./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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/reducercommutativity/rangesum40.i -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 a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:42:43,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:42:43,183 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:42:43,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:42:43,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:42:43,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:42:43,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:42:43,228 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:42:43,228 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:42:43,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:42:43,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:42:43,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:42:43,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:42:43,232 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:42:43,232 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:42:43,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:42:43,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:42:43,233 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:42:43,233 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:42:43,233 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:42:43,234 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:42:43,237 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:42:43,238 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:42:43,238 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:42:43,238 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:42:43,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:42:43,239 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:42:43,239 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:42:43,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:42:43,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:42:43,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:42:43,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:42:43,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:42:43,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:42:43,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:42:43,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:42:43,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:42:43,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:42:43,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:42:43,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:42:43,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:42:43,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:42:43,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf [2024-10-23 19:42:43,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:42:43,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:42:43,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:42:43,550 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:42:43,550 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:42:43,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i [2024-10-23 19:42:45,017 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:42:45,220 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:42:45,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i [2024-10-23 19:42:45,228 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dee95b128/b7f99e3b945c4a2a9fe806bf3da47dcb/FLAGdad9a4e56 [2024-10-23 19:42:45,240 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dee95b128/b7f99e3b945c4a2a9fe806bf3da47dcb [2024-10-23 19:42:45,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:42:45,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:42:45,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:42:45,245 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:42:45,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:42:45,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ea641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45, skipping insertion in model container [2024-10-23 19:42:45,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,276 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:42:45,474 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/reducercommutativity/rangesum40.i[1465,1478] [2024-10-23 19:42:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:42:45,492 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:42:45,522 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/reducercommutativity/rangesum40.i[1465,1478] [2024-10-23 19:42:45,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:42:45,543 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:42:45,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45 WrapperNode [2024-10-23 19:42:45,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:42:45,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:42:45,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:42:45,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:42:45,552 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,587 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-23 19:42:45,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:42:45,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:42:45,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:42:45,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:42:45,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,621 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-23 19:42:45,621 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,641 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,649 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:42:45,650 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:42:45,650 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:42:45,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:42:45,651 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (1/1) ... [2024-10-23 19:42:45,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:42:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:45,692 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) [2024-10-23 19:42:45,697 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 [2024-10-23 19:42:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:42:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:42:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:42:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:42:45,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:42:45,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:42:45,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:42:45,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:42:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:42:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:42:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2024-10-23 19:42:45,749 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2024-10-23 19:42:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:42:45,845 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:42:45,848 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:42:46,045 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-10-23 19:42:46,045 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:42:46,072 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:42:46,072 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-23 19:42:46,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:42:46 BoogieIcfgContainer [2024-10-23 19:42:46,073 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:42:46,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:42:46,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:42:46,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:42:46,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:42:45" (1/3) ... [2024-10-23 19:42:46,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cc2ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:42:46, skipping insertion in model container [2024-10-23 19:42:46,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:45" (2/3) ... [2024-10-23 19:42:46,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55cc2ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:42:46, skipping insertion in model container [2024-10-23 19:42:46,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:42:46" (3/3) ... [2024-10-23 19:42:46,082 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2024-10-23 19:42:46,099 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:42:46,100 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:42:46,184 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:42:46,191 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;@284c002b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:42:46,192 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:42:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-23 19:42:46,203 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:46,204 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:46,205 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:46,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1502132506, now seen corresponding path program 1 times [2024-10-23 19:42:46,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:46,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167495675] [2024-10-23 19:42:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-23 19:42:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-23 19:42:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 19:42:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 19:42:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167495675] [2024-10-23 19:42:46,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167495675] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:46,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:42:46,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:42:46,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978023312] [2024-10-23 