./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_25x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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_25x0-1.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 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 23:23:26,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 23:23:26,785 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 23:23:26,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 23:23:26,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 23:23:26,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 23:23:26,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 23:23:26,828 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 23:23:26,829 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 23:23:26,831 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 23:23:26,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 23:23:26,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 23:23:26,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 23:23:26,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 23:23:26,834 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 23:23:26,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 23:23:26,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 23:23:26,835 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 23:23:26,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 23:23:26,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 23:23:26,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 23:23:26,837 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 23:23:26,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 23:23:26,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 23:23:26,838 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 23:23:26,838 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 23:23:26,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 23:23:26,838 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 23:23:26,839 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 23:23:26,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 23:23:26,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 23:23:26,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 23:23:26,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:23:26,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 23:23:26,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 23:23:26,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 23:23:26,841 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 23:23:26,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 23:23:26,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 23:23:26,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 23:23:26,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 23:23:26,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 23:23:26,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 [2024-11-09 23:23:27,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 23:23:27,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 23:23:27,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 23:23:27,136 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 23:23:27,137 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 23:23:27,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-11-09 23:23:28,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 23:23:28,733 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 23:23:28,735 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-11-09 23:23:28,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08e991e9d/9887e6210426430fbfac56ed7b4e0166/FLAGa902963b2 [2024-11-09 23:23:29,132 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08e991e9d/9887e6210426430fbfac56ed7b4e0166 [2024-11-09 23:23:29,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 23:23:29,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 23:23:29,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 23:23:29,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 23:23:29,145 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 23:23:29,146 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e22781f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29, skipping insertion in model container [2024-11-09 23:23:29,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 23:23:29,322 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_25x0-1.c[481,494] [2024-11-09 23:23:29,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:23:29,339 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 23:23:29,352 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_25x0-1.c[481,494] [2024-11-09 23:23:29,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:23:29,380 INFO L204 MainTranslator]: Completed translation [2024-11-09 23:23:29,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29 WrapperNode [2024-11-09 23:23:29,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 23:23:29,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 23:23:29,382 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 23:23:29,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 23:23:29,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,409 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-09 23:23:29,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 23:23:29,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 23:23:29,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 23:23:29,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 23:23:29,421 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,433 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]. [2024-11-09 23:23:29,433 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,439 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,440 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,442 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 23:23:29,444 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 23:23:29,444 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 23:23:29,444 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 23:23:29,445 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (1/1) ... [2024-11-09 23:23:29,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:23:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:29,480 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) [2024-11-09 23:23:29,482 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 [2024-11-09 23:23:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 23:23:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 23:23:29,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 23:23:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-09 23:23:29,522 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-09 23:23:29,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 23:23:29,578 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 23:23:29,580 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 23:23:29,684 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L9: havoc #t~ret4; [2024-11-09 23:23:29,691 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-09 23:23:29,692 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 23:23:29,702 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 23:23:29,702 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 23:23:29,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:23:29 BoogieIcfgContainer [2024-11-09 23:23:29,703 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 23:23:29,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 23:23:29,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 23:23:29,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 23:23:29,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 11:23:29" (1/3) ... [2024-11-09 23:23:29,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d020842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:23:29, skipping insertion in model container [2024-11-09 23:23:29,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:23:29" (2/3) ... [2024-11-09 23:23:29,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d020842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:23:29, skipping insertion in model container [2024-11-09 23:23:29,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:23:29" (3/3) ... [2024-11-09 23:23:29,718 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2024-11-09 23:23:29,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 23:23:29,735 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 23:23:29,792 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 23:23:29,797 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;@2db2b50e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 23:23:29,798 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 23:23:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2024-11-09 23:23:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 23:23:29,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:29,806 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:29,807 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:29,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -253956851, now seen corresponding path program 1 times [2024-11-09 23:23:29,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627444357] [2024-11-09 23:23:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 23:23:30,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:30,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627444357] [2024-11-09 23:23:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627444357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:23:30,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:23:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 23:23:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022910600] [2024-11-09 23:23:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:23:30,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 23:23:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 23:23:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 23:23:30,177 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-11-09 23:23:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:30,247 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-09 23:23:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 23:23:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 11 [2024-11-09 23:23:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:30,257 INFO L225 Difference]: With dead ends: 28 [2024-11-09 23:23:30,258 INFO L226 Difference]: Without dead ends: 16 [2024-11-09 23:23:30,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 23:23:30,264 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:30,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:23:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-09 23:23:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-09 23:23:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 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) [2024-11-09 23:23:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-09 23:23:30,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-09 23:23:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:30,292 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-09 23:23:30,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-11-09 23:23:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-09 23:23:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 23:23:30,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:30,295 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:30,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 