./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_20x0-2.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/recursive-simple/sum_20x0-2.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 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:26:30,533 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:26:30,600 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:26:30,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:26:30,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:26:30,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:26:30,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:26:30,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:26:30,653 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:26:30,653 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:26:30,654 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:26:30,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:26:30,654 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:26:30,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:26:30,655 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:26:30,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:26:30,656 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:26:30,656 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:26:30,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:26:30,657 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:26:30,657 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:26:30,658 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:26:30,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:26:30,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:26:30,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:26:30,659 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:26:30,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:26:30,659 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:26:30,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:26:30,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:26:30,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:26:30,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:26:30,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:26:30,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:26:30,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:26:30,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:26:30,664 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:26:30,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:26:30,665 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:26:30,665 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:26:30,665 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:26:30,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:26:30,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2024-11-18 14:26:30,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:26:30,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:26:31,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:26:31,003 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:26:31,003 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:26:31,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-11-18 14:26:32,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:26:32,703 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:26:32,704 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-11-18 14:26:32,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236060db1/2fb37358068c4bc589a3914d7406373f/FLAG311db43f1 [2024-11-18 14:26:32,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236060db1/2fb37358068c4bc589a3914d7406373f [2024-11-18 14:26:32,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:26:32,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:26:32,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:26:32,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:26:32,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:26:32,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:32,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273cfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32, skipping insertion in model container [2024-11-18 14:26:32,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:32,759 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:26:32,959 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/recursive-simple/sum_20x0-2.c[481,494] [2024-11-18 14:26:32,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:26:32,973 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:26:32,983 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/recursive-simple/sum_20x0-2.c[481,494] [2024-11-18 14:26:32,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:26:32,996 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:26:32,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32 WrapperNode [2024-11-18 14:26:32,997 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:26:32,998 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:26:32,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:26:32,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:26:33,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,022 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-18 14:26:33,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:26:33,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:26:33,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:26:33,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:26:33,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,034 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,043 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-18 14:26:33,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,048 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:26:33,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:26:33,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:26:33,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:26:33,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (1/1) ... [2024-11-18 14:26:33,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:26:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:33,082 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 14:26:33,084 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 14:26:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:26:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:26:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:26:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-18 14:26:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-18 14:26:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:26:33,174 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:26:33,176 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:26:33,289 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-18 14:26:33,290 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:26:33,301 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:26:33,302 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:26:33,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:26:33 BoogieIcfgContainer [2024-11-18 14:26:33,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:26:33,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:26:33,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:26:33,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:26:33,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:26:32" (1/3) ... [2024-11-18 14:26:33,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0dc170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:26:33, skipping insertion in model container [2024-11-18 14:26:33,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:26:32" (2/3) ... [2024-11-18 14:26:33,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0dc170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:26:33, skipping insertion in model container [2024-11-18 14:26:33,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:26:33" (3/3) ... [2024-11-18 14:26:33,310 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2024-11-18 14:26:33,325 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:26:33,325 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:26:33,381 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:26:33,387 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;@3249453, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:26:33,387 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:26:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:26:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-18 14:26:33,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:33,396 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:33,396 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:33,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2024-11-18 14:26:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579853571] [2024-11-18 14:26:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:26:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:26:33,660 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 14:26:33,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:33,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579853571] [2024-11-18 14:26:33,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579853571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:26:33,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:26:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 14:26:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712564302] [2024-11-18 14:26:33,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:26:33,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 14:26:33,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 14:26:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:26:33,691 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:26:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:33,755 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-18 14:26:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 14:26:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-18 14:26:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:33,764 INFO L225 Difference]: With dead ends: 25 [2024-11-18 14:26:33,764 INFO L226 Difference]: Without dead ends: 15 [2024-11-18 14:26:33,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 14:26:33,769 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:33,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:26:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-18 14:26:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-18 14:26:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:26:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-18 14:26:33,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-18 14:26:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:33,799 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-18 14:26:33,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:26:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-18 14:26:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 14:26:33,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:33,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:33,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:26:33,801 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:33,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2024-11-18 14:26:33,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:33,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235699769] [2024-11-18 14:26:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:26:33,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:26:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:26:33,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235699769] [2024-11-18 14:26:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235699769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555062122] [2024-11-18 14:26:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:26:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:33,936 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 14:26:33,938 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 14:26:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:26:33,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:26:34,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:26:34,081 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 14:26:34,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555062122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:34,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-18 14:26:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066191113] [2024-11-18 14:26:34,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:34,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-18 14:26:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-18 14:26:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-18 14:26:34,314 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 14:26:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:34,368 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-11-18 14:26:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:26:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2024-11-18 14:26:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:34,370 INFO L225 Difference]: With dead ends: 22 [2024-11-18 14:26:34,370 INFO L226 Difference]: Without dead ends: 18 [2024-11-18 14:26:34,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:26:34,371 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:34,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:26:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-18 14:26:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-18 14:26:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-18 14:26:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-18 14:26:34,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2024-11-18 14:26:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:34,382 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-18 14:26:34,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 14:26:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-18 14:26:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-18 14:26:34,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:34,383 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:34,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:26:34,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:34,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:34,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2024-11-18 14:26:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698710665] [2024-11-18 14:26:34,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:26:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:34,610 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:26:34,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:26:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698710665] [2024-11-18 14:26:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698710665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:34,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504232448] [2024-11-18 14:26:34,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:26:34,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:34,764 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 14:26:34,766 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 14:26:34,840 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:26:34,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:34,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 14:26:34,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:26:34,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 14:26:35,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504232448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:35,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:35,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2024-11-18 14:26:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084779049] [2024-11-18 14:26:35,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:35,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:26:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:26:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:26:35,289 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 14:26:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:35,368 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-18 14:26:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 14:26:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 22 [2024-11-18 14:26:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:35,370 INFO L225 Difference]: With dead ends: 25 [2024-11-18 14:26:35,370 INFO L226 Difference]: Without dead ends: 21 [2024-11-18 14:26:35,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:26:35,371 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:35,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:26:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-18 14:26:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-18 14:26:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-18 14:26:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-18 14:26:35,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2024-11-18 14:26:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:35,378 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-18 14:26:35,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 14:26:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-18 14:26:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 14:26:35,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:35,380 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:35,397 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 14:26:35,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-18 14:26:35,581 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:35,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2024-11-18 14:26:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261581235] [2024-11-18 14:26:35,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:26:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:35,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:26:35,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 14:26:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261581235] [2024-11-18 14:26:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261581235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160760179] [2024-11-18 14:26:35,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:26:35,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:35,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:35,824 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 14:26:35,825 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 14:26:35,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:26:35,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:35,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 14:26:35,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 14:26:35,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:26:36,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160760179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:36,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:36,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 15 [2024-11-18 14:26:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983285953] [2024-11-18 14:26:36,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:36,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:26:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:26:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:26:36,521 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 12 states have (on average 2.25) internal successors, (27), 15 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:26:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:36,652 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-18 14:26:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:26:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 15 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 28 [2024-11-18 14:26:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:36,654 INFO L225 Difference]: With dead ends: 28 [2024-11-18 14:26:36,654 INFO L226 Difference]: Without dead ends: 24 [2024-11-18 14:26:36,655 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:26:36,656 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:36,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-18 14:26:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-18 14:26:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-18 14:26:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-18 14:26:36,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2024-11-18 14:26:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:36,668 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-18 14:26:36,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.25) internal successors, (27), 15 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-18 14:26:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-18 14:26:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 14:26:36,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:36,670 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:36,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:26:36,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:36,874 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:36,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2024-11-18 14:26:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:36,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571476973] [2024-11-18 14:26:36,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:26:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:36,892 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:26:36,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-18 14:26:37,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:37,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571476973] [2024-11-18 14:26:37,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571476973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:37,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099957498] [2024-11-18 14:26:37,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:26:37,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:37,062 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 14:26:37,065 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 14:26:37,123 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:26:37,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:37,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-18 14:26:37,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-18 14:26:37,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 