./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 03:15:20,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 03:15:20,289 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 03:15:20,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 03:15:20,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 03:15:20,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 03:15:20,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 03:15:20,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 03:15:20,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 03:15:20,322 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 03:15:20,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 03:15:20,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 03:15:20,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 03:15:20,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 03:15:20,324 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 03:15:20,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 03:15:20,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 03:15:20,325 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 03:15:20,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 03:15:20,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 03:15:20,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 03:15:20,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 03:15:20,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 03:15:20,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 03:15:20,328 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 03:15:20,328 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 03:15:20,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 03:15:20,329 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 03:15:20,329 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 03:15:20,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 03:15:20,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 03:15:20,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 03:15:20,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:15:20,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 03:15:20,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 03:15:20,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 03:15:20,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 03:15:20,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 03:15:20,332 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 03:15:20,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 03:15:20,333 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 03:15:20,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 03:15:20,333 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2467b918f90fe26ead39772ec36304202be3f16a6c04dfdd5844d39d05599b5a [2024-10-14 03:15:20,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 03:15:20,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 03:15:20,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 03:15:20,590 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 03:15:20,591 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 03:15:20,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-10-14 03:15:21,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 03:15:22,146 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 03:15:22,147 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c [2024-10-14 03:15:22,153 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c247497eb/50b6cabfe1524c32b5cdb88dcb0f758d/FLAGf826dcb69 [2024-10-14 03:15:22,166 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c247497eb/50b6cabfe1524c32b5cdb88dcb0f758d [2024-10-14 03:15:22,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 03:15:22,169 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 03:15:22,171 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 03:15:22,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 03:15:22,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 03:15:22,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29515e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22, skipping insertion in model container [2024-10-14 03:15:22,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,195 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 03:15:22,357 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-10-14 03:15:22,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:15:22,378 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 03:15:22,392 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_20x0-2.c[481,494] [2024-10-14 03:15:22,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:15:22,418 INFO L204 MainTranslator]: Completed translation [2024-10-14 03:15:22,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22 WrapperNode [2024-10-14 03:15:22,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 03:15:22,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 03:15:22,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 03:15:22,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 03:15:22,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,448 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-10-14 03:15:22,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 03:15:22,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 03:15:22,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 03:15:22,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 03:15:22,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,472 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]. [2024-10-14 03:15:22,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 03:15:22,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 03:15:22,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 03:15:22,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 03:15:22,488 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (1/1) ... [2024-10-14 03:15:22,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:15:22,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:22,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 03:15:22,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 03:15:22,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 03:15:22,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 03:15:22,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 03:15:22,570 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-10-14 03:15:22,571 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-10-14 03:15:22,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 03:15:22,660 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 03:15:22,663 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 03:15:22,746 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-14 03:15:22,746 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 03:15:22,765 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 03:15:22,766 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-14 03:15:22,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:15:22 BoogieIcfgContainer [2024-10-14 03:15:22,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 03:15:22,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 03:15:22,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 03:15:22,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 03:15:22,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:15:22" (1/3) ... [2024-10-14 03:15:22,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1df5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:15:22, skipping insertion in model container [2024-10-14 03:15:22,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:15:22" (2/3) ... [2024-10-14 03:15:22,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba1df5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:15:22, skipping insertion in model container [2024-10-14 03:15:22,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:15:22" (3/3) ... [2024-10-14 03:15:22,776 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2024-10-14 03:15:22,791 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 03:15:22,791 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 03:15:22,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 03:15:22,845 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;@57c74356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 03:15:22,846 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 03:15:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2024-10-14 03:15:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 03:15:22,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:22,859 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:22,859 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:22,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2024-10-14 03:15:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19964529] [2024-10-14 03:15:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 03:15:23,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19964529] [2024-10-14 03:15:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19964529] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:15:23,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:15:23,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 03:15:23,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403885835] [2024-10-14 03:15:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:15:23,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 03:15:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 03:15:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 03:15:23,201 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-10-14 03:15:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:23,269 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-14 03:15:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 03:15:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 9 [2024-10-14 03:15:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:23,279 INFO L225 Difference]: With dead ends: 22 [2024-10-14 03:15:23,279 INFO L226 Difference]: Without dead ends: 14 [2024-10-14 03:15:23,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 03:15:23,285 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:23,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:15:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-14 03:15:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-14 03:15:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 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) [2024-10-14 03:15:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-10-14 03:15:23,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2024-10-14 03:15:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:23,321 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-10-14 03:15:23,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2024-10-14 03:15:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-10-14 03:15:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 03:15:23,322 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:23,323 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:23,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 03:15:23,323 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:23,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:23,324 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2024-10-14 03:15:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:23,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129656244] [2024-10-14 03:15:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 03:15:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129656244] [2024-10-14 03:15:23,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129656244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:23,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215529176] [2024-10-14 