23:23:30,295 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:30,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1018036117, now seen corresponding path program 1 times [2024-11-09 23:23:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491494874] [2024-11-09 23:23:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:30,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 23:23:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:30,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491494874] [2024-11-09 23:23:30,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491494874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:30,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648771339] [2024-11-09 23:23:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:30,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:30,529 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) [2024-11-09 23:23:30,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 23:23:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:30,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 23:23:30,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 23:23:30,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 23:23:30,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648771339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:30,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-09 23:23:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668088982] [2024-11-09 23:23:30,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:30,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 23:23:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 23:23:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-09 23:23:30,873 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:23:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:30,920 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-09 23:23:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 23:23:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 17 [2024-11-09 23:23:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:30,923 INFO L225 Difference]: With dead ends: 24 [2024-11-09 23:23:30,923 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 23:23:30,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 23:23:30,925 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:30,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 23:23:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-09 23:23:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 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) [2024-11-09 23:23:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-09 23:23:30,934 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2024-11-09 23:23:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:30,935 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-09 23:23:30,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:23:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-09 23:23:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 23:23:30,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:30,938 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:30,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:31,141 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 [2024-11-09 23:23:31,142 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:31,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash -94460851, now seen corresponding path program 2 times [2024-11-09 23:23:31,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221119703] [2024-11-09 23:23:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:31,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:31,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:31,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:31,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 23:23:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221119703] [2024-11-09 23:23:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221119703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779238640] [2024-11-09 23:23:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:23:31,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:31,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:31,414 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) [2024-11-09 23:23:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 23:23:31,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:23:31,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:31,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 23:23:31,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 23:23:31,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 23:23:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779238640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:31,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:31,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-11-09 23:23:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569987882] [2024-11-09 23:23:31,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:31,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 23:23:31,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:31,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 23:23:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-09 23:23:31,893 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 23:23:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:31,964 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-11-09 23:23:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 23:23:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2024-11-09 23:23:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:31,966 INFO L225 Difference]: With dead ends: 27 [2024-11-09 23:23:31,966 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 23:23:31,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-09 23:23:31,967 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:31,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 23:23:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 23:23:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 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) [2024-11-09 23:23:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-09 23:23:31,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 23 [2024-11-09 23:23:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:31,973 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-09 23:23:31,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-09 23:23:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-09 23:23:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 23:23:31,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:31,975 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:31,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:32,178 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 [2024-11-09 23:23:32,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:32,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:32,179 INFO L85 PathProgramCache]: Analyzing trace with hash -472860373, now seen corresponding path program 3 times [2024-11-09 23:23:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:32,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671914202] [2024-11-09 23:23:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:32,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:32,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:32,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:32,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:32,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 23:23:32,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:32,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671914202] [2024-11-09 23:23:32,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671914202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:32,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447382257] [2024-11-09 23:23:32,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 23:23:32,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:32,401 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) [2024-11-09 23:23:32,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 23:23:32,447 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 23:23:32,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:32,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 23:23:32,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 23:23:32,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 23:23:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447382257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:32,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-11-09 23:23:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250704853] [2024-11-09 23:23:32,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:32,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 23:23:32,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 23:23:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-09 23:23:32,980 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 23:23:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:33,043 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-11-09 23:23:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 23:23:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 29 [2024-11-09 23:23:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:33,044 INFO L225 Difference]: With dead ends: 30 [2024-11-09 23:23:33,044 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 23:23:33,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-11-09 23:23:33,046 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:33,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 23:23:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 23:23:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 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) [2024-11-09 23:23:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-09 23:23:33,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2024-11-09 23:23:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:33,055 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-09 23:23:33,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 23:23:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-09 23:23:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 23:23:33,056 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:33,056 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:33,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:33,260 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 [2024-11-09 23:23:33,261 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:33,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1015344013, now seen corresponding path program 4 times [2024-11-09 23:23:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075306280] [2024-11-09 23:23:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 23:23:33,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075306280] [2024-11-09 23:23:33,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075306280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138856287] [2024-11-09 23:23:33,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 23:23:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:33,479 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) [2024-11-09 23:23:33,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 23:23:33,538 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 