./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const2.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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 09:12:46,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 09:12:47,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 09:12:47,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 09:12:47,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 09:12:47,062 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 09:12:47,064 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 09:12:47,064 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 09:12:47,065 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 09:12:47,066 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 09:12:47,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 09:12:47,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 09:12:47,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 09:12:47,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 09:12:47,069 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 09:12:47,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 09:12:47,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 09:12:47,070 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 09:12:47,070 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 09:12:47,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 09:12:47,071 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 09:12:47,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 09:12:47,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 09:12:47,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 09:12:47,076 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 09:12:47,076 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 09:12:47,076 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 09:12:47,076 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 09:12:47,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 09:12:47,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 09:12:47,077 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 09:12:47,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 09:12:47,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:12:47,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 09:12:47,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 09:12:47,079 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 09:12:47,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 09:12:47,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 09:12:47,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 09:12:47,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 09:12:47,080 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 09:12:47,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 09:12:47,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2024-11-18 09:12:47,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 09:12:47,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 09:12:47,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 09:12:47,334 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 09:12:47,334 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 09:12:47,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2024-11-18 09:12:48,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 09:12:48,897 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 09:12:48,898 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2024-11-18 09:12:48,905 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bf413f03/bf1782afee23465599811099704266c5/FLAG72414d8af [2024-11-18 09:12:49,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bf413f03/bf1782afee23465599811099704266c5 [2024-11-18 09:12:49,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 09:12:49,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 09:12:49,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 09:12:49,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 09:12:49,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 09:12:49,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d8cd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49, skipping insertion in model container [2024-11-18 09:12:49,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,310 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 09:12:49,468 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2024-11-18 09:12:49,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:12:49,506 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 09:12:49,515 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2024-11-18 09:12:49,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 09:12:49,534 INFO L204 MainTranslator]: Completed translation [2024-11-18 09:12:49,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49 WrapperNode [2024-11-18 09:12:49,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 09:12:49,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 09:12:49,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 09:12:49,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 09:12:49,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,552 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,586 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2024-11-18 09:12:49,586 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 09:12:49,587 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 09:12:49,587 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 09:12:49,587 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 09:12:49,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,598 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,612 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-18 09:12:49,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,621 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 09:12:49,624 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 09:12:49,624 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 09:12:49,624 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 09:12:49,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (1/1) ... [2024-11-18 09:12:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 09:12:49,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:49,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 09:12:49,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 09:12:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 09:12:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 09:12:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 09:12:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 09:12:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 09:12:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-18 09:12:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 09:12:49,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 09:12:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 09:12:49,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 09:12:49,760 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 09:12:49,761 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 09:12:49,890 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-18 09:12:49,890 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 09:12:49,906 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 09:12:49,907 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-18 09:12:49,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:12:49 BoogieIcfgContainer [2024-11-18 09:12:49,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 09:12:49,909 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 09:12:49,909 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 09:12:49,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 09:12:49,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:12:49" (1/3) ... [2024-11-18 09:12:49,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611daca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:12:49, skipping insertion in model container [2024-11-18 09:12:49,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:12:49" (2/3) ... [2024-11-18 09:12:49,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611daca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:12:49, skipping insertion in model container [2024-11-18 09:12:49,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:12:49" (3/3) ... [2024-11-18 09:12:49,916 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2024-11-18 09:12:49,933 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 09:12:49,933 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 09:12:49,986 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 09:12:49,992 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;@33097a55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 09:12:49,992 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 09:12:49,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 09:12:50,002 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:50,003 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:50,004 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:50,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2024-11-18 09:12:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989797292] [2024-11-18 09:12:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:12:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:12:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989797292] [2024-11-18 09:12:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989797292] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:12:50,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:12:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-18 09:12:50,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757928446] [2024-11-18 09:12:50,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:12:50,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-18 09:12:50,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-18 09:12:50,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-18 09:12:50,221 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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 7.5) internal successors, (15), 2 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) [2024-11-18 