14:26:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099957498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:37,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:37,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 16 [2024-11-18 14:26:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383203942] [2024-11-18 14:26:37,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:37,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 14:26:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 14:26:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-18 14:26:37,974 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-18 14:26:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:38,066 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-18 14:26:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-18 14:26:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-11-18 14:26:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:38,067 INFO L225 Difference]: With dead ends: 31 [2024-11-18 14:26:38,067 INFO L226 Difference]: Without dead ends: 27 [2024-11-18 14:26:38,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-18 14:26:38,068 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:38,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 67 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-18 14:26:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-18 14:26:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-18 14:26:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-18 14:26:38,079 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2024-11-18 14:26:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:38,080 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-18 14:26:38,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-18 14:26:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-18 14:26:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 14:26:38,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:38,083 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:38,099 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 14:26:38,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:38,284 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:38,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2024-11-18 14:26:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234618277] [2024-11-18 14:26:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:26:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:38,299 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 14:26:38,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:26:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234618277] [2024-11-18 14:26:38,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234618277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:38,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785214934] [2024-11-18 14:26:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:26:38,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:38,442 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 14:26:38,443 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 14:26:38,512 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-18 14:26:38,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:38,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-18 14:26:38,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-18 14:26:38,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-18 14:26:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785214934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:39,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-18 14:26:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394421634] [2024-11-18 14:26:39,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:39,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 14:26:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 14:26:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-18 14:26:39,615 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-18 14:26:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:39,723 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-18 14:26:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:26:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 40 [2024-11-18 14:26:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:39,724 INFO L225 Difference]: With dead ends: 34 [2024-11-18 14:26:39,725 INFO L226 Difference]: Without dead ends: 30 [2024-11-18 14:26:39,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:26:39,726 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:39,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-18 14:26:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-18 14:26:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-18 14:26:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-18 14:26:39,731 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2024-11-18 14:26:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:39,732 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-18 14:26:39,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-18 14:26:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-18 14:26:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-18 14:26:39,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:39,733 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:39,749 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 14:26:39,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:39,938 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:39,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2024-11-18 14:26:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538447316] [2024-11-18 14:26:39,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:26:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:39,956 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:26:39,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 63 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-18 14:26:40,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538447316] [2024-11-18 14:26:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538447316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:40,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232631278] [2024-11-18 14:26:40,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:26:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:40,194 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 14:26:40,195 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 14:26:40,273 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:26:40,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:40,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-18 14:26:40,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-18 14:26:40,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-18 14:26:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232631278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:41,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17] total 21 [2024-11-18 14:26:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324909542] [2024-11-18 14:26:41,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:41,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:26:41,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:26:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:26:41,723 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-18 14:26:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:41,882 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-18 14:26:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:26:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) Word has length 46 [2024-11-18 14:26:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:41,884 INFO L225 Difference]: With dead ends: 37 [2024-11-18 14:26:41,884 INFO L226 Difference]: Without dead ends: 33 [2024-11-18 14:26:41,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:26:41,885 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:41,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 76 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-18 14:26:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-18 14:26:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-18 14:26:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-18 14:26:41,895 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2024-11-18 14:26:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:41,895 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-18 14:26:41,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-18 14:26:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-18 14:26:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-18 14:26:41,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:41,897 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:41,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:26:42,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:42,097 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:42,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2024-11-18 14:26:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:42,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836111192] [2024-11-18 14:26:42,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:26:42,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:26:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-18 14:26:42,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:42,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836111192] [2024-11-18 14:26:42,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836111192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:42,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488955005] [2024-11-18 14:26:42,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:26:42,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:42,280 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 14:26:42,282 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 14:26:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:26:42,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-18 14:26:42,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-18 14:26:42,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-18 14:26:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488955005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:44,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:44,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2024-11-18 14:26:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280476849] [2024-11-18 14:26:44,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:44,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:26:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:44,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:26:44,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:26:44,546 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-18 14:26:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:44,635 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-18 14:26:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:26:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 52 [2024-11-18 14:26:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:44,637 INFO L225 Difference]: With dead ends: 40 [2024-11-18 14:26:44,637 INFO L226 Difference]: Without dead ends: 36 [2024-11-18 14:26:44,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:26:44,638 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:44,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:26:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-18 14:26:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-18 14:26:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-18 14:26:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-18 14:26:44,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2024-11-18 14:26:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:44,645 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-18 14:26:44,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-18 14:26:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-18 14:26:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-18 14:26:44,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:44,648 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:44,667 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 14:26:44,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:44,849 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:44,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2024-11-18 14:26:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320033207] [2024-11-18 14:26:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:26:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:44,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:26:44,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-18 14:26:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320033207] [2024-11-18 14:26:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320033207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246120717] [2024-11-18 14:26:45,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:26:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:45,101 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 14:26:45,103 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 14:26:45,226 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:26:45,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:45,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 14:26:45,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 14:26:45,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-18 14:26:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246120717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:47,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 24 [2024-11-18 14:26:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060314659] [2024-11-18 14:26:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:47,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 14:26:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 14:26:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:26:47,819 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-18 14:26:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:47,954 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-11-18 14:26:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:26:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 58 [2024-11-18 14:26:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:47,957 INFO L225 Difference]: With dead ends: 43 [2024-11-18 14:26:47,957 INFO L226 Difference]: Without dead ends: 39 [2024-11-18 14:26:47,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:26:47,958 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:47,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 77 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-18 14:26:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-18 14:26:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-18 14:26:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-11-18 14:26:47,970 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2024-11-18 14:26:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:47,970 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-11-18 14:26:47,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-18 14:26:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-11-18 14:26:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-18 14:26:47,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:47,971 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:47,992 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 14:26:48,171 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,SelfDestructingSolverStorable8 [2024-11-18 14:26:48,172 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:48,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2024-11-18 14:26:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:48,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698447732] [2024-11-18 14:26:48,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:26:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:48,192 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-18 14:26:48,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 8 proven. 135 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-18 14:26:48,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:48,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698447732] [2024-11-18 14:26:48,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698447732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:48,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875951953] [2024-11-18 14:26:48,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:26:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:48,480 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 14:26:48,482 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 14:26:48,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-18 14:26:48,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:48,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-18 14:26:48,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-18 14:26:48,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-18 14:26:52,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875951953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:52,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:52,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 23] total 27 [2024-11-18 14:26:52,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391503848] [2024-11-18 14:26:52,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:52,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 14:26:52,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 14:26:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:26:52,094 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-18 14:26:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:52,309 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-11-18 14:26:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:26:52,309 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) Word has length 64 [2024-11-18 14:26:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:52,310 INFO L225 Difference]: With dead ends: 46 [2024-11-18 14:26:52,310 INFO L226 Difference]: Without dead ends: 42 [2024-11-18 14:26:52,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:26:52,311 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:52,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 84 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-18 14:26:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-18 14:26:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-18 14:26:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-18 14:26:52,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2024-11-18 14:26:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:52,322 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-18 14:26:52,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-18 14:26:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-18 14:26:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-18 14:26:52,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:52,326 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:52,342 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 14:26:52,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:26:52,531 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:52,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2024-11-18 14:26:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:52,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212115316] [2024-11-18 14:26:52,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:26:52,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:52,549 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:26:52,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-18 14:26:52,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:52,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212115316] [2024-11-18 14:26:52,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212115316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:52,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261555968] [2024-11-18 14:26:52,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:26:52,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:52,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:52,870 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 14:26:52,871 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 14:26:53,058 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:26:53,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:53,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-18 14:26:53,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-18 14:26:53,124 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:26:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-18 14:26:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261555968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:26:57,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:26:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 28 [2024-11-18 14:26:57,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494616340] [2024-11-18 14:26:57,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:26:57,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:26:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:26:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:26:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:26:57,549 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-18 14:26:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:26:57,680 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-11-18 14:26:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:26:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 70 [2024-11-18 14:26:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:26:57,682 INFO L225 Difference]: With dead ends: 49 [2024-11-18 14:26:57,682 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 14:26:57,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:26:57,683 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:26:57,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:26:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 14:26:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-18 14:26:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-18 14:26:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-18 14:26:57,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-11-18 14:26:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:26:57,688 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-18 14:26:57,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-18 14:26:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-18 14:26:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-18 14:26:57,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:26:57,689 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:26:57,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 14:26:57,890 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,SelfDestructingSolverStorable10 [2024-11-18 14:26:57,890 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:26:57,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:26:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2024-11-18 14:26:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:26:57,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933972246] [2024-11-18 14:26:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:26:57,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:26:57,906 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-18 14:26:57,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-18 14:26:58,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:26:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933972246] [2024-11-18 14:26:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933972246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:26:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100244566] [2024-11-18 14:26:58,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:26:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:26:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:26:58,191 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 14:26:58,203 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 14:26:58,541 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-18 14:26:58,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:26:58,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 14:26:58,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:26:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-18 14:26:58,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:27:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-18 14:27:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100244566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:27:04,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:27:04,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2024-11-18 14:27:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644933760] [2024-11-18 14:27:04,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:27:04,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-18 14:27:04,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:27:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-18 14:27:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:27:04,300 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-18 14:27:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:27:04,456 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-11-18 14:27:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:27:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 76 [2024-11-18 14:27:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:27:04,457 INFO L225 Difference]: With dead ends: 52 [2024-11-18 14:27:04,457 INFO L226 Difference]: Without dead ends: 48 [2024-11-18 14:27:04,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 138 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:27:04,458 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:27:04,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:27:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-18 14:27:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-18 14:27:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-18 14:27:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-18 14:27:04,465 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2024-11-18 14:27:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:27:04,465 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-18 14:27:04,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-18 14:27:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-18 14:27:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-18 14:27:04,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:27:04,466 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:27:04,480 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 14:27:04,667 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,SelfDestructingSolverStorable11 [2024-11-18 14:27:04,667 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:27:04,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:27:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2024-11-18 14:27:04,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:27:04,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096566826] [2024-11-18 14:27:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:27:04,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:27:04,694 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-18 14:27:04,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 11 proven. 234 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2024-11-18 14:27:05,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:27:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096566826] [2024-11-18 14:27:05,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096566826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:27:05,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146345414] [2024-11-18 14:27:05,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:27:05,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:27:05,045 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 14:27:05,046 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 14:27:05,445 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-18 14:27:05,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:05,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 14:27:05,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:27:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-18 14:27:05,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:27:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-18 14:27:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146345414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:27:13,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:27:13,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 33 [2024-11-18 14:27:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232474025] [2024-11-18 14:27:13,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:27:13,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-18 14:27:13,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:27:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-18 14:27:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 14:27:13,087 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2024-11-18 14:27:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:27:13,428 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-18 14:27:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:27:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 82 [2024-11-18 14:27:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:27:13,430 INFO L225 Difference]: With dead ends: 55 [2024-11-18 14:27:13,430 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 14:27:13,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1469, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 14:27:13,431 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 191 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:27:13,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 101 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:27:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 14:27:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-18 14:27:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-18 14:27:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-18 14:27:13,442 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2024-11-18 14:27:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:27:13,442 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-18 14:27:13,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2024-11-18 14:27:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-18 14:27:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-18 14:27:13,443 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:27:13,443 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:27:13,463 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 14:27:13,644 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,SelfDestructingSolverStorable12 [2024-11-18 14:27:13,644 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:27:13,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:27:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2024-11-18 14:27:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:27:13,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188883461] [2024-11-18 14:27:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:27:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:27:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:27:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-18 14:27:13,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:27:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188883461] [2024-11-18 14:27:13,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188883461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:27:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14906005] [2024-11-18 14:27:13,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:27:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:27:13,977 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 14:27:13,978 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 14:27:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:27:14,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-18 14:27:14,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:27:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-18 14:27:14,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:27:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-18 14:27:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14906005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:27:23,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:27:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2024-11-18 14:27:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311101836] [2024-11-18 14:27:23,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:27:23,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-18 14:27:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:27:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-18 14:27:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 14:27:23,799 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-18 14:27:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:27:23,982 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-11-18 14:27:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:27:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) Word has length 88 [2024-11-18 14:27:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:27:23,984 INFO L225 Difference]: With dead ends: 58 [2024-11-18 14:27:23,984 INFO L226 Difference]: Without dead ends: 54 [2024-11-18 14:27:23,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 160 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=664, Invalid=1406, Unknown=0, NotChecked=0, Total=2070 [2024-11-18 14:27:23,986 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:27:23,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 102 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:27:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-18 14:27:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-18 14:27:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-18 14:27:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-11-18 14:27:23,993 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2024-11-18 14:27:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:27:23,994 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-11-18 14:27:23,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-18 14:27:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-11-18 14:27:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-18 14:27:23,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:27:23,995 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:27:24,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-18 14:27:24,195 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,SelfDestructingSolverStorable13 [2024-11-18 14:27:24,195 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:27:24,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:27:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2024-11-18 14:27:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:27:24,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004855189] [2024-11-18 14:27:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:27:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:27:24,233 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:27:24,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 14 proven. 301 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-18 14:27:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:27:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004855189] [2024-11-18 14:27:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004855189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:27:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001220972] [2024-11-18 14:27:24,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:27:24,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:27:24,573 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 14:27:24,574 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 14:27:25,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:27:25,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:25,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-18 14:27:25,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:27:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-18 14:27:25,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:27:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-18 14:27:36,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001220972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:27:36,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:27:36,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 36 [2024-11-18 14:27:36,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070092685] [2024-11-18 14:27:36,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:27:36,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-18 14:27:36,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:27:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-18 14:27:36,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-11-18 14:27:36,582 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 36 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2024-11-18 14:27:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:27:36,823 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-18 14:27:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:27:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 36 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) Word has length 94 [2024-11-18 14:27:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:27:36,824 INFO L225 Difference]: With dead ends: 61 [2024-11-18 14:27:36,824 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:27:36,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 170 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 14:27:36,827 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:27:36,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 128 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:27:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:27:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-18 14:27:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-18 14:27:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-18 14:27:36,839 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2024-11-18 14:27:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:27:36,840 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-18 14:27:36,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 36 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (30), 15 states have call predecessors, (30), 17 states have call successors, (30) [2024-11-18 14:27:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-18 14:27:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-18 14:27:36,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:27:36,841 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:27:36,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-18 14:27:37,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:37,042 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:27:37,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:27:37,042 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2024-11-18 14:27:37,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:27:37,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141817268] [2024-11-18 14:27:37,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:27:37,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:27:37,075 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-18 14:27:37,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 14 proven. 360 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-18 14:27:37,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:27:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141817268] [2024-11-18 14:27:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141817268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:27:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625688491] [2024-11-18 14:27:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:27:37,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:27:37,526 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 14:27:37,528 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 14:27:38,193 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-18 14:27:38,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:38,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-18 14:27:38,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:27:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-18 14:27:38,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:27:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-18 14:27:52,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625688491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:27:52,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:27:52,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 35] total 39 [2024-11-18 14:27:52,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625310673] [2024-11-18 14:27:52,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:27:52,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-18 14:27:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:27:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-18 14:27:52,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 14:27:52,675 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 39 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (33), 16 states have call predecessors, (33), 19 states have call successors, (33) [2024-11-18 14:27:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:27:53,020 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-11-18 14:27:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-18 14:27:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 39 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (33), 16 states have call predecessors, (33), 19 states have call successors, (33) Word has length 100 [2024-11-18 14:27:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:27:53,021 INFO L225 Difference]: With dead ends: 64 [2024-11-18 14:27:53,021 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 14:27:53,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 18 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=993, Invalid=2087, Unknown=0, NotChecked=0, Total=3080 [2024-11-18 14:27:53,022 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 121 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:27:53,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 127 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:27:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 14:27:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-18 14:27:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-18 14:27:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-18 14:27:53,029 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2024-11-18 14:27:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:27:53,029 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-18 14:27:53,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 39 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (33), 16 states have call predecessors, (33), 19 states have call successors, (33) [2024-11-18 14:27:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-18 14:27:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-18 14:27:53,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:27:53,030 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:27:53,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-18 14:27:53,231 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,SelfDestructingSolverStorable15 [2024-11-18 14:27:53,231 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:27:53,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:27:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2024-11-18 14:27:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:27:53,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739264850] [2024-11-18 14:27:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:27:53,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:27:53,259 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:27:53,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2024-11-18 14:27:53,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:27:53,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739264850] [2024-11-18 14:27:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739264850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:27:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099509357] [2024-11-18 14:27:53,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:27:53,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:27:53,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:27:53,703 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 14:27:53,704 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 14:27:54,517 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:27:54,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:27:54,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-18 14:27:54,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:27:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-18 14:27:54,607 INFO L311 TraceCheckSpWp]: Computing backward predicates...