01:57,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 15:01:57,557 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 15:01:57,558 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 15:01:57,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 15:01:57,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 15:01:57,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 15:01:57,560 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 15:01:57,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 15:01:57,561 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 15:01:57,561 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 15:01:57,561 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 15:01:57,561 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 15:01:57,562 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 15:01:57,562 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 15:01:57,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 15:01:57,562 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 15:01:57,563 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 15:01:57,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:01:57,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 15:01:57,564 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 15:01:57,564 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 15:01:57,565 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 15:01:57,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 15:01:57,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 15:01:57,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 15:01:57,565 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 15:01:57,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 15:01:57,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14bc2dbf7c29b1d0f6a0a1f7aa323adbc9855e56ce7f667c86a31ecee97dcbe0 [2024-10-12 15:01:57,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 15:01:57,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 15:01:57,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 15:01:57,850 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 15:01:57,851 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 15:01:57,852 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2024-10-12 15:01:59,360 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 15:01:59,539 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 15:01:59,540 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2024-10-12 15:01:59,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccad3b031/f55ee2ba0227481b83441257fc5265ed/FLAG69b205eae [2024-10-12 15:01:59,558 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccad3b031/f55ee2ba0227481b83441257fc5265ed [2024-10-12 15:01:59,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 15:01:59,561 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 15:01:59,562 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 15:01:59,562 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 15:01:59,566 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 15:01:59,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfaa118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59, skipping insertion in model container [2024-10-12 15:01:59,568 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,588 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 15:01:59,772 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2024-10-12 15:01:59,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:01:59,840 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 15:01:59,875 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2024-10-12 15:01:59,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 15:01:59,910 INFO L204 MainTranslator]: Completed translation [2024-10-12 15:01:59,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59 WrapperNode [2024-10-12 15:01:59,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 15:01:59,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 15:01:59,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 15:01:59,912 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 15:01:59,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,949 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-10-12 15:01:59,950 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 15:01:59,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 15:01:59,951 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 15:01:59,951 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 15:01:59,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,965 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,978 INFO L175 MemorySlicer]: Split 17 memory accesses to 4 slices as follows [2, 7, 4, 4]. 41 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2024-10-12 15:01:59,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,994 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:01:59,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 15:02:00,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 15:02:00,001 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 15:02:00,001 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 15:02:00,002 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (1/1) ... [2024-10-12 15:02:00,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 15:02:00,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:00,033 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) [2024-10-12 15:02:00,035 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 [2024-10-12 15:02:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 15:02:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 15:02:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 15:02:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 15:02:00,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 15:02:00,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 15:02:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 15:02:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 15:02:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 15:02:00,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-12 15:02:00,161 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 15:02:00,163 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 15:02:00,296 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-12 15:02:00,296 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 15:02:00,333 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 15:02:00,336 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 15:02:00,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:02:00 BoogieIcfgContainer [2024-10-12 15:02:00,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 15:02:00,338 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 15:02:00,338 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 15:02:00,343 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 15:02:00,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:01:59" (1/3) ... [2024-10-12 15:02:00,344 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563dc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:02:00, skipping insertion in model container [2024-10-12 15:02:00,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:01:59" (2/3) ... [2024-10-12 15:02:00,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563dc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:02:00, skipping insertion in model container [2024-10-12 15:02:00,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:02:00" (3/3) ... [2024-10-12 15:02:00,347 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1.c [2024-10-12 15:02:00,361 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 15:02:00,361 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 15:02:00,417 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 15:02:00,423 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;@156a0444, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 15:02:00,424 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 15:02:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:02:00,432 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:00,433 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:00,433 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:00,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash 955298750, now seen corresponding path program 1 times [2024-10-12 15:02:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:00,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327996286] [2024-10-12 15:02:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327996286] [2024-10-12 15:02:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327996286] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:00,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:00,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:02:00,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495356448] [2024-10-12 15:02:00,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:00,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 15:02:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 15:02:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:02:00,694 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:00,734 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2024-10-12 15:02:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 15:02:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 15:02:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:00,744 INFO L225 Difference]: With dead ends: 29 [2024-10-12 15:02:00,744 INFO L226 Difference]: Without dead ends: 13 [2024-10-12 15:02:00,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 15:02:00,750 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:00,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-12 15:02:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-12 15:02:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-12 15:02:00,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-10-12 15:02:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:00,781 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-12 15:02:00,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-12 15:02:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 15:02:00,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:00,783 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:00,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 15:02:00,784 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:00,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1635357120, now seen corresponding path program 1 times [2024-10-12 15:02:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:00,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498840669] [2024-10-12 15:02:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266413753] [2024-10-12 15:02:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:00,890 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) [2024-10-12 15:02:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 15:02:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:00,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 15:02:01,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:01,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:02:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:01,148 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:02:01,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:01,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498840669] [2024-10-12 15:02:01,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:02:01,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266413753] [2024-10-12 15:02:01,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266413753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:01,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:01,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 15:02:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774586248] [2024-10-12 15:02:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:01,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:02:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:02:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:02:01,156 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:01,234 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-10-12 15:02:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:02:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-12 15:02:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:01,237 INFO L225 Difference]: With dead ends: 25 [2024-10-12 15:02:01,238 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 15:02:01,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-12 15:02:01,239 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:01,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:02:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 15:02:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2024-10-12 15:02:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-10-12 15:02:01,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2024-10-12 15:02:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:01,249 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-10-12 15:02:01,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-10-12 15:02:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 15:02:01,250 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:01,250 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:01,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:01,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:01,451 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:01,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 265370671, now seen corresponding path program 1 times [2024-10-12 15:02:01,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:01,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816714107] [2024-10-12 15:02:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816714107] [2024-10-12 15:02:01,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816714107] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:01,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:02:01,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 15:02:01,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305149953] [2024-10-12 15:02:01,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:01,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 15:02:01,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 15:02:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:02:01,639 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-12 15:02:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:01,695 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-10-12 15:02:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 15:02:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2024-10-12 15:02:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:01,697 INFO L225 Difference]: With dead ends: 32 [2024-10-12 15:02:01,698 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 15:02:01,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-12 15:02:01,701 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:01,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 15:02:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-12 15:02:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 15:02:01,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-12 15:02:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:01,708 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 15:02:01,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2024-10-12 15:02:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 15:02:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 15:02:01,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:01,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:01,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 15:02:01,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:01,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1093428625, now seen corresponding path program 1 times [2024-10-12 15:02:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441722617] [2024-10-12 15:02:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822227629] [2024-10-12 15:02:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:01,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:01,885 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) [2024-10-12 15:02:01,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 15:02:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:01,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 15:02:01,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:02,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:02:02,097 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 25 treesize of output 24 [2024-10-12 15:02:02,105 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 13 treesize of output 9 [2024-10-12 15:02:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:02,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:02,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:02,359 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 213 treesize of output 163 [2024-10-12 15:02:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441722617] [2024-10-12 15:02:02,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:02:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822227629] [2024-10-12 15:02:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822227629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:02,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:02:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2024-10-12 15:02:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687371935] [2024-10-12 15:02:02,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:02,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-12 15:02:02,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-12 15:02:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:02:02,512 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:02,707 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2024-10-12 15:02:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:02:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 13 [2024-10-12 15:02:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:02,709 INFO L225 Difference]: With dead ends: 44 [2024-10-12 15:02:02,709 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 15:02:02,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:02:02,712 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:02,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 52 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:02:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 15:02:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 22. [2024-10-12 15:02:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-12 15:02:02,725 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2024-10-12 15:02:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:02,726 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-12 15:02:02,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-12 15:02:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 15:02:02,726 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:02,726 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:02,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 15:02:02,927 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 [2024-10-12 15:02:02,928 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:02,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:02,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1115156774, now seen corresponding path program 1 times [2024-10-12 15:02:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:02,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289877751] [2024-10-12 15:02:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:02,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289877751] [2024-10-12 15:02:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289877751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151633158] [2024-10-12 15:02:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:03,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:03,069 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) [2024-10-12 15:02:03,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 15:02:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:03,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-12 15:02:03,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:03,222 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 15:02:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151633158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:02:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 15:02:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-12 15:02:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016141640] [2024-10-12 15:02:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:02:03,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-12 15:02:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:03,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-12 15:02:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-12 15:02:03,225 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:03,294 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-10-12 15:02:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-12 15:02:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 15:02:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:03,295 INFO L225 Difference]: With dead ends: 37 [2024-10-12 15:02:03,295 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 15:02:03,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-12 15:02:03,296 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:03,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:02:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 15:02:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-12 15:02:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 15:02:03,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2024-10-12 15:02:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:03,302 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 15:02:03,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 15:02:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-12 15:02:03,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:03,303 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:03,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 15:02:03,503 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 [2024-10-12 15:02:03,504 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:03,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1687586673, now seen corresponding path program 2 times [2024-10-12 15:02:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:03,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769238296] [2024-10-12 15:02:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:03,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769238296] [2024-10-12 15:02:03,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769238296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786587832] [2024-10-12 15:02:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:02:03,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:03,647 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) [2024-10-12 