03:15:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:23,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:23,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:23,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:23,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 03:15:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:23,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 03:15:23,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 03:15:23,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 03:15:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215529176] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:23,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-10-14 03:15:23,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703886993] [2024-10-14 03:15:23,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:23,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 03:15:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 03:15:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-14 03:15:23,984 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-10-14 03:15:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:24,050 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-10-14 03:15:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 03:15:24,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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 15 [2024-10-14 03:15:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:24,052 INFO L225 Difference]: With dead ends: 21 [2024-10-14 03:15:24,052 INFO L226 Difference]: Without dead ends: 17 [2024-10-14 03:15:24,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-14 03:15:24,054 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:24,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:15:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-14 03:15:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-14 03:15:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 03:15:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-10-14 03:15:24,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2024-10-14 03:15:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:24,065 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-10-14 03:15:24,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 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) [2024-10-14 03:15:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-10-14 03:15:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 03:15:24,067 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:24,068 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:24,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 03:15:24,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:24,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:24,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2024-10-14 03:15:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292860586] [2024-10-14 03:15:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:24,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:24,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:24,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 03:15:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292860586] [2024-10-14 03:15:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292860586] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066528189] [2024-10-14 03:15:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:15:24,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:24,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:24,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:24,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 03:15:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:15:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:24,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 03:15:24,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 03:15:24,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 03:15:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066528189] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:24,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-10-14 03:15:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920015484] [2024-10-14 03:15:24,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:24,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 03:15:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 03:15:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-10-14 03:15:24,987 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 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) [2024-10-14 03:15:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:25,058 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-10-14 03:15:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 03:15:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 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 21 [2024-10-14 03:15:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:25,060 INFO L225 Difference]: With dead ends: 24 [2024-10-14 03:15:25,060 INFO L226 Difference]: Without dead ends: 20 [2024-10-14 03:15:25,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-14 03:15:25,062 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:25,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:15:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-14 03:15:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-14 03:15:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 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), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 03:15:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-10-14 03:15:25,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2024-10-14 03:15:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:25,073 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-10-14 03:15:25,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 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) [2024-10-14 03:15:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-10-14 03:15:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 03:15:25,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:25,075 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:25,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 03:15:25,275 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 [2024-10-14 03:15:25,276 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:25,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2024-10-14 03:15:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944178814] [2024-10-14 03:15:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:25,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:25,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:25,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:25,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 03:15:25,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:25,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944178814] [2024-10-14 03:15:25,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944178814] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034735888] [2024-10-14 03:15:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:15:25,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:25,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:25,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 03:15:25,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 03:15:25,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:25,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 03:15:25,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 03:15:25,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 03:15:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034735888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:26,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-10-14 03:15:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445796737] [2024-10-14 03:15:26,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:26,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 03:15:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 03:15:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-14 03:15:26,142 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 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) [2024-10-14 03:15:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:26,230 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-10-14 03:15:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 03:15:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 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 27 [2024-10-14 03:15:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:26,231 INFO L225 Difference]: With dead ends: 27 [2024-10-14 03:15:26,232 INFO L226 Difference]: Without dead ends: 23 [2024-10-14 03:15:26,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-10-14 03:15:26,233 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:26,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 44 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-14 03:15:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-14 03:15:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 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), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-14 03:15:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-10-14 03:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2024-10-14 03:15:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:26,241 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-10-14 03:15:26,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 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) [2024-10-14 03:15:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-10-14 03:15:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 03:15:26,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:26,242 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:26,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 03:15:26,446 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 [2024-10-14 03:15:26,447 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:26,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2024-10-14 03:15:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:26,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095380817] [2024-10-14 03:15:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:26,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,578 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,622 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-14 03:15:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095380817] [2024-10-14 03:15:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095380817] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282508025] [2024-10-14 03:15:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 03:15:26,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:26,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:26,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 03:15:26,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 03:15:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:26,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 03:15:26,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-14 03:15:26,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 03:15:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282508025] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:27,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-10-14 03:15:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311688107] [2024-10-14 03:15:27,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:27,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 03:15:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 03:15:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-10-14 03:15:27,601 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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) [2024-10-14 03:15:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:27,693 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-10-14 03:15:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 03:15:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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 33 [2024-10-14 03:15:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:27,694 INFO L225 Difference]: With dead ends: 30 [2024-10-14 03:15:27,694 INFO L226 Difference]: Without dead ends: 26 [2024-10-14 03:15:27,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-10-14 03:15:27,697 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:27,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 45 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-14 03:15:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-14 03:15:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 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), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-14 03:15:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-10-14 03:15:27,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2024-10-14 03:15:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:27,716 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-10-14 03:15:27,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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) [2024-10-14 03:15:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-10-14 03:15:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 03:15:27,717 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:27,717 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:27,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 03:15:27,917 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 [2024-10-14 03:15:27,918 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:27,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:27,918 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2024-10-14 03:15:27,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:27,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088345234] [2024-10-14 03:15:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:27,975 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,160 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-14 03:15:28,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088345234] [2024-10-14 03:15:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088345234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344036202] [2024-10-14 03:15:28,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 03:15:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:28,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:28,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 03:15:28,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-14 03:15:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:28,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 03:15:28,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-14 03:15:28,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 03:15:29,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344036202] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:29,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:29,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-10-14 03:15:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957060324] [2024-10-14 03:15:29,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:29,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 03:15:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 03:15:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-10-14 03:15:29,413 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-10-14 03:15:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:29,495 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-10-14 03:15:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 03:15:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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 39 [2024-10-14 03:15:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:29,497 INFO L225 Difference]: With dead ends: 33 [2024-10-14 03:15:29,497 INFO L226 Difference]: Without dead ends: 29 [2024-10-14 03:15:29,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-10-14 03:15:29,499 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:29,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-14 03:15:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-14 03:15:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 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), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-14 03:15:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-10-14 03:15:29,505 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2024-10-14 03:15:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:29,507 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-10-14 03:15:29,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-10-14 03:15:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-10-14 03:15:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 03:15:29,509 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:29,509 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:29,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 03:15:29,709 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 [2024-10-14 03:15:29,710 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:29,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2024-10-14 03:15:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272683651] [2024-10-14 03:15:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:29,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:29,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:29,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:29,998 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:30,033 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:30,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:30,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-14 03:15:30,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:30,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272683651] [2024-10-14 03:15:30,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272683651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:30,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808185265] [2024-10-14 03:15:30,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 03:15:30,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:30,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:30,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:30,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 03:15:30,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-14 03:15:30,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:30,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 03:15:30,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-10-14 03:15:30,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 03:15:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808185265] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:31,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:31,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-10-14 03:15:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285335893] [2024-10-14 03:15:31,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:31,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 03:15:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 03:15:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-10-14 03:15:31,758 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 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) [2024-10-14 03:15:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:31,862 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-10-14 03:15:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 03:15:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 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 45 [2024-10-14 03:15:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:31,864 INFO L225 Difference]: With dead ends: 36 [2024-10-14 03:15:31,864 INFO L226 Difference]: Without dead ends: 32 [2024-10-14 03:15:31,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-10-14 03:15:31,865 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:31,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-14 03:15:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-14 03:15:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 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), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-10-14 03:15:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-10-14 03:15:31,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2024-10-14 03:15:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:31,876 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-10-14 03:15:31,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 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) [2024-10-14 03:15:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-10-14 03:15:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-14 03:15:31,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:31,878 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:31,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 03:15:32,079 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 [2024-10-14 03:15:32,079 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:32,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2024-10-14 03:15:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371780982] [2024-10-14 03:15:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,448 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,468 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-10-14 03:15:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371780982] [2024-10-14 03:15:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371780982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278057302] [2024-10-14 03:15:32,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 03:15:32,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:32,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:15:32,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 03:15:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:32,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 03:15:32,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-10-14 03:15:32,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 03:15:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278057302] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:34,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-10-14 03:15:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797980332] [2024-10-14 03:15:34,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:34,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 03:15:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 03:15:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-10-14 03:15:34,501 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 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) [2024-10-14 03:15:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:34,613 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-10-14 03:15:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 