19:42:46,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:46,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:42:46,589 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:46,638 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2024-10-23 19:42:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2024-10-23 19:42:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:46,650 INFO L225 Difference]: With dead ends: 45 [2024-10-23 19:42:46,650 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 19:42:46,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:42:46,657 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:46,658 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 19:42:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-23 19:42:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-23 19:42:46,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2024-10-23 19:42:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:46,697 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-23 19:42:46,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-23 19:42:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-23 19:42:46,700 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:46,700 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:46,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:42:46,700 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:46,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash -432814053, now seen corresponding path program 1 times [2024-10-23 19:42:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:46,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598658000] [2024-10-23 19:42:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:46,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-23 19:42:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 19:42:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 19:42:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598658000] [2024-10-23 19:42:46,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598658000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52290842] [2024-10-23 19:42:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:46,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:46,978 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) [2024-10-23 19:42:46,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:42:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 19:42:47,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:42:47,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52290842] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:47,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:47,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-23 19:42:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514071779] [2024-10-23 19:42:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:47,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:47,131 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:47,160 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-10-23 19:42:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-23 19:42:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:47,162 INFO L225 Difference]: With dead ends: 42 [2024-10-23 19:42:47,162 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:42:47,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:47,164 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:47,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:42:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-23 19:42:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-23 19:42:47,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2024-10-23 19:42:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:47,174 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-23 19:42:47,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-23 19:42:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 19:42:47,176 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:47,176 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:47,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:42:47,380 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 [2024-10-23 19:42:47,381 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:47,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 28977858, now seen corresponding path program 1 times [2024-10-23 19:42:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340853798] [2024-10-23 19:42:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,507 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 19:42:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-23 19:42:47,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:47,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340853798] [2024-10-23 19:42:47,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340853798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206623278] [2024-10-23 19:42:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:47,554 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) [2024-10-23 19:42:47,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:42:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:47,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 19:42:47,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-23 19:42:47,668 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206623278] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:47,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-23 19:42:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492638394] [2024-10-23 19:42:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:47,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:47,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:47,672 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:47,690 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-23 19:42:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-10-23 19:42:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:47,692 INFO L225 Difference]: With dead ends: 40 [2024-10-23 19:42:47,693 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:42:47,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:47,694 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:47,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:42:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-23 19:42:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-23 19:42:47,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 38 [2024-10-23 19:42:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:47,705 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-23 19:42:47,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-23 19:42:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 19:42:47,709 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:47,709 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:47,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:47,910 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 [2024-10-23 19:42:47,910 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:47,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2098863663, now seen corresponding path program 1 times [2024-10-23 19:42:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969780095] [2024-10-23 19:42:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 19:42:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:48,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969780095] [2024-10-23 19:42:48,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969780095] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:48,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563999135] [2024-10-23 19:42:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:48,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:48,065 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) [2024-10-23 19:42:48,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:42:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:48,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 19:42:48,202 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563999135] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-23 19:42:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260432044] [2024-10-23 19:42:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:48,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:48,205 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:48,226 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2024-10-23 19:42:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-10-23 19:42:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:48,229 INFO L225 Difference]: With dead ends: 49 [2024-10-23 19:42:48,229 INFO L226 Difference]: Without dead ends: 29 [2024-10-23 19:42:48,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:48,232 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:48,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-23 19:42:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-23 19:42:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-23 19:42:48,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 39 [2024-10-23 19:42:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:48,239 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-23 19:42:48,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 19:42:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-23 19:42:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 19:42:48,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:48,241 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:48,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 19:42:48,442 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 [2024-10-23 19:42:48,442 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:48,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1976122640, now seen corresponding path program 1 times [2024-10-23 