23:23:33,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:33,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 23:23:33,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 23:23:33,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 23:23:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138856287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:34,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-11-09 23:23:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805860307] [2024-11-09 23:23:34,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:34,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 23:23:34,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 23:23:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-09 23:23:34,315 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-09 23:23:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:34,380 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-09 23:23:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 23:23:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 35 [2024-11-09 23:23:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:34,381 INFO L225 Difference]: With dead ends: 33 [2024-11-09 23:23:34,381 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 23:23:34,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-09 23:23:34,383 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:34,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 23:23:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 23:23:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 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) [2024-11-09 23:23:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-09 23:23:34,393 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 35 [2024-11-09 23:23:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:34,393 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-09 23:23:34,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-09 23:23:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-09 23:23:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 23:23:34,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:34,394 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:34,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 23:23:34,595 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 [2024-11-09 23:23:34,595 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:34,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash -598941205, now seen corresponding path program 5 times [2024-11-09 23:23:34,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:34,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880248253] [2024-11-09 23:23:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:34,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 23:23:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880248253] [2024-11-09 23:23:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880248253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104826895] [2024-11-09 23:23:34,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 23:23:34,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:34,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:34,946 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) [2024-11-09 23:23:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 23:23:35,009 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-09 23:23:35,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:35,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 23:23:35,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 23:23:35,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 23:23:36,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104826895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:36,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:36,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-11-09 23:23:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083658298] [2024-11-09 23:23:36,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:36,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 23:23:36,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 23:23:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-09 23:23:36,136 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-09 23:23:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:36,221 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-09 23:23:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 23:23:36,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 41 [2024-11-09 23:23:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:36,222 INFO L225 Difference]: With dead ends: 36 [2024-11-09 23:23:36,222 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 23:23:36,222 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-09 23:23:36,223 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:36,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 76 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:23:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 23:23:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 23:23:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 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) [2024-11-09 23:23:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-11-09 23:23:36,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2024-11-09 23:23:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:36,232 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-11-09 23:23:36,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 18 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-09 23:23:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-11-09 23:23:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 23:23:36,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:36,234 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:36,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:36,438 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 [2024-11-09 23:23:36,439 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:36,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -853294387, now seen corresponding path program 6 times [2024-11-09 23:23:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:36,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790154404] [2024-11-09 23:23:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:36,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 23:23:36,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790154404] [2024-11-09 23:23:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790154404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117231515] [2024-11-09 23:23:36,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 23:23:36,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:36,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:36,782 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) [2024-11-09 23:23:36,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 23:23:36,857 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-09 23:23:36,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:36,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 23:23:36,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-09 23:23:36,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 23:23:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117231515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:38,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-11-09 23:23:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535685526] [2024-11-09 23:23:38,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:38,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 23:23:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 23:23:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-11-09 23:23:38,332 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-09 23:23:38,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:38,420 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-11-09 23:23:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 23:23:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 47 [2024-11-09 23:23:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:38,422 INFO L225 Difference]: With dead ends: 39 [2024-11-09 23:23:38,422 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 23:23:38,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-11-09 23:23:38,423 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:38,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 23:23:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 23:23:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 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) [2024-11-09 23:23:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-09 23:23:38,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 47 [2024-11-09 23:23:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:38,434 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-09 23:23:38,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 20 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-11-09 23:23:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-09 23:23:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 23:23:38,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:38,435 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:38,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:38,639 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 [2024-11-09 23:23:38,640 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:38,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:38,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1267565909, now seen corresponding path program 7 times [2024-11-09 23:23:38,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695300036] [2024-11-09 23:23:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:38,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:38,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:39,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:39,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 23:23:39,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:39,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695300036] [2024-11-09 23:23:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695300036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281196387] [2024-11-09 23:23:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 23:23:39,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:39,050 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) [2024-11-09 23:23:39,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 23:23:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:39,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 23:23:39,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-09 23:23:39,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 23:23:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281196387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:40,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-11-09 23:23:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936503433] [2024-11-09 23:23:40,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:40,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 23:23:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 23:23:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-09 23:23:40,967 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-09 23:23:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:41,062 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-09 23:23:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 