03:15:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 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 51 [2024-10-14 03:15:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:34,615 INFO L225 Difference]: With dead ends: 39 [2024-10-14 03:15:34,615 INFO L226 Difference]: Without dead ends: 35 [2024-10-14 03:15:34,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-10-14 03:15:34,616 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:34,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-14 03:15:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-14 03:15:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 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), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-10-14 03:15:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-10-14 03:15:34,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2024-10-14 03:15:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:34,624 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-10-14 03:15:34,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 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) [2024-10-14 03:15:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-10-14 03:15:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-14 03:15:34,625 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:34,625 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:34,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 03:15:34,829 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 [2024-10-14 03:15:34,830 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:34,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2024-10-14 03:15:34,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:34,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195811336] [2024-10-14 03:15:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:34,908 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,116 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,217 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-14 03:15:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195811336] [2024-10-14 03:15:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195811336] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783857096] [2024-10-14 03:15:35,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:15:35,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:35,351 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) [2024-10-14 03:15:35,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 03:15:35,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:15:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:35,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 03:15:35,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-14 03:15:35,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-14 03:15:37,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783857096] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:37,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:37,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-10-14 03:15:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626980080] [2024-10-14 03:15:37,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:37,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 03:15:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 03:15:37,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-10-14 03:15:37,991 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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) [2024-10-14 03:15:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:38,111 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-10-14 03:15:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 03:15:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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 57 [2024-10-14 03:15:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:38,113 INFO L225 Difference]: With dead ends: 42 [2024-10-14 03:15:38,113 INFO L226 Difference]: Without dead ends: 38 [2024-10-14 03:15:38,114 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-10-14 03:15:38,114 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:38,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-14 03:15:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-14 03:15:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 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), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-10-14 03:15:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-10-14 03:15:38,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2024-10-14 03:15:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:38,126 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-10-14 03:15:38,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 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) [2024-10-14 03:15:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-10-14 03:15:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-14 03:15:38,130 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:38,130 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:38,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 03:15:38,330 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 [2024-10-14 03:15:38,331 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:38,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2024-10-14 03:15:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093937746] [2024-10-14 03:15:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-10-14 03:15:38,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:38,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093937746] [2024-10-14 03:15:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093937746] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087617274] [2024-10-14 03:15:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:15:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:38,905 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) [2024-10-14 03:15:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 03:15:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-14 03:15:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:39,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 03:15:39,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-10-14 03:15:39,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-14 03:15:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087617274] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:42,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-10-14 03:15:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914907862] [2024-10-14 03:15:42,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:42,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 03:15:42,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 03:15:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-10-14 03:15:42,438 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 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) [2024-10-14 03:15:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:42,573 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-10-14 03:15:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 03:15:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 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 63 [2024-10-14 03:15:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:42,575 INFO L225 Difference]: With dead ends: 45 [2024-10-14 03:15:42,575 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 03:15:42,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 03:15:42,576 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:42,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 64 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 03:15:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-14 03:15:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 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), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-10-14 03:15:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-10-14 03:15:42,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2024-10-14 03:15:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:42,582 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-10-14 03:15:42,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 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) [2024-10-14 03:15:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-10-14 03:15:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:15:42,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:42,583 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:42,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 03:15:42,784 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 [2024-10-14 03:15:42,784 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:42,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2024-10-14 03:15:42,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:42,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600368338] [2024-10-14 03:15:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:42,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:42,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:42,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-14 03:15:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:43,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600368338] [2024-10-14 03:15:43,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600368338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:43,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673699881] [2024-10-14 03:15:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 03:15:43,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:43,417 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) [2024-10-14 03:15:43,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 03:15:43,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 03:15:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:43,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 03:15:43,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-10-14 03:15:43,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-14 03:15:48,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673699881] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:48,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:48,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-10-14 03:15:48,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270555343] [2024-10-14 03:15:48,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:48,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 03:15:48,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 03:15:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-10-14 03:15:48,164 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 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) [2024-10-14 03:15:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:48,296 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-10-14 03:15:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 03:15:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 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 69 [2024-10-14 03:15:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:48,298 INFO L225 Difference]: With dead ends: 48 [2024-10-14 03:15:48,298 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 03:15:48,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 03:15:48,299 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 109 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:48,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 68 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 03:15:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-14 