19:42:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800363448] [2024-10-23 19:42:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 19:42:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800363448] [2024-10-23 19:42:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800363448] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:48,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668813056] [2024-10-23 19:42:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:48,518 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) [2024-10-23 19:42:48,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:42:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:48,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:48,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668813056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:48,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-23 19:42:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351287510] [2024-10-23 19:42:48,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:48,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:42:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:42:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:42:48,678 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-23 19:42:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:48,702 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-10-23 19:42:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 19:42:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-10-23 19:42:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:48,704 INFO L225 Difference]: With dead ends: 58 [2024-10-23 19:42:48,704 INFO L226 Difference]: Without dead ends: 32 [2024-10-23 19:42:48,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:42:48,705 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:48,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-23 19:42:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-23 19:42:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-23 19:42:48,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 39 [2024-10-23 19:42:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:48,710 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-23 19:42:48,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-23 19:42:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-23 19:42:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-23 19:42:48,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:48,712 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:48,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-23 19:42:48,912 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 [2024-10-23 19:42:48,912 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:48,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -71399842, now seen corresponding path program 2 times [2024-10-23 19:42:48,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:48,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479525114] [2024-10-23 19:42:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:48,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 19:42:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-23 19:42:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:48,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-23 19:42:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-23 19:42:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:49,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479525114] [2024-10-23 19:42:49,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479525114] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:49,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338370337] [2024-10-23 19:42:49,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:42:49,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:49,006 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) [2024-10-23 19:42:49,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:42:49,100 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:42:49,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:49,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:42:49,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:49,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338370337] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:49,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:49,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-23 19:42:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334758434] [2024-10-23 19:42:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:49,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-23 19:42:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-23 19:42:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-23 19:42:49,246 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:42:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:49,302 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2024-10-23 19:42:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 19:42:49,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-10-23 19:42:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:49,307 INFO L225 Difference]: With dead ends: 68 [2024-10-23 19:42:49,307 INFO L226 Difference]: Without dead ends: 42 [2024-10-23 19:42:49,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-23 19:42:49,308 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:49,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-23 19:42:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-23 19:42:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-23 19:42:49,321 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2024-10-23 19:42:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:49,321 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-23 19:42:49,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:42:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-23 19:42:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-23 19:42:49,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:49,323 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:49,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-23 19:42:49,523 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 [2024-10-23 19:42:49,524 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:49,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1756456273, now seen corresponding path program 3 times [2024-10-23 19:42:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:49,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858864420] [2024-10-23 19:42:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:49,575 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 19:42:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:49,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 19:42:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:49,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-23 19:42:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-23 19:42:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858864420] [2024-10-23 19:42:49,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858864420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:49,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005377096] [2024-10-23 19:42:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:42:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:49,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:49,604 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) [2024-10-23 19:42:49,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:42:49,687 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:42:49,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:49,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:49,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-23 19:42:49,707 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005377096] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:49,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:49,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-10-23 19:42:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516000659] [2024-10-23 19:42:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:49,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:42:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:42:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:42:49,712 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:49,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:49,743 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2024-10-23 19:42:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:42:49,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-10-23 19:42:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:49,744 INFO L225 Difference]: With dead ends: 71 [2024-10-23 19:42:49,744 INFO L226 Difference]: Without dead ends: 44 [2024-10-23 19:42:49,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:42:49,745 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:49,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-23 19:42:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2024-10-23 19:42:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-10-23 19:42:49,751 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 57 [2024-10-23 19:42:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:49,751 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-10-23 19:42:49,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-10-23 19:42:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-23 19:42:49,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:49,753 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:49,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:49,957 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 [2024-10-23 19:42:49,958 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:49,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash 882234655, now seen corresponding path program 1 times [2024-10-23 