09:12:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:50,235 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-18 09:12:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-18 09:12:50,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-18 09:12:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:50,244 INFO L225 Difference]: With dead ends: 47 [2024-11-18 09:12:50,244 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 09:12:50,247 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 [2024-11-18 09:12:50,249 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:50,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:12:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 09:12:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-18 09:12:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-18 09:12:50,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2024-11-18 09:12:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:50,302 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-18 09:12:50,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2024-11-18 09:12:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-18 09:12:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 09:12:50,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:50,303 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:50,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 09:12:50,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:50,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2024-11-18 09:12:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967915437] [2024-11-18 09:12:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:12:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:12:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:50,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967915437] [2024-11-18 09:12:50,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967915437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:12:50,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:12:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 09:12:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186391920] [2024-11-18 09:12:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:12:50,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 09:12:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 09:12:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:12:50,420 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2024-11-18 09:12:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:50,460 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-18 09:12:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 09:12:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-18 09:12:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:50,461 INFO L225 Difference]: With dead ends: 39 [2024-11-18 09:12:50,461 INFO L226 Difference]: Without dead ends: 23 [2024-11-18 09:12:50,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 09:12:50,463 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:50,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:12:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-18 09:12:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-18 09:12:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-18 09:12:50,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2024-11-18 09:12:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:50,468 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-18 09:12:50,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2024-11-18 09:12:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-18 09:12:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 09:12:50,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:50,469 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:50,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 09:12:50,470 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:50,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2024-11-18 09:12:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:50,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260314987] [2024-11-18 09:12:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:12:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:12:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:12:50,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:50,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260314987] [2024-11-18 09:12:50,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260314987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 09:12:50,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 09:12:50,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 09:12:50,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474726299] [2024-11-18 09:12:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 09:12:50,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 09:12:50,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 09:12:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:12:50,593 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:50,666 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-11-18 09:12:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 09:12:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-18 09:12:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:50,667 INFO L225 Difference]: With dead ends: 44 [2024-11-18 09:12:50,667 INFO L226 Difference]: Without dead ends: 31 [2024-11-18 09:12:50,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-18 09:12:50,668 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:50,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:12:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-18 09:12:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2024-11-18 09:12:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-18 09:12:50,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-11-18 09:12:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:50,678 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-18 09:12:50,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-18 09:12:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-18 09:12:50,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:50,683 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:50,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 09:12:50,683 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:50,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2024-11-18 09:12:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680750969] [2024-11-18 09:12:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:12:50,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:12:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:12:50,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680750969] [2024-11-18 09:12:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680750969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312313973] [2024-11-18 09:12:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 09:12:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:50,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:12:50,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 09:12:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:12:50,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:12:50,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:12:50,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:12:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:12:51,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312313973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:12:51,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:12:51,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 09:12:51,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089210811] [2024-11-18 09:12:51,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:12:51,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 09:12:51,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 09:12:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-18 09:12:51,014 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:51,065 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-18 09:12:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 09:12:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-18 09:12:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:51,068 INFO L225 Difference]: With dead ends: 49 [2024-11-18 09:12:51,068 INFO L226 Difference]: Without dead ends: 29 [2024-11-18 09:12:51,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-18 09:12:51,069 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:51,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 09:12:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-18 09:12:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-18 09:12:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-18 09:12:51,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2024-11-18 09:12:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:51,078 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-18 09:12:51,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-18 09:12:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 09:12:51,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:51,083 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:51,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 09:12:51,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:51,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:51,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2024-11-18 09:12:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:51,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358336374] [2024-11-18 09:12:51,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:12:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:51,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:12:51,326 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 09:12:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358336374] [2024-11-18 09:12:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358336374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437810434] [2024-11-18 09:12:51,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:12:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:51,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:51,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:12:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 09:12:51,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:12:51,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:51,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 09:12:51,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 09:12:51,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:12:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 09:12:51,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437810434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:12:51,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:12:51,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-18 09:12:51,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119441844] [2024-11-18 09:12:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:12:51,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 09:12:51,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 09:12:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-18 09:12:51,570 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:51,663 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-18 09:12:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 09:12:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-18 09:12:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:51,664 INFO L225 Difference]: With dead ends: 57 [2024-11-18 09:12:51,664 INFO L226 Difference]: Without dead ends: 41 [2024-11-18 09:12:51,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-11-18 09:12:51,668 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:51,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:12:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-18 09:12:51,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2024-11-18 09:12:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-18 09:12:51,674 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2024-11-18 09:12:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:51,674 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-18 09:12:51,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-18 09:12:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 09:12:51,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:51,676 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:51,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 09:12:51,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:51,880 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:51,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2024-11-18 09:12:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:51,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572581071] [2024-11-18 09:12:51,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:12:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:51,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:12:51,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572581071] [2024-11-18 09:12:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572581071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:53,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563370578] [2024-11-18 09:12:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:12:53,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:53,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:53,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:12:53,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 09:12:53,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 09:12:53,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:53,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-18 09:12:53,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:54,009 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 15 treesize of output 1 [2024-11-18 09:12:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:54,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:12:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 09:12:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563370578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:12:54,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:12:54,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13, 11] total 46 [2024-11-18 09:12:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010473607] [2024-11-18 09:12:54,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:12:54,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-18 09:12:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-18 09:12:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2024-11-18 09:12:54,613 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:55,617 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-11-18 09:12:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-18 09:12:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 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 35 [2024-11-18 09:12:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:55,618 INFO L225 Difference]: With dead ends: 65 [2024-11-18 09:12:55,618 INFO L226 Difference]: Without dead ends: 61 [2024-11-18 09:12:55,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2024-11-18 09:12:55,620 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:55,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 09:12:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-18 09:12:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-11-18 09:12:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-18 09:12:55,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2024-11-18 09:12:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:55,627 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-18 09:12:55,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-18 09:12:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 09:12:55,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:55,628 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:55,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 09:12:55,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:55,832 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:55,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:55,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2024-11-18 09:12:55,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:55,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73643673] [2024-11-18 09:12:55,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:12:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:55,841 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:12:55,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:12:55,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:55,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73643673] [2024-11-18 09:12:55,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73643673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:55,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741352642] [2024-11-18 09:12:55,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:12:55,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:55,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:55,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:12:55,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 09:12:55,958 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:12:55,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:55,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:12:55,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:12:56,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:12:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 09:12:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741352642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:12:56,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:12:56,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-18 09:12:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877378907] [2024-11-18 09:12:56,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:12:56,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 09:12:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:56,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 09:12:56,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:12:56,066 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:56,190 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-11-18 09:12:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 09:12:56,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-18 09:12:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:56,192 INFO L225 Difference]: With dead ends: 115 [2024-11-18 09:12:56,192 INFO L226 Difference]: Without dead ends: 67 [2024-11-18 09:12:56,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-18 09:12:56,193 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:56,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:12:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-18 09:12:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2024-11-18 09:12:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2024-11-18 09:12:56,199 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2024-11-18 09:12:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:56,199 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2024-11-18 09:12:56,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2024-11-18 09:12:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 09:12:56,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:56,200 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:56,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 09:12:56,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:56,401 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:56,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:56,401 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2024-11-18 09:12:56,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:56,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750464465] [2024-11-18 09:12:56,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:12:56,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:56,415 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-18 09:12:56,415 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 09:12:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:56,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750464465] [2024-11-18 09:12:56,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750464465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:56,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207247970] [2024-11-18 09:12:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:12:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:56,486 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) [2024-11-18 09:12:56,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 09:12:56,540 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-18 09:12:56,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:56,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 09:12:56,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 09:12:56,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:12:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 09:12:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207247970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:12:56,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:12:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-18 09:12:56,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131097620] [2024-11-18 09:12:56,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:12:56,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 09:12:56,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:12:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 09:12:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-18 09:12:56,671 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:12:56,806 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-18 09:12:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 09:12:56,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 39 [2024-11-18 09:12:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:12:56,807 INFO L225 Difference]: With dead ends: 66 [2024-11-18 09:12:56,807 INFO L226 Difference]: Without dead ends: 50 [2024-11-18 09:12:56,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-18 09:12:56,808 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:12:56,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 23 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:12:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-18 09:12:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-18 09:12:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-11-18 09:12:56,813 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2024-11-18 09:12:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:12:56,813 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-11-18 09:12:56,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:12:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-11-18 09:12:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 09:12:56,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:12:56,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:12:56,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 09:12:57,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:57,019 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:12:57,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:12:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2024-11-18 09:12:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:12:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002274281] [2024-11-18 09:12:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:12:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:12:57,053 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-18 09:12:57,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:12:59,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002274281] [2024-11-18 09:12:59,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002274281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:12:59,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754400704] [2024-11-18 09:12:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:12:59,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:12:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:12:59,038 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) [2024-11-18 09:12:59,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 09:12:59,108 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-18 09:12:59,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:12:59,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-18 09:12:59,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:12:59,176 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 15 treesize of output 1 [2024-11-18 09:12:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:12:59,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 09:13:00,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754400704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:00,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:00,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 18, 15] total 63 [2024-11-18 09:13:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993906337] [2024-11-18 09:13:00,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:00,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-18 09:13:00,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-18 09:13:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=3635, Unknown=0, NotChecked=0, Total=3906 [2024-11-18 09:13:00,252 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 63 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 63 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:01,611 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-11-18 09:13:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-18 09:13:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 63 states have internal predecessors, (116), 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 45 [2024-11-18 09:13:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:01,616 INFO L225 Difference]: With dead ends: 81 [2024-11-18 09:13:01,616 INFO L226 Difference]: Without dead ends: 77 [2024-11-18 09:13:01,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=500, Invalid=5980, Unknown=0, NotChecked=0, Total=6480 [2024-11-18 09:13:01,618 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:01,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 135 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-18 09:13:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-18 09:13:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2024-11-18 09:13:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-18 09:13:01,637 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2024-11-18 09:13:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:01,637 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-18 09:13:01,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 63 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-18 09:13:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-18 09:13:01,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:01,638 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:01,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 09:13:01,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:01,839 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:01,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2024-11-18 09:13:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:01,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163930304] [2024-11-18 09:13:01,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:13:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:13:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-18 09:13:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163930304] [2024-11-18 09:13:01,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163930304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:01,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714560923] [2024-11-18 09:13:01,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:13:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:01,981 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) [2024-11-18 09:13:01,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 09:13:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:13:02,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 09:13:02,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-18 09:13:02,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-18 09:13:02,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714560923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:02,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:02,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-18 09:13:02,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424899943] [2024-11-18 09:13:02,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:02,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 09:13:02,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 09:13:02,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-18 09:13:02,320 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:02,484 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2024-11-18 09:13:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 09:13:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 47 [2024-11-18 09:13:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:02,485 INFO L225 Difference]: With dead ends: 143 [2024-11-18 09:13:02,485 INFO L226 Difference]: Without dead ends: 81 [2024-11-18 09:13:02,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-18 09:13:02,486 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:02,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 27 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:13:02,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-18 09:13:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2024-11-18 09:13:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2024-11-18 09:13:02,498 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2024-11-18 09:13:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:02,498 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2024-11-18 09:13:02,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2024-11-18 09:13:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 09:13:02,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:02,500 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:02,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 09:13:02,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:02,701 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:02,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2024-11-18 09:13:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:02,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247399481] [2024-11-18 09:13:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:13:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:02,713 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:13:02,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-18 09:13:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247399481] [2024-11-18 09:13:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247399481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:02,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987469839] [2024-11-18 09:13:02,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:13:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:02,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:02,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 09:13:02,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:13:02,861 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:02,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 09:13:02,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-18 09:13:02,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-18 09:13:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987469839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:03,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-18 09:13:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539822994] [2024-11-18 09:13:03,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:03,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 09:13:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 09:13:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-18 09:13:03,010 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:03,187 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2024-11-18 09:13:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 09:13:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 49 [2024-11-18 09:13:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:03,189 INFO L225 Difference]: With dead ends: 80 [2024-11-18 09:13:03,189 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 09:13:03,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-11-18 09:13:03,189 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:03,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 32 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:13:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 09:13:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-11-18 09:13:03,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-18 09:13:03,194 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2024-11-18 09:13:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:03,195 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-18 09:13:03,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-18 09:13:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 09:13:03,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:03,196 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:03,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 09:13:03,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-18 09:13:03,400 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:03,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2024-11-18 09:13:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199906715] [2024-11-18 09:13:03,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:13:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:03,422 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:13:03,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:13:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199906715] [2024-11-18 09:13:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199906715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:05,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610270622] [2024-11-18 09:13:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:13:05,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:05,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:05,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 09:13:05,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 09:13:05,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:05,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-18 09:13:05,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:05,973 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 19 treesize of output 1 [2024-11-18 09:13:07,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:13:07,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:13:07,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 39 [2024-11-18 09:13:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 09:13:07,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 09:13:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610270622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:08,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:08,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 26, 21] total 84 [2024-11-18 09:13:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042513410] [2024-11-18 09:13:08,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:08,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-18 09:13:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:08,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-18 09:13:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=6564, Unknown=0, NotChecked=0, Total=6972 [2024-11-18 09:13:08,414 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 84 states, 84 states have (on average 1.75) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:11,237 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2024-11-18 09:13:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-18 09:13:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.75) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-18 09:13:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:11,238 INFO L225 Difference]: With dead ends: 96 [2024-11-18 09:13:11,238 INFO L226 Difference]: Without dead ends: 92 [2024-11-18 09:13:11,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3594 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=882, Invalid=11774, Unknown=0, NotChecked=0, Total=12656 [2024-11-18 09:13:11,241 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:11,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-18 09:13:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-18 09:13:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2024-11-18 09:13:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-18 09:13:11,260 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2024-11-18 09:13:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:11,260 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-18 09:13:11,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.75) internal successors, (147), 84 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-18 09:13:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-18 09:13:11,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:11,265 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:11,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 09:13:11,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:11,466 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:11,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2024-11-18 09:13:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:11,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021173339] [2024-11-18 09:13:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:13:11,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:11,475 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:13:11,476 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 09:13:11,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:11,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021173339] [2024-11-18 09:13:11,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021173339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:11,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217819964] [2024-11-18 09:13:11,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:13:11,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:11,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:11,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:11,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 09:13:11,643 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:13:11,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:11,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 09:13:11,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 09:13:11,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-18 09:13:11,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217819964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:11,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:11,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-18 09:13:11,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296880260] [2024-11-18 09:13:11,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:11,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 09:13:11,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 09:13:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-18 09:13:11,825 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:12,016 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2024-11-18 09:13:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 09:13:12,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 57 [2024-11-18 09:13:12,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:12,017 INFO L225 Difference]: With dead ends: 171 [2024-11-18 09:13:12,017 INFO L226 Difference]: Without dead ends: 95 [2024-11-18 09:13:12,017 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:13:12,018 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:12,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 37 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:13:12,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-18 09:13:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-11-18 09:13:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-11-18 09:13:12,028 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2024-11-18 09:13:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:12,029 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-11-18 09:13:12,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-11-18 09:13:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-18 09:13:12,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:12,030 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:12,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 09:13:12,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 09:13:12,234 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:12,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2024-11-18 09:13:12,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95046603] [2024-11-18 09:13:12,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:13:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:12,248 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 09:13:12,248 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 09:13:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95046603] [2024-11-18 09:13:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95046603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373224822] [2024-11-18 09:13:12,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:13:12,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:12,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:12,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:12,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 09:13:12,474 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 09:13:12,474 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:12,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 09:13:12,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 09:13:12,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 09:13:12,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373224822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:12,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:12,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-11-18 09:13:12,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840844220] [2024-11-18 09:13:12,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:12,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 09:13:12,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 09:13:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-18 09:13:12,733 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:12,966 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2024-11-18 09:13:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 09:13:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 59 [2024-11-18 09:13:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:12,967 INFO L225 Difference]: With dead ends: 94 [2024-11-18 09:13:12,967 INFO L226 Difference]: Without dead ends: 70 [2024-11-18 09:13:12,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 104 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=607, Unknown=0, NotChecked=0, Total=812 [2024-11-18 09:13:12,971 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:12,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 34 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 09:13:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-18 09:13:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-18 09:13:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-18 09:13:12,991 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2024-11-18 09:13:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-18 09:13:12,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-18 09:13:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-18 09:13:12,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:12,991 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:13,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 09:13:13,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 09:13:13,192 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:13,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2024-11-18 09:13:13,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:13,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861306016] [2024-11-18 09:13:13,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:13:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:13,234 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-18 09:13:13,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:13:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861306016] [2024-11-18 09:13:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861306016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282118053] [2024-11-18 09:13:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:13:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:16,236 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:16,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 09:13:16,301 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-18 09:13:16,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:16,303 WARN L253 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-18 09:13:16,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:16,400 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 19 treesize of output 1 [2024-11-18 09:13:18,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:13:18,944 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 15 treesize of output 14 [2024-11-18 09:13:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 09:13:19,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 09:13:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282118053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:22,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:22,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 52, 47] total 134 [2024-11-18 09:13:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349917323] [2024-11-18 09:13:22,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:22,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-18 09:13:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-18 09:13:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=16846, Unknown=0, NotChecked=0, Total=17822 [2024-11-18 09:13:22,993 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 134 states, 134 states have (on average 1.3134328358208955) internal successors, (176), 134 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:29,768 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2024-11-18 09:13:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-18 09:13:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.3134328358208955) internal successors, (176), 134 states have internal predecessors, (176), 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 65 [2024-11-18 09:13:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:29,772 INFO L225 Difference]: With dead ends: 118 [2024-11-18 09:13:29,772 INFO L226 Difference]: Without dead ends: 98 [2024-11-18 09:13:29,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9022 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2246, Invalid=33664, Unknown=0, NotChecked=0, Total=35910 [2024-11-18 09:13:29,781 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:29,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-18 09:13:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-18 09:13:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2024-11-18 09:13:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2024-11-18 09:13:29,801 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 65 [2024-11-18 09:13:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:29,801 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2024-11-18 09:13:29,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.3134328358208955) internal successors, (176), 134 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2024-11-18 09:13:29,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-18 09:13:29,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:29,803 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:29,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-18 09:13:30,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 09:13:30,008 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:30,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash 473178144, now seen corresponding path program 13 times [2024-11-18 09:13:30,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:30,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25953725] [2024-11-18 09:13:30,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:13:30,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:13:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-18 09:13:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25953725] [2024-11-18 09:13:30,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25953725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:30,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186037031] [2024-11-18 09:13:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 09:13:30,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:30,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:30,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 09:13:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 09:13:30,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 09:13:30,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-18 09:13:30,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-18 09:13:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186037031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:30,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:30,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-18 