03:15:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 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), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-10-14 03:15:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-10-14 03:15:48,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2024-10-14 03:15:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:48,310 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-10-14 03:15:48,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 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) [2024-10-14 03:15:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-10-14 03:15:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-14 03:15:48,312 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:48,312 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:48,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 03:15:48,515 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 [2024-10-14 03:15:48,516 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:48,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2024-10-14 03:15:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:48,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132075404] [2024-10-14 03:15:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:48,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:48,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:48,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:48,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:48,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:48,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-14 03:15:49,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132075404] [2024-10-14 03:15:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132075404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810768949] [2024-10-14 03:15:49,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 03:15:49,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:49,223 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) [2024-10-14 03:15:49,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 03:15:49,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-10-14 03:15:49,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:49,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 03:15:49,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-10-14 03:15:49,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:15:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-14 03:15:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810768949] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:15:55,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:15:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-10-14 03:15:55,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338188864] [2024-10-14 03:15:55,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:15:55,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 03:15:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:15:55,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 03:15:55,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-10-14 03:15:55,201 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 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) [2024-10-14 03:15:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:15:55,350 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-10-14 03:15:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:15:55,351 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 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 75 [2024-10-14 03:15:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:15:55,352 INFO L225 Difference]: With dead ends: 51 [2024-10-14 03:15:55,352 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 03:15:55,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 03:15:55,353 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:15:55,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 72 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:15:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 03:15:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-14 03:15:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 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), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-10-14 03:15:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-10-14 03:15:55,358 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-10-14 03:15:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:15:55,358 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-10-14 03:15:55,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 29 states have internal predecessors, (58), 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) [2024-10-14 03:15:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-10-14 03:15:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-14 03:15:55,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:15:55,359 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:15:55,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 03:15:55,560 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 [2024-10-14 03:15:55,560 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:15:55,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:15:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2024-10-14 03:15:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:15:55,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610677246] [2024-10-14 03:15:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:15:55,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:15:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:55,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:15:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:55,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:55,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:55,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:55,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,121 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:15:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:15:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-14 03:15:56,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:15:56,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610677246] [2024-10-14 03:15:56,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610677246] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:15:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198535633] [2024-10-14 03:15:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 03:15:56,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:15:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:15:56,367 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) [2024-10-14 03:15:56,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 03:15:56,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-10-14 03:15:56,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:15:56,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 03:15:56,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:15:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-14 03:15:56,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-14 03:16:04,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198535633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:04,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-10-14 03:16:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671728878] [2024-10-14 03:16:04,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:04,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 03:16:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 03:16:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-10-14 03:16:04,163 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 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) [2024-10-14 03:16:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:04,318 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-10-14 03:16:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 03:16:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 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 81 [2024-10-14 03:16:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:04,320 INFO L225 Difference]: With dead ends: 54 [2024-10-14 03:16:04,320 INFO L226 Difference]: Without dead ends: 50 [2024-10-14 03:16:04,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-10-14 03:16:04,321 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:04,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-14 03:16:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-14 03:16:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 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), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-10-14 03:16:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-10-14 03:16:04,334 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2024-10-14 03:16:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:04,334 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-10-14 03:16:04,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 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) [2024-10-14 03:16:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-10-14 03:16:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-14 03:16:04,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:04,335 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:04,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 03:16:04,535 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 [2024-10-14 03:16:04,536 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:04,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2024-10-14 03:16:04,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:04,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528507349] [2024-10-14 03:16:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:04,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:04,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:04,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:04,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:04,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:04,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,040 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-10-14 03:16:05,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:05,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528507349] [2024-10-14 03:16:05,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528507349] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:05,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631295598] [2024-10-14 03:16:05,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 03:16:05,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:05,368 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) [2024-10-14 03:16:05,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 03:16:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:05,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 03:16:05,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-10-14 03:16:05,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-14 03:16:15,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631295598] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:15,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-10-14 03:16:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587811576] [2024-10-14 03:16:15,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:15,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 03:16:15,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 03:16:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 03:16:15,118 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 34 states, 32 states have (on average 2.0625) internal successors, (66), 33 states have internal predecessors, (66), 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) [2024-10-14 03:16:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:15,301 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-10-14 03:16:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 03:16:15,302 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 33 states have internal predecessors, (66), 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 87 [2024-10-14 03:16:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:15,302 INFO L225 Difference]: With dead ends: 57 [2024-10-14 03:16:15,302 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 03:16:15,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-10-14 03:16:15,303 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:15,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 73 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 03:16:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 03:16:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 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), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-10-14 03:16:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-10-14 03:16:15,309 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2024-10-14 03:16:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:15,309 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-10-14 03:16:15,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 33 states have internal predecessors, (66), 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) [2024-10-14 03:16:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-10-14 03:16:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-14 03:16:15,310 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:15,311 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:15,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 03:16:15,511 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 [2024-10-14 03:16:15,511 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:15,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2024-10-14 03:16:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:15,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723812030] [2024-10-14 03:16:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:15,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:15,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:15,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:15,951 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-10-14 03:16:16,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723812030] [2024-10-14 03:16:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723812030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819869346] [2024-10-14 03:16:16,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:16:16,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:16,500 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) [2024-10-14 03:16:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 03:16:17,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:16:17,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:16:17,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 03:16:17,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-10-14 03:16:17,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-10-14 03:16:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819869346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:28,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:28,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-10-14 03:16:28,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125417659] [2024-10-14 03:16:28,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:28,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 03:16:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:28,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 03:16:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 03:16:28,517 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 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) [2024-10-14 03:16:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:28,694 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-10-14 03:16:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 03:16:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 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 93 [2024-10-14 03:16:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:28,696 INFO L225 Difference]: With dead ends: 60 [2024-10-14 03:16:28,696 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 03:16:28,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 182 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-10-14 03:16:28,698 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:28,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 87 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 03:16:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-10-14 03:16:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 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), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-10-14 03:16:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-10-14 03:16:28,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2024-10-14 03:16:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:28,703 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-10-14 03:16:28,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 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) [2024-10-14 03:16:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-10-14 03:16:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-10-14 03:16:28,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:28,705 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:28,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 03:16:28,905 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 [2024-10-14 03:16:28,906 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:28,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2024-10-14 03:16:28,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:28,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692209220] [2024-10-14 03:16:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:28,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,174 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,925 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-10-14 03:16:29,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692209220] [2024-10-14 03:16:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692209220] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676652350] [2024-10-14 03:16:29,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:16:29,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:29,949 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) [2024-10-14 03:16:29,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 03:16:30,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-10-14 03:16:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:16:30,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 03:16:30,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:16:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-10-14 03:16:30,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:16:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-10-14 03:16:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676652350] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:16:44,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:16:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-10-14 03:16:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804009222] [2024-10-14 03:16:44,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:16:44,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 03:16:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:16:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 03:16:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 03:16:44,723 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 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) [2024-10-14 03:16:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:16:44,927 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-10-14 03:16:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 03:16:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 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 99 [2024-10-14 03:16:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:16:44,928 INFO L225 Difference]: With dead ends: 63 [2024-10-14 03:16:44,928 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 03:16:44,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-10-14 03:16:44,929 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 122 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:16:44,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 84 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:16:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 03:16:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-14 03:16:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 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), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-10-14 03:16:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-10-14 03:16:44,935 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2024-10-14 03:16:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:16:44,935 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-10-14 03:16:44,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 37 states have internal predecessors, (74), 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) [2024-10-14 03:16:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-10-14 03:16:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-14 03:16:44,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:16:44,936 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:16:44,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 03:16:45,137 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 [2024-10-14 03:16:45,137 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:16:45,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:16:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2024-10-14 03:16:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:16:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116232430] [2024-10-14 03:16:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:16:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:16:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:16:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,750 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:45,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,154 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,278 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:16:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:16:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-10-14 03:16:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:16:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116232430] [2024-10-14 03:16:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116232430] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:16:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382226659] [2024-10-14 03:16:46,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 03:16:46,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:16:46,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:16:46,330 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:16:46,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process