19:42:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443752317] [2024-10-23 19:42:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 19:42:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 19:42:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-23 19:42:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-23 19:42:50,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443752317] [2024-10-23 19:42:50,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443752317] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883636875] [2024-10-23 19:42:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:50,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:50,081 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) [2024-10-23 19:42:50,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:42:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:42:50,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-23 19:42:50,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-23 19:42:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883636875] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:50,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:50,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 13] total 26 [2024-10-23 19:42:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762824837] [2024-10-23 19:42:50,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:50,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-23 19:42:50,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-23 19:42:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-23 19:42:50,565 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 19:42:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:50,609 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2024-10-23 19:42:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 19:42:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2024-10-23 19:42:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:50,612 INFO L225 Difference]: With dead ends: 79 [2024-10-23 19:42:50,613 INFO L226 Difference]: Without dead ends: 52 [2024-10-23 19:42:50,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-23 19:42:50,614 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:50,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-23 19:42:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-23 19:42:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-10-23 19:42:50,626 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 66 [2024-10-23 19:42:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:50,626 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-10-23 19:42:50,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-23 19:42:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-10-23 19:42:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-23 19:42:50,627 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:50,627 INFO L215 NwaCegarLoop]: trace histogram [22, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:50,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 19:42:50,828 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 [2024-10-23 19:42:50,828 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:50,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -450693842, now seen corresponding path program 2 times [2024-10-23 19:42:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214908818] [2024-10-23 19:42:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:50,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,529 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-23 19:42:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,536 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-23 19:42:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-23 19:42:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:51,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:51,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214908818] [2024-10-23 19:42:51,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214908818] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:51,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275518791] [2024-10-23 19:42:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:42:51,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:51,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:51,555 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) [2024-10-23 19:42:51,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:42:51,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:42:51,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:51,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-23 19:42:51,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:51,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275518791] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:52,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 43 [2024-10-23 19:42:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691926338] [2024-10-23 19:42:52,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:52,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-23 19:42:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-23 19:42:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-10-23 19:42:52,481 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-23 19:42:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:52,551 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2024-10-23 19:42:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-23 19:42:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 79 [2024-10-23 19:42:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:52,553 INFO L225 Difference]: With dead ends: 98 [2024-10-23 19:42:52,553 INFO L226 Difference]: Without dead ends: 70 [2024-10-23 19:42:52,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-10-23 19:42:52,554 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:52,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-23 19:42:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-23 19:42:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2024-10-23 19:42:52,561 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 79 [2024-10-23 19:42:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:52,561 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2024-10-23 19:42:52,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-23 19:42:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2024-10-23 19:42:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-23 19:42:52,563 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:52,563 INFO L215 NwaCegarLoop]: trace histogram [40, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:52,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 19:42:52,763 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 [2024-10-23 19:42:52,764 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:52,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -490347282, now seen corresponding path program 3 times [2024-10-23 19:42:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:52,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800875516] [2024-10-23 19:42:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-10-23 19:42:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-23 19:42:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 5 proven. 81 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2024-10-23 19:42:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:52,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800875516] [2024-10-23 19:42:52,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800875516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:52,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813323156] [2024-10-23 19:42:52,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:42:52,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:52,978 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) [2024-10-23 19:42:52,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:42:53,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-23 19:42:53,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:53,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:42:53,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-10-23 19:42:53,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2024-10-23 19:42:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813323156] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:53,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-23 19:42:53,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475767267] [2024-10-23 19:42:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:53,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-23 19:42:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-23 19:42:53,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-23 19:42:53,197 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:53,241 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-10-23 19:42:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-23 19:42:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2024-10-23 19:42:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:53,244 INFO L225 Difference]: With dead ends: 104 [2024-10-23 19:42:53,244 INFO L226 Difference]: Without dead ends: 78 [2024-10-23 19:42:53,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-23 19:42:53,245 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:53,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-23 19:42:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-10-23 19:42:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2024-10-23 19:42:53,252 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 97 [2024-10-23 19:42:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:53,252 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2024-10-23 19:42:53,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2024-10-23 19:42:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-10-23 19:42:53,254 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:53,254 INFO L215 NwaCegarLoop]: trace histogram [40, 12, 12, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:53,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:53,458 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 [2024-10-23 19:42:53,459 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:53,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:53,459 INFO L85 PathProgramCache]: Analyzing trace with hash 279869319, now seen corresponding path program 4 times [2024-10-23 19:42:53,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:53,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038658806] [2024-10-23 19:42:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:53,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-23 19:42:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,689 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-10-23 19:42:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 7 proven. 