23:23:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 53 [2024-11-09 23:23:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:41,064 INFO L225 Difference]: With dead ends: 42 [2024-11-09 23:23:41,064 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 23:23:41,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-11-09 23:23:41,065 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:41,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:23:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 23:23:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 23:23:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 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) [2024-11-09 23:23:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-11-09 23:23:41,070 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 53 [2024-11-09 23:23:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:41,070 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-11-09 23:23:41,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-09 23:23:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-11-09 23:23:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 23:23:41,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:41,072 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:41,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:41,276 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 [2024-11-09 23:23:41,277 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:41,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash -753980915, now seen corresponding path program 8 times [2024-11-09 23:23:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205245650] [2024-11-09 23:23:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,727 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 23:23:41,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:41,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205245650] [2024-11-09 23:23:41,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205245650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:41,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643418325] [2024-11-09 23:23:41,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:23:41,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:41,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:41,769 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) [2024-11-09 23:23:41,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 23:23:41,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:23:41,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:41,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 23:23:41,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 23:23:41,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 23:23:44,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643418325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:44,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:44,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-11-09 23:23:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243722019] [2024-11-09 23:23:44,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:44,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 23:23:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:44,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 23:23:44,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-09 23:23:44,422 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-09 23:23:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:44,558 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-11-09 23:23:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 23:23:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 59 [2024-11-09 23:23:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:44,559 INFO L225 Difference]: With dead ends: 45 [2024-11-09 23:23:44,559 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 23:23:44,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-09 23:23:44,561 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:44,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 98 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:23:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 23:23:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 23:23:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 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) [2024-11-09 23:23:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-09 23:23:44,572 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 59 [2024-11-09 23:23:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:44,575 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-09 23:23:44,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 24 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-11-09 23:23:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-09 23:23:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 23:23:44,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:44,576 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:44,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 23:23:44,776 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 [2024-11-09 23:23:44,777 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:44,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1024621717, now seen corresponding path program 9 times [2024-11-09 23:23:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582448889] [2024-11-09 23:23:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:44,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:44,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 23:23:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582448889] [2024-11-09 23:23:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582448889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821364352] [2024-11-09 23:23:45,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 23:23:45,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:45,351 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) [2024-11-09 23:23:45,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 23:23:45,533 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 23:23:45,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:45,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 23:23:45,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-09 23:23:45,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 23:23:48,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821364352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:48,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-11-09 23:23:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504241709] [2024-11-09 23:23:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:48,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 23:23:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 23:23:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-09 23:23:48,785 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-09 23:23:48,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:48,906 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-09 23:23:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 23:23:48,906 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 65 [2024-11-09 23:23:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:48,907 INFO L225 Difference]: With dead ends: 48 [2024-11-09 23:23:48,907 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 23:23:48,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 23:23:48,908 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:48,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 113 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:23:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 23:23:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 23:23:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 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) [2024-11-09 23:23:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-11-09 23:23:48,919 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-11-09 23:23:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:48,919 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-11-09 23:23:48,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 26 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-11-09 23:23:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-11-09 23:23:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 23:23:48,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:48,920 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:48,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:49,121 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 [2024-11-09 23:23:49,121 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:49,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -971300531, now seen corresponding path program 10 times [2024-11-09 23:23:49,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:49,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290835729] [2024-11-09 23:23:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:49,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,691 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-09 23:23:49,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:49,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290835729] [2024-11-09 23:23:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290835729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:49,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062270843] [2024-11-09 23:23:49,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 23:23:49,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:49,790 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) [2024-11-09 23:23:49,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 23:23:50,008 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 23:23:50,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:50,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 23:23:50,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-09 23:23:50,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:23:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 23:23:54,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062270843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:23:54,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:23:54,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-11-09 23:23:54,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869579494] [2024-11-09 23:23:54,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:23:54,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 23:23:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:23:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 23:23:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-09 23:23:54,458 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-09 23:23:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:23:54,630 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-11-09 23:23:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 23:23:54,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 71 [2024-11-09 23:23:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:23:54,632 INFO L225 Difference]: With dead ends: 51 [2024-11-09 23:23:54,632 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 23:23:54,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 23:23:54,633 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:23:54,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 111 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:23:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 