09:13:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061616789] [2024-11-18 09:13:30,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:30,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 09:13:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 09:13:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:13:30,514 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:30,764 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2024-11-18 09:13:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 09:13:30,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 67 [2024-11-18 09:13:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:30,765 INFO L225 Difference]: With dead ends: 187 [2024-11-18 09:13:30,765 INFO L226 Difference]: Without dead ends: 109 [2024-11-18 09:13:30,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-18 09:13:30,766 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:30,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 44 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:13:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-18 09:13:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2024-11-18 09:13:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-11-18 09:13:30,777 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2024-11-18 09:13:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:30,777 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-11-18 09:13:30,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-11-18 09:13:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-18 09:13:30,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:30,782 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:30,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-18 09:13:30,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-18 09:13:30,983 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:30,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2024-11-18 09:13:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895469428] [2024-11-18 09:13:30,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:13:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:31,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:13:31,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-18 09:13:31,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:31,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895469428] [2024-11-18 09:13:31,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895469428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369963272] [2024-11-18 09:13:31,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 09:13:31,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:31,172 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:31,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-18 09:13:31,238 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 09:13:31,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:31,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 09:13:31,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-18 09:13:31,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-18 09:13:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369963272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-18 09:13:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823737117] [2024-11-18 09:13:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:31,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 09:13:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 09:13:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-18 09:13:31,455 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:31,739 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2024-11-18 09:13:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 09:13:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 69 [2024-11-18 09:13:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:31,740 INFO L225 Difference]: With dead ends: 108 [2024-11-18 09:13:31,740 INFO L226 Difference]: Without dead ends: 80 [2024-11-18 09:13:31,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 09:13:31,741 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:31,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 37 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:13:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-18 09:13:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2024-11-18 09:13:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-11-18 09:13:31,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2024-11-18 09:13:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:31,748 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-11-18 09:13:31,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-11-18 09:13:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-18 09:13:31,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:31,749 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:31,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-18 09:13:31,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:31,950 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:31,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2024-11-18 09:13:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131795906] [2024-11-18 09:13:31,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:13:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:31,993 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 09:13:31,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:13:36,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131795906] [2024-11-18 09:13:36,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131795906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903418916] [2024-11-18 09:13:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 09:13:36,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:36,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:36,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:36,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-18 09:13:36,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-18 09:13:36,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:36,462 WARN L253 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-18 09:13:36,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:36,552 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 19 treesize of output 1 [2024-11-18 09:13:38,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:13:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:13:38,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:13:38,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:13:38,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 71 [2024-11-18 09:13:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 11 proven. 144 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-18 09:13:39,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-18 09:13:41,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903418916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:41,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:41,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 34, 29] total 122 [2024-11-18 09:13:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191882021] [2024-11-18 09:13:41,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:41,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-18 09:13:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-18 09:13:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=14061, Unknown=0, NotChecked=0, Total=14762 [2024-11-18 09:13:41,347 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 122 states, 122 states have (on average 1.6311475409836065) internal successors, (199), 122 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:52,543 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2024-11-18 09:13:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-18 09:13:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.6311475409836065) internal successors, (199), 122 states have internal predecessors, (199), 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 75 [2024-11-18 09:13:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:52,544 INFO L225 Difference]: With dead ends: 133 [2024-11-18 09:13:52,544 INFO L226 Difference]: Without dead ends: 129 [2024-11-18 09:13:52,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11267 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=2357, Invalid=39873, Unknown=0, NotChecked=0, Total=42230 [2024-11-18 09:13:52,546 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 5084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:52,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 187 Invalid, 5084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-18 09:13:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-18 09:13:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2024-11-18 09:13:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2024-11-18 09:13:52,565 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 75 [2024-11-18 09:13:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:52,565 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2024-11-18 09:13:52,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.6311475409836065) internal successors, (199), 122 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2024-11-18 09:13:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-18 09:13:52,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:52,565 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:52,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-18 09:13:52,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-18 09:13:52,766 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:52,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2024-11-18 09:13:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:52,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642820794] [2024-11-18 09:13:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:13:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:52,776 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:13:52,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-18 09:13:53,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:53,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642820794] [2024-11-18 09:13:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642820794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593924044] [2024-11-18 09:13:53,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 09:13:53,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:53,005 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:53,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-18 09:13:53,068 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 09:13:53,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:53,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 09:13:53,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-18 09:13:53,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-18 09:13:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593924044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:53,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-11-18 09:13:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567156672] [2024-11-18 09:13:53,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:53,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 09:13:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 09:13:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-11-18 09:13:53,582 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:53,837 INFO L93 Difference]: Finished difference Result 232 states and 249 transitions. [2024-11-18 09:13:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 09:13:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 77 [2024-11-18 09:13:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:53,838 INFO L225 Difference]: With dead ends: 232 [2024-11-18 09:13:53,839 INFO L226 Difference]: Without dead ends: 109 [2024-11-18 09:13:53,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2024-11-18 09:13:53,839 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 141 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:53,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 38 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:13:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-18 09:13:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2024-11-18 09:13:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2024-11-18 09:13:53,855 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 77 [2024-11-18 09:13:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:53,855 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2024-11-18 09:13:53,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2024-11-18 09:13:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-18 09:13:53,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:53,856 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:53,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-18 09:13:54,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:54,060 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:54,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1604288498, now seen corresponding path program 17 times [2024-11-18 09:13:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362900428] [2024-11-18 09:13:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:13:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:54,083 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 09:13:54,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-18 09:13:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:13:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362900428] [2024-11-18 09:13:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362900428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:13:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93224105] [2024-11-18 09:13:54,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 09:13:54,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:13:54,250 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:13:54,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-18 09:13:54,414 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-18 09:13:54,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:13:54,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 09:13:54,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:13:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-18 09:13:54,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:13:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2024-11-18 09:13:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93224105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:13:54,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:13:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-11-18 09:13:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152603114] [2024-11-18 09:13:54,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:13:54,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 09:13:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:13:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 09:13:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2024-11-18 09:13:54,688 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 09:13:54,991 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2024-11-18 09:13:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-18 09:13:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 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 81 [2024-11-18 09:13:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 09:13:54,992 INFO L225 Difference]: With dead ends: 108 [2024-11-18 09:13:54,992 INFO L226 Difference]: Without dead ends: 90 [2024-11-18 09:13:54,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 09:13:54,993 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 09:13:54,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 35 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 09:13:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-18 09:13:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-11-18 09:13:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-11-18 09:13:55,006 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 81 [2024-11-18 09:13:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 09:13:55,006 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-11-18 09:13:55,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 09:13:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-11-18 09:13:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-18 09:13:55,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 09:13:55,007 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 09:13:55,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-18 09:13:55,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:13:55,208 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 09:13:55,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 09:13:55,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2024-11-18 09:13:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 09:13:55,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686157591] [2024-11-18 09:13:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:13:55,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 09:13:55,240 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:13:55,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:14:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 12 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:14:01,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 09:14:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686157591] [2024-11-18 09:14:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686157591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 09:14:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427386066] [2024-11-18 09:14:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 09:14:01,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 09:14:01,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 09:14:01,546 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 09:14:01,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-18 09:14:01,631 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 09:14:01,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 09:14:01,634 WARN L253 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-18 09:14:01,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 09:14:01,982 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 15 treesize of output 1 [2024-11-18 09:14:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-18 09:14:05,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:14:05,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 72 treesize of output 135 [2024-11-18 09:14:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:14:06,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 09:14:11,540 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 100 treesize of output 84 [2024-11-18 09:14:11,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-18 09:14:11,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 923 treesize of output 475 [2024-11-18 09:14:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 09:14:12,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427386066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 09:14:12,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 09:14:12,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 54, 55] total 177 [2024-11-18 09:14:12,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367059062] [2024-11-18 09:14:12,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 09:14:12,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-11-18 09:14:12,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 09:14:12,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-11-18 09:14:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1527, Invalid=29625, Unknown=0, NotChecked=0, Total=31152 [2024-11-18 09:14:12,715 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 177 states, 177 states have (on average 1.3672316384180792) internal successors, (242), 177 states have internal predecessors, (242), 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)