135 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-10-23 19:42:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038658806] [2024-10-23 19:42:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038658806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724429406] [2024-10-23 19:42:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:42:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:53,702 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) [2024-10-23 19:42:53,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 19:42:53,897 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:42:53,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:53,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 19:42:53,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 177 proven. 15 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2024-10-23 19:42:53,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2024-10-23 19:42:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724429406] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:53,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-23 19:42:53,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466772670] [2024-10-23 19:42:53,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:53,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-23 19:42:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:53,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-23 19:42:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-10-23 19:42:53,983 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:54,028 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2024-10-23 19:42:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 19:42:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 110 [2024-10-23 19:42:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:54,030 INFO L225 Difference]: With dead ends: 125 [2024-10-23 19:42:54,030 INFO L226 Difference]: Without dead ends: 92 [2024-10-23 19:42:54,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2024-10-23 19:42:54,031 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:54,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-23 19:42:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-10-23 19:42:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:54,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2024-10-23 19:42:54,038 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 110 [2024-10-23 19:42:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:54,039 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2024-10-23 19:42:54,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:54,039 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2024-10-23 19:42:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-10-23 19:42:54,040 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:54,040 INFO L215 NwaCegarLoop]: trace histogram [40, 27, 27, 24, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:54,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-23 19:42:54,241 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 [2024-10-23 19:42:54,241 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:54,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2136604530, now seen corresponding path program 5 times [2024-10-23 19:42:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478427923] [2024-10-23 19:42:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:54,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:54,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:54,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-23 19:42:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:54,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-10-23 19:42:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 17 proven. 630 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2024-10-23 19:42:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478427923] [2024-10-23 19:42:54,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478427923] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944753548] [2024-10-23 19:42:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:42:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:54,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:54,617 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) [2024-10-23 19:42:54,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 19:42:54,805 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-23 19:42:54,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:54,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 19:42:54,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 579 proven. 7 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2024-10-23 19:42:54,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1990 backedges. 53 proven. 163 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2024-10-23 19:42:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944753548] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:54,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:54,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2024-10-23 19:42:54,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674984842] [2024-10-23 19:42:54,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:54,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 19:42:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 19:42:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-10-23 19:42:54,965 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:42:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:55,053 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2024-10-23 19:42:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-23 19:42:55,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 155 [2024-10-23 19:42:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:55,055 INFO L225 Difference]: With dead ends: 164 [2024-10-23 19:42:55,055 INFO L226 Difference]: Without dead ends: 116 [2024-10-23 19:42:55,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-10-23 19:42:55,056 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:55,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-23 19:42:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-10-23 19:42:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0990990990990992) internal successors, (122), 111 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-10-23 19:42:55,069 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 155 [2024-10-23 19:42:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:55,069 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-10-23 19:42:55,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:42:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-10-23 19:42:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-10-23 19:42:55,072 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:55,072 INFO L215 NwaCegarLoop]: trace histogram [51, 51, 40, 30, 21, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:55,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-23 19:42:55,272 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 [2024-10-23 19:42:55,273 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:55,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1676538930, now seen corresponding path program 6 times [2024-10-23 19:42:55,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595162685] [2024-10-23 19:42:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-10-23 19:42:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-10-23 19:42:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 213 proven. 1965 refuted. 0 times theorem prover too weak. 2656 trivial. 0 not checked. [2024-10-23 19:42:55,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:55,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595162685] [2024-10-23 19:42:55,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595162685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:55,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586662334] [2024-10-23 19:42:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:42:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:55,806 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) [2024-10-23 19:42:55,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 19:42:56,100 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-23 19:42:56,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:56,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:42:56,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 1812 proven. 21 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2024-10-23 19:42:56,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4813 trivial. 0 not checked. [2024-10-23 19:42:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586662334] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:56,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:56,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2024-10-23 19:42:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056794722] [2024-10-23 19:42:56,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:56,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-23 19:42:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-23 19:42:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2024-10-23 19:42:56,352 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:56,438 INFO L93 Difference]: Finished difference Result 200 states and 234 transitions. [2024-10-23 19:42:56,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-23 19:42:56,439 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 227 [2024-10-23 19:42:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:56,441 INFO L225 Difference]: With dead ends: 200 [2024-10-23 19:42:56,441 INFO L226 Difference]: Without dead ends: 128 [2024-10-23 19:42:56,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2024-10-23 19:42:56,442 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:56,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-23 19:42:56,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2024-10-23 19:42:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 122 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2024-10-23 19:42:56,461 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 227 [2024-10-23 19:42:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:56,461 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2024-10-23 19:42:56,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-23 19:42:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2024-10-23 19:42:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-10-23 19:42:56,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:56,467 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 40, 33, 21, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:56,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:56,667 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 [2024-10-23 19:42:56,667 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:56,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1619485849, now seen corresponding path program 7 times [2024-10-23 19:42:56,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:56,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18289478] [2024-10-23 19:42:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:56,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:57,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:57,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-10-23 19:42:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:57,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-10-23 19:42:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5395 backedges. 233 proven. 2211 refuted. 0 times theorem prover too weak. 2951 trivial. 0 not checked. [2024-10-23 19:42:57,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:57,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18289478] [2024-10-23 19:42:57,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18289478] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:57,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586027079] [2024-10-23 19:42:57,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:42:57,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:57,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:57,214 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) [2024-10-23 19:42:57,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 19:42:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:57,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-23 19:42:57,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5395 backedges. 1519 proven. 187 refuted. 0 times theorem prover too weak. 3689 trivial. 0 not checked. [2024-10-23 19:42:57,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5395 backedges. 233 proven. 2211 refuted. 0 times theorem prover too weak. 2951 trivial. 0 not checked. [2024-10-23 19:42:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586027079] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:57,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:57,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2024-10-23 19:42:57,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478121318] [2024-10-23 19:42:57,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:57,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-23 19:42:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-23 19:42:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:42:57,810 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:42:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:57,907 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2024-10-23 19:42:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-23 19:42:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 244 [2024-10-23 19:42:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:57,909 INFO L225 Difference]: With dead ends: 240 [2024-10-23 19:42:57,909 INFO L226 Difference]: Without dead ends: 157 [2024-10-23 19:42:57,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 482 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:42:57,910 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:57,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 111 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-23 19:42:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2024-10-23 19:42:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0723684210526316) internal successors, (163), 152 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2024-10-23 19:42:57,918 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 244 [2024-10-23 19:42:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:57,919 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2024-10-23 19:42:57,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 23 states have internal predecessors, (93), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:42:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2024-10-23 19:42:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2024-10-23 19:42:57,923 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:57,923 INFO L215 NwaCegarLoop]: trace histogram [84, 84, 63, 40, 21, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:57,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:58,123 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 [2024-10-23 19:42:58,124 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:58,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2132570169, now seen corresponding path program 8 times [2024-10-23 19:42:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:58,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649240944] [2024-10-23 19:42:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:42:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,696 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-10-23 19:42:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2024-10-23 19:42:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11650 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 11545 trivial. 0 not checked. [2024-10-23 19:42:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649240944] [2024-10-23 19:42:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649240944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767241338] [2024-10-23 19:42:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:42:58,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:58,732 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) [2024-10-23 19:42:58,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 19:42:59,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:42:59,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:59,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-23 19:42:59,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11650 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 5668 trivial. 0 not checked. [2024-10-23 19:42:59,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11650 backedges. 0 proven. 5986 refuted. 0 times theorem prover too weak. 5664 trivial. 0 not checked. [2024-10-23 19:43:00,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767241338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:00,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:00,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31, 31] total 57 [2024-10-23 19:43:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147184091] [2024-10-23 19:43:00,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:00,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-23 19:43:00,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-23 19:43:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=2196, Unknown=0, NotChecked=0, Total=3192 [2024-10-23 19:43:00,680 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:43:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:00,935 INFO L93 Difference]: Finished difference Result 307 states and 357 transitions. [2024-10-23 19:43:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-23 19:43:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 334 [2024-10-23 19:43:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:00,937 INFO L225 Difference]: With dead ends: 307 [2024-10-23 19:43:00,937 INFO L226 Difference]: Without dead ends: 194 [2024-10-23 19:43:00,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 616 SyntacticMatches, 18 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=996, Invalid=2196, Unknown=0, NotChecked=0, Total=3192 [2024-10-23 19:43:00,940 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:00,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 198 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:43:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-23 19:43:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-10-23 19:43:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.1216931216931216) internal successors, (212), 189 states have internal predecessors, (212), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2024-10-23 19:43:00,950 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 334 [2024-10-23 19:43:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:00,951 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2024-10-23 19:43:00,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0350877192982457) internal successors, (173), 57 states have internal predecessors, (173), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:43:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2024-10-23 19:43:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2024-10-23 19:43:00,971 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:00,972 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:00,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-23 19:43:01,175 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 [2024-10-23 19:43:01,176 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:01,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1738068050, now seen corresponding path program 9 times [2024-10-23 19:43:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:01,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149763272] [2024-10-23 19:43:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:43:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-10-23 19:43:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2024-10-23 19:43:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22735 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22615 trivial. 0 not checked. [2024-10-23 19:43:01,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149763272] [2024-10-23 19:43:01,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149763272] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158309594] [2024-10-23 19:43:01,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:43:01,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:01,929 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) [2024-10-23 19:43:01,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 19:43:03,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-23 19:43:03,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:03,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-23 19:43:03,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22735 backedges. 9770 proven. 120 refuted. 0 times theorem prover too weak. 12845 trivial. 0 not checked. [2024-10-23 19:43:03,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 22735 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 22615 trivial. 0 not checked. [2024-10-23 19:43:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158309594] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:04,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-10-23 19:43:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991212466] [2024-10-23 19:43:04,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:04,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-23 19:43:04,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-23 19:43:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-10-23 19:43:04,165 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:43:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:04,214 INFO L93 Difference]: Finished difference Result 342 states and 403 transitions. [2024-10-23 19:43:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-23 19:43:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 443 [2024-10-23 19:43:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:04,217 INFO L225 Difference]: With dead ends: 342 [2024-10-23 19:43:04,217 INFO L226 Difference]: Without dead ends: 211 [2024-10-23 19:43:04,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-10-23 19:43:04,219 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:04,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:43:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-23 19:43:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-10-23 19:43:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.1116504854368932) internal successors, (229), 206 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2024-10-23 19:43:04,227 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 443 [2024-10-23 19:43:04,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:04,228 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2024-10-23 19:43:04,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:43:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2024-10-23 19:43:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2024-10-23 19:43:04,234 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:04,235 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:04,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-23 19:43:04,435 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 [2024-10-23 19:43:04,436 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:04,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:04,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1348357479, now seen corresponding path program 10 times [2024-10-23 19:43:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:04,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100117293] [2024-10-23 19:43:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:04,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:05,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-23 19:43:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:05,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2024-10-23 19:43:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:05,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 331 [2024-10-23 19:43:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 23143 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 22615 trivial. 0 not checked. [2024-10-23 19:43:06,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:06,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100117293] [2024-10-23 19:43:06,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100117293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188842743] [2024-10-23 19:43:06,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:43:06,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:06,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:06,024 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) [2024-10-23 19:43:06,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-23 19:43:06,429 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:43:06,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:06,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-23 19:43:06,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23143 backedges. 9770 proven. 528 refuted. 0 times theorem prover too weak. 12845 trivial. 0 not checked. [2024-10-23 19:43:06,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23143 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 22615 trivial. 0 not checked. [2024-10-23 19:43:07,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188842743] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:07,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 42 [2024-10-23 19:43:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8992706] [2024-10-23 19:43:07,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:07,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-23 19:43:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-23 19:43:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-10-23 19:43:07,108 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:43:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:07,178 INFO L93 Difference]: Finished difference Result 349 states and 400 transitions. [2024-10-23 19:43:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-23 19:43:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 460 [2024-10-23 19:43:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:07,180 INFO L225 Difference]: With dead ends: 349 [2024-10-23 19:43:07,180 INFO L226 Difference]: Without dead ends: 218 [2024-10-23 19:43:07,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 892 SyntacticMatches, 27 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-10-23 19:43:07,181 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:07,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-10-23 19:43:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-10-23 19:43:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.107981220657277) internal successors, (236), 213 states have internal predecessors, (236), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 242 transitions. [2024-10-23 19:43:07,190 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 242 transitions. Word has length 460 [2024-10-23 19:43:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:07,191 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 242 transitions. [2024-10-23 19:43:07,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:43:07,191 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 242 transitions. [2024-10-23 19:43:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2024-10-23 19:43:07,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:07,194 INFO L215 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:07,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-23 19:43:07,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-23 19:43:07,394 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:07,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1390627538, now seen corresponding path program 11 times [2024-10-23 19:43:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966494565] [2024-10-23 19:43:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-23 19:43:11,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716439068] [2024-10-23 19:43:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:43:11,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:11,902 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:43:11,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process