23:23:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-09 23:23:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 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) [2024-11-09 23:23:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-09 23:23:54,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 71 [2024-11-09 23:23:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:23:54,641 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-09 23:23:54,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 28 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-11-09 23:23:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-09 23:23:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 23:23:54,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:23:54,642 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:23:54,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 23:23:54,842 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 [2024-11-09 23:23:54,843 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:23:54,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:23:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1835662379, now seen corresponding path program 11 times [2024-11-09 23:23:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:23:54,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365914651] [2024-11-09 23:23:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:23:54,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:23:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:54,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:23:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:23:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 23:23:55,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:23:55,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365914651] [2024-11-09 23:23:55,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365914651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:23:55,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077317291] [2024-11-09 23:23:55,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 23:23:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:23:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:23:55,563 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) [2024-11-09 23:23:55,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 23:23:55,858 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-09 23:23:55,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:23:55,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 23:23:55,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:23:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 23:23:55,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:24:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 23:24:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077317291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:24:01,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:24:01,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-11-09 23:24:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574033299] [2024-11-09 23:24:01,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:24:01,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 23:24:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:24:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 23:24:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-11-09 23:24:01,640 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-09 23:24:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:24:01,758 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-11-09 23:24:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 23:24:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 77 [2024-11-09 23:24:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:24:01,760 INFO L225 Difference]: With dead ends: 54 [2024-11-09 23:24:01,760 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 23:24:01,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 151 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 23:24:01,762 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:24:01,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 120 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:24:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 23:24:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-09 23:24:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 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) [2024-11-09 23:24:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-09 23:24:01,768 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 77 [2024-11-09 23:24:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:24:01,769 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-09 23:24:01,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.142857142857143) internal successors, (60), 30 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-09 23:24:01,769 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-09 23:24:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-09 23:24:01,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:24:01,770 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:24:01,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 23:24:01,974 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 [2024-11-09 23:24:01,975 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:24:01,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:24:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1357141875, now seen corresponding path program 12 times [2024-11-09 23:24:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:24:01,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364964849] [2024-11-09 23:24:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:24:01,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:24:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,413 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 23:24:02,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:24:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364964849] [2024-11-09 23:24:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364964849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:24:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252512520] [2024-11-09 23:24:02,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 23:24:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:24:02,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:24:02,795 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) [2024-11-09 23:24:02,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 23:24:03,199 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-09 23:24:03,199 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:24:03,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 23:24:03,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:24:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 23:24:03,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:24:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 23:24:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252512520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:24:10,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:24:10,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-11-09 23:24:10,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301632762] [2024-11-09 23:24:10,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:24:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 23:24:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:24:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 23:24:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-11-09 23:24:10,492 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-09 23:24:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:24:10,651 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-11-09 23:24:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 23:24:10,651 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 83 [2024-11-09 23:24:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:24:10,652 INFO L225 Difference]: With dead ends: 57 [2024-11-09 23:24:10,652 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 23:24:10,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 23:24:10,653 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:24:10,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 125 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:24:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 23:24:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-09 23:24:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 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) [2024-11-09 23:24:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-09 23:24:10,659 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 83 [2024-11-09 23:24:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:24:10,659 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-09 23:24:10,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 32 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-11-09 23:24:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-09 23:24:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 23:24:10,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:24:10,661 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:24:10,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 23:24:10,861 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 [2024-11-09 23:24:10,861 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:24:10,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:24:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash -392960789, now seen corresponding path program 13 times [2024-11-09 23:24:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:24:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392085430] [2024-11-09 23:24:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:24:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:24:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:10,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,269 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,522 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,667 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-09 23:24:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:24:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392085430] [2024-11-09 23:24:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392085430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:24:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142762628] [2024-11-09 23:24:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 23:24:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:24:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:24:11,741 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) [2024-11-09 23:24:11,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 23:24:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:12,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 23:24:12,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:24:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-09 23:24:12,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:24:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-09 23:24:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142762628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:24:21,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:24:21,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-11-09 