15:02:03,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 15:02:03,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:02:03,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:03,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 15:02:03,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:03,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:03,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786587832] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:03,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:03,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2024-10-12 15:02:03,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000517980] [2024-10-12 15:02:03,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:03,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-12 15:02:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-12 15:02:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-10-12 15:02:03,796 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:03,891 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-10-12 15:02:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 15:02:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 15 [2024-10-12 15:02:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:03,893 INFO L225 Difference]: With dead ends: 53 [2024-10-12 15:02:03,893 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 15:02:03,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:02:03,895 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:03,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:02:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 15:02:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2024-10-12 15:02:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-12 15:02:03,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2024-10-12 15:02:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:03,906 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-12 15:02:03,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:03,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-12 15:02:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 15:02:03,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:03,906 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:03,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 15:02:04,110 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 [2024-10-12 15:02:04,111 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:04,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1294961129, now seen corresponding path program 1 times [2024-10-12 15:02:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:04,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916937756] [2024-10-12 15:02:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755953897] [2024-10-12 15:02:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:04,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:04,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:04,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:04,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 15:02:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:04,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 15:02:04,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:04,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:02:04,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:02:04,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-12 15:02:04,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-12 15:02:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:04,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:04,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916937756] [2024-10-12 15:02:04,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-12 15:02:04,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755953897] [2024-10-12 15:02:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755953897] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:04,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-12 15:02:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2024-10-12 15:02:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110989340] [2024-10-12 15:02:04,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:04,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 15:02:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 15:02:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-12 15:02:04,924 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:05,745 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-10-12 15:02:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 15:02:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 15:02:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:05,746 INFO L225 Difference]: With dead ends: 63 [2024-10-12 15:02:05,746 INFO L226 Difference]: Without dead ends: 61 [2024-10-12 15:02:05,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-10-12 15:02:05,747 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 91 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:05,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 92 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:02:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-12 15:02:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2024-10-12 15:02:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-10-12 15:02:05,757 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 16 [2024-10-12 15:02:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:05,758 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-10-12 15:02:05,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-10-12 15:02:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 15:02:05,758 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:05,758 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:05,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-12 15:02:05,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:05,960 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:05,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1610649009, now seen corresponding path program 3 times [2024-10-12 15:02:05,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967451792] [2024-10-12 15:02:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:05,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:02:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:06,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:02:06,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967451792] [2024-10-12 15:02:06,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967451792] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:02:06,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678589818] [2024-10-12 15:02:06,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:02:06,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:06,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:06,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 15:02:06,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 15:02:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:06,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 15:02:06,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:06,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 15:02:06,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678589818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:02:06,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:02:06,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-12 15:02:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2947141] [2024-10-12 15:02:06,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:02:06,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 15:02:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:02:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 15:02:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-12 15:02:06,448 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:02:06,616 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2024-10-12 15:02:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-12 15:02:06,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 15:02:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:02:06,617 INFO L225 Difference]: With dead ends: 71 [2024-10-12 15:02:06,617 INFO L226 Difference]: Without dead ends: 57 [2024-10-12 15:02:06,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-10-12 15:02:06,618 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:02:06,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:02:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-12 15:02:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2024-10-12 15:02:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-10-12 15:02:06,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2024-10-12 15:02:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:02:06,635 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-10-12 15:02:06,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:02:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-10-12 15:02:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-12 15:02:06,636 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:02:06,636 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:02:06,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-12 15:02:06,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:06,837 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:02:06,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:02:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 774418575, now seen corresponding path program 4 times [2024-10-12 15:02:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:02:06,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085901748] [2024-10-12 15:02:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:02:06,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:02:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-12 15:02:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031127470] [2024-10-12 15:02:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:02:06,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:02:06,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:02:06,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 15:02:06,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 15:02:07,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:02:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:02:07,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-12 15:02:07,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:02:07,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-12 15:02:07,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-10-12 15:02:07,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:07,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 46 [2024-10-12 15:02:07,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 15:02:07,286 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 73 treesize of output 51 [2024-10-12 15:02:07,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-12 15:02:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 15:02:07,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:02:27,668 WARN L286 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 15:02:35,701 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 15:03:08,626 WARN L286 SmtUtils]: Spent 32.56s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-12 15:03:08,718 INFO L349 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2024-10-12 15:03:08,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 411 treesize of output 303 [2024-10-12 15:03:22,252 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-10-12 15:03:34,275 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)