23:24:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37242942] [2024-11-09 23:24:21,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:24:21,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 23:24:21,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:24:21,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 23:24:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 23:24:21,602 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-09 23:24:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:24:21,753 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-11-09 23:24:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 23:24:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 89 [2024-11-09 23:24:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:24:21,754 INFO L225 Difference]: With dead ends: 60 [2024-11-09 23:24:21,754 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 23:24:21,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 175 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 23:24:21,755 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:24:21,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 124 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:24:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 23:24:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-09 23:24:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 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) [2024-11-09 23:24:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-09 23:24:21,761 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 89 [2024-11-09 23:24:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:24:21,761 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-09 23:24:21,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 34 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-11-09 23:24:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-09 23:24:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 23:24:21,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:24:21,763 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:24:21,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 23:24:21,963 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 [2024-11-09 23:24:21,964 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:24:21,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:24:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1743044557, now seen corresponding path program 14 times [2024-11-09 23:24:21,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:24:21,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622114349] [2024-11-09 23:24:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:24:21,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:24:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,550 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,825 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-09 23:24:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:24:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622114349] [2024-11-09 23:24:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622114349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:24:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858534743] [2024-11-09 23:24:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:24:22,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:24:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:24:22,953 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) [2024-11-09 23:24:22,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 23:24:23,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:24:23,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:24:23,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 23:24:23,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:24:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-09 23:24:23,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:24:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-09 23:24:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858534743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:24:34,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:24:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-11-09 23:24:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420658529] [2024-11-09 23:24:34,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:24:34,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 23:24:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:24:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 23:24:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 23:24:34,865 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-09 23:24:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:24:35,048 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-11-09 23:24:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 23:24:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 95 [2024-11-09 23:24:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:24:35,049 INFO L225 Difference]: With dead ends: 63 [2024-11-09 23:24:35,049 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 23:24:35,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 23:24:35,051 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:24:35,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 130 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:24:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 23:24:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-09 23:24:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 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) [2024-11-09 23:24:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-09 23:24:35,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 95 [2024-11-09 23:24:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:24:35,056 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-09 23:24:35,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 36 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-11-09 23:24:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-09 23:24:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 23:24:35,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:24:35,058 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:24:35,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 23:24:35,261 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 [2024-11-09 23:24:35,262 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:24:35,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:24:35,262 INFO L85 PathProgramCache]: Analyzing trace with hash -132694613, now seen corresponding path program 15 times [2024-11-09 23:24:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:24:35,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644135877] [2024-11-09 23:24:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:24:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:24:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,391 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:35,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,192 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-09 23:24:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:24:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644135877] [2024-11-09 23:24:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644135877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:24:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414066820] [2024-11-09 23:24:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 23:24:36,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:24:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:24:36,358 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) [2024-11-09 23:24:36,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 23:24:37,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 23:24:37,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:24:37,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 23:24:37,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:24:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-11-09 23:24:37,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:24:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-09 23:24:51,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414066820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:24:51,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:24:51,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-11-09 23:24:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6856005] [2024-11-09 23:24:51,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:24:51,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 23:24:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:24:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 23:24:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 23:24:51,034 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-09 23:24:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:24:51,223 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-11-09 23:24:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 23:24:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 101 [2024-11-09 23:24:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:24:51,224 INFO L225 Difference]: With dead ends: 66 [2024-11-09 23:24:51,225 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 23:24:51,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 23:24:51,226 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:24:51,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 150 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:24:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 23:24:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-09 23:24:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 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) [2024-11-09 23:24:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-09 23:24:51,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 101 [2024-11-09 23:24:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:24:51,232 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-09 23:24:51,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 38 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-11-09 23:24:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-09 23:24:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 23:24:51,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:24:51,233 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:24:51,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 23:24:51,434 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 [2024-11-09 23:24:51,434 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:24:51,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:24:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash -615880947, now seen corresponding path program 16 times [2024-11-09 23:24:51,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:24:51,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906683028] [2024-11-09 23:24:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:24:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:24:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:51,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:51,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:51,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:51,